The Interior — EnglishGrades 3–5

Unit 5 · Word Power

A unit of the course: the story, then chapter by chapter — sections, numbered lessons, a source or the numbers to read, three checks each — a review per chapter, and the wrap-up at the end.

← English, the whole course

Drawn scene: a long word split into puzzle-piece blocks floating above an open dictionary under a night sky
5Unit

Word Power

Language and Vocabulary

Every reader hits a wall sometimes. A word sits in the middle of a sentence, twelve letters long, and you have never seen it. You can sound it out, but you still do not know what it means. This unit is about knocking that wall down. It turns out the wall is made of small bricks, and you already know most of them.

First you learn the bricks. Prefixes like un and re on the front of a word. Suffixes like ful and tion on the end. Roots like graph and port in the middle, left over from Greek and Latin. Learn about twenty of them and hundreds of long words open up. You will also see how the parts tell you how to spell.

Then you learn to read around a word. Writers leave clues: a definition, an example, a word that means the same, a word that means the opposite. You will learn to spot them. You will sort out words with two meanings and pick the exact word you want. And when the clues run out, you will open a dictionary and land on the right page in seconds.

The steps
Step 1

A long word stops you. You feel like skipping it. You do not.

Step 2

You find the base word or root in the middle. Believe. Port. Dict.

Step 3

You check the front for a prefix: un, re, pre, dis, mis.

Step 4

You check the end for a suffix: ful, less, ly, er, tion.

Step 5

You snap the parts together and say the meaning out loud.

Step 6

If the parts are not enough, you reread the sentence and hunt for a clue.

Step 7

You find a definition, an example, a synonym or a contrast word.

Step 8

If the word could mean two things, you let the sentence pick.

Step 9

Still stuck? You open the glossary in the back of the book.

Step 10

No glossary? You use guide words to find the dictionary page fast.

Step 11

You read the entry, check the part of speech and choose the meaning that fits.

Step 12

You add the word to your word wall, and it never stops you again.

Chapter

Word Parts

Morphology
Big questionHow can a long word be taken apart so that its pieces tell you what it means?
The story

One Long Word, Three Small Pieces

A twelve-letter word stops a reader cold, until she finds the seams and pulls it apart.

Maya is reading a book about a boy who finds a dinosaur bone in his backyard. She is doing fine until page nine. There, a word sits in the middle of a sentence like a wall: unbelievable. Twelve letters. She stares at it. She feels her face get hot. She wants to skip it.

Her teacher, Mr. Okafor, kneels by her desk. "Don't read the whole thing," he says. "Find a piece you know." Maya looks again. She sees a small word hiding in the middle: believe. She knows believe. It means to think something is true. Mr. Okafor nods. "That is the heart of the word. Now what is stuck on the front?"

Maya covers the rest with her finger and sees un. She knows un. Unhappy means not happy. Untie means the opposite of tie. So un-believe must mean not believe. Then she looks at the end and sees able. Able means you can do it. Readable means you can read it. So believable means you can believe it.

She puts the pieces back together. Un-believe-able. Not able to be believed. The boy in the book found a dinosaur bone in his own yard. Of course it was unbelievable. Maya laughs out loud. The wall is gone. It was never a wall. It was three small bricks.

Most long words in English are built this way. A piece on the front, a piece at the end, and a core in the middle. The pieces have names, and they show up again and again. Once you know about twenty of them, hundreds of long words open up. This chapter hands you the pieces.

Talk about itMaya knew all three pieces of unbelievable before she ever saw the word. Why did the whole word still scare her at first?
Section 1

Prefixes: Pieces on the Front

9.1

What un- Does to a Word

Main ideaA prefix is a word part added to the front of a word, and un- flips the word to mean not or the opposite.

Read these pairs: happy and unhappy, lock and unlock, fair and unfair. In each pair the second word starts with the same two letters, un. And in each pair, un turns the word around. Unhappy means not happy. Unlock means the opposite of lock. A word part that goes on the front of a word is called a .

The word that the prefix sticks to is called the . Happy is the base word in unhappy. The base word can stand alone. The prefix cannot. Nobody walks around saying "un." But stick un onto a base word and it goes to work. It always means not or the opposite of.

This gives you a tool. When you meet a word that starts with un, cover the un with your finger. Read the base word. Then say "not" in front of it. Unsafe? Not safe. Unable? Not able. Unwrap? The opposite of wrap. You just read a word you may never have seen before.

Words to know
prefix
a word part added to the front of a base word that changes its meaning
base word
a word that can stand alone and that prefixes or suffixes attach to
Check yourself

1. What is a prefix?

2. What does unfair mean?

3. Which word is the base word in unlock?

9.2

Again and Before: re- and pre-

Main ideaThe prefix re- means again or back, and the prefix pre- means before.

Look at this sentence: "Dad had to reheat the soup because it got cold." What did he do? He heated it again. The prefix re means again or back. Redo means do again. Rewrite means write again. Return means turn back. Refill means fill again. When you see re at the start, try saying "again" after the base word.

Now this one: "The class took a pretest before the unit started." A pretest is a test you take before you learn the material. The prefix pre means before. Preheat the oven means heat it before you cook. A preview is a view of something before it comes out. Prepay means pay before you get the thing.

Be careful. Not every word that starts with re or pre has a prefix. Red is not re plus d. Press is not pre plus ss. The test is simple. Cover the letters. Is what is left a real base word that makes sense? Re plus heat works. Re plus d does not. If the base word is not real, there is no prefix there.

Words to know
reheat
to heat something again
preview
a look at something before it fully comes out or happens
Check yourself

1. What does the prefix re- mean?

2. A preheated oven is an oven that was heated when?

3. Why is the re in red NOT a prefix?

9.3

Not and Wrong: dis- and mis-

Main ideaThe prefix dis- means not or the opposite of, and mis- means wrong or badly.

Here is a sentence from a class story: "Lena disagreed with the plan, so she spoke up." Disagree means the opposite of agree. The prefix dis means not or the opposite of, a lot like un. Dislike means not like. Disappear means the opposite of appear. Dishonest means not honest. Disconnect means the opposite of connect.

Now try this: "Tomas misspelled his own name on the test." He did not skip his name. He spelled it wrong. The prefix mis means wrong or badly. Misread means read wrong. Misplace means put in the wrong place. Misbehave means behave badly. A mistake is something done wrong.

Un, dis and mis all start words and all make the word go a different way. But they are not the same. Untie means the opposite of tie. Mistie is not a word. English picks one prefix for each base word, and you learn it by reading. When in doubt, think about the meaning. Wrong or badly? Mis. Not or opposite? Un or dis.

Words to know
disagree
to not agree; to have a different opinion
misspell
to spell a word the wrong way
Check yourself

1. What does dishonest mean?

2. If you misplace your keys, what did you do?

3. Which prefix would you add to read to mean read wrong?

Section 2

Suffixes: Pieces on the End

9.4

Full of It or Without It

Main ideaA suffix is a word part added to the end of a word; -ful means full of and -less means without.

Read these two words: hopeful and hopeless. They share the base word hope. But one describes a kid who thinks the team will win. The other describes a kid who has given up. The difference is on the end. A word part added to the end of a base word is called a . Ful and less are suffixes.

The suffix ful means full of. Hopeful means full of hope. Careful means full of care. Playful means full of play. Colorful means full of color. Notice that the suffix has one l, even though the word full has two. Hopeful. Careful. That is just how it is spelled.

The suffix less means without. Hopeless means without hope. Careless means without care. Fearless means without fear. Homeless means without a home. When you meet a long word that ends in ful or less, find the base word first. Then add "full of" or "without." Thoughtless? Without thought.

Words to know
suffix
a word part added to the end of a base word that changes its meaning or its job
fearless
without fear; not afraid
Check yourself

1. Where does a suffix go?

2. What does colorful mean?

3. A fearless dog is a dog that is what?

9.5

How and Who: -ly and -er

Main ideaThe suffix -ly usually tells how something is done, and the suffix -er often names a person who does something or compares two things.

Look at this sentence: "The cat walked quietly across the roof." How did the cat walk? Quietly. The suffix ly is added to a describing word to tell how. Quick becomes quickly. Slow becomes slowly. Sad becomes sadly. If you can ask "how did they do it?" and the answer ends in ly, you have found the suffix.

Now this one: "The painter climbed the ladder." A painter is a person who paints. The suffix er can mean a person who does something. Teach becomes teacher. Sing becomes singer. Farm becomes farmer. Build becomes builder. The base word tells you what the person does.

But er has a second job. "My brother is taller than me." Taller does not mean a person who talls. Here er compares two things. Tall, taller. Fast, faster. Cold, colder. So when you see er, ask which job it is doing. Is it a person who does the base word? Or is it comparing two things? The sentence will tell you.

Words to know
quietly
in a quiet way; without making much noise
compare
to look at two or more things to see how they are alike or different
Check yourself

1. In the sentence "She spoke softly," what does the suffix -ly tell you?

2. What is a builder?

3. In "This rope is longer than that one," what job is -er doing?

9.6

Turning Actions into Things

Main ideaThe suffix -tion turns an action word into a naming word for the act or the result.

Read this: "We will act out the play." Now this: "Her action saved the day." Act is something you do. Action is a thing you can name and talk about. The suffix turns a doing word into a naming word. Protect becomes protection. Collect becomes collection. Direct becomes direction. Invent becomes invention.

The suffix tion sounds like "shun." It is one of the most common endings in English. Many of the big words in your science and social studies books end this way. Pollution. Population. Celebration. Education. When you see one, cover the tion. Look for the action hiding at the front. Educate. Celebrate. Pollute.

Sometimes the base word loses a letter or two before tion is added. Celebrate drops the e to make celebration. Educate drops the e to make education. That is normal. The base word is still there, just a little trimmed. And the meaning is the same: the act of doing that thing, or the thing that results.

Words to know
tion
a suffix that turns an action word into a naming word, as in act and action
invention
something new that a person makes or thinks up; the act of inventing
Check yourself

1. What does the suffix -tion do to a word?

2. What action word is hiding inside protection?

3. Why does celebration have no e after the t?

Section 3

Roots: The Heart of the Word

9.7

Roots from Far Away

Main ideaA root is a word part from Greek or Latin that carries the core meaning; graph means write and tele means far.

Look at these words: telephone, telescope, television. They all start with tele. Tele is not a prefix like un. It is a . A root is a word part from an old language, often Greek or Latin, that carries the main meaning. Tele comes from Greek and means far. A telephone carries sound from far away. A telescope lets you see far away.

Here is another root: graph. It comes from Greek and means write or draw. An autograph is your name written by yourself. A paragraph is a piece of writing. A photograph is a picture drawn with light. Even the word graph, a chart, is a drawing of numbers. Now look at telegraph. Tele plus graph. Writing sent far away.

Roots are different from base words. A base word like hope can stand alone. Most roots cannot. Nobody says "I have a tele." But roots show up in dozens of words. Learn one root and you get a clue for every word that holds it. The next lesson gives you three more.

Words to know
root
a word part from Greek or Latin that carries the core meaning; it usually cannot stand alone
telescope
a tool that makes far-away things look close
autograph
a person's name written in their own handwriting
Check yourself

1. What does the Greek root tele mean?

2. What does the root graph mean?

3. How is a root different from a base word like hope?

9.8

Carry, Say and Hear

Main ideaThe Latin roots port (carry), dict (say) and aud (hear) unlock many everyday words.

A truck carries goods across the state line. When goods leave the country, we export them. When they come in, we import them. Both words hold the root port. Port comes from Latin and means carry. A portable speaker is one you can carry. A porter at a hotel carries your bags. Transport means carry across.

Now the root dict, from Latin, means say or speak. Predict means say before. A weather report predicts rain. It says rain is coming before it comes. A dictionary is a book of words we say. When a teacher dictates, she says words out loud for you to write. Contradict means say against.

The root aud means hear. An audience is a group that hears a show. Audio is sound you can hear. The auditorium is the big room where people sit and listen. Something audible is loud enough to hear. Three roots, dozens of words. Carry, say, hear. Keep them handy.

Words to know
portable
able to be carried easily
predict
to say what will happen before it happens
audible
loud enough to be heard
Check yourself

1. What does the root port mean?

2. Predict has the root dict. What does predict mean?

3. Why is a group at a show called an audience?

Section 4

Building and Spelling with Parts

9.9

Parts Help You Spell

Main ideaKnowing the word parts tells you how to spell a long word, because each part keeps its own spelling.

Sam wants to write the word unnecessary. He is not sure how many n’s it has. Then he stops and takes it apart. Un plus necessary. The prefix un ends in n. The base word necessary starts with n. So the word needs both. Unnecessary, two n’s. He did not have to memorize it. The parts told him.

This works because word parts keep their spelling when they join. Mis plus spell is misspell, two s’s. Dis plus appear is disappear, one s and two p’s. Re plus enter is reenter, two e’s. Hope plus ful is hopeful. Care plus less is careless. Write each piece, then push them together.

Two small changes are worth knowing. When a base word ends in y, the y often turns to i before a suffix. Happy plus ness is happiness. Easy plus ly is easily. When a base word ends in a silent e, keep the e before a suffix that starts with a consonant: safe plus ly is safely. Drop the e before a suffix that starts with a : bake plus er is baker.

Words to know
unnecessary
not needed
vowel
one of the letters a, e, i, o, u
Check yourself

1. Why does misspell have two s's?

2. What happens to the y in happy when you add ness?

3. How is safe plus ly spelled?

9.10

Build Your Own Words

Main ideaYou can build and read new words by snapping known parts together, and a word part wall keeps the parts where you can see them.

Take the base word help. Add ful and you get helpful. Add less and you get helpless. Add er and you get helper. Add un in front of helpful and you get unhelpful. One base word, four new words, and you know what every one of them means. Word parts are like blocks. Snap them together and something new appears.

Some words stack more than one part. Unbelievable is un plus believe plus able. Disrespectfully is dis plus respect plus ful plus ly. Start from the middle. Find the base word or root. Then read outward, one part at a time. Long words stop being scary when you know they are just short parts in a row.

Many classrooms keep a . It is a chart with the prefixes on one side, the suffixes on the other and the roots in the middle. Each part has its meaning and one example word. When a new long word shows up in a book, students check the wall. Make your own on a page in your notebook. Add a part every time you learn one. By the end of the year it will be a map to thousands of words.

Words to know
word part wall
a chart of prefixes, suffixes and roots with their meanings, kept where students can see it
helpless
without help; not able to do something alone
Check yourself

1. Which parts make up unhelpful?

2. What is the best first step for reading a long stacked word?

3. What belongs on a word part wall?

Chapter review

Word Parts

0 / 8

1. What is a prefix?

2. What does the prefix pre- mean in prepay?

3. Which word means read wrong?

4. What does the suffix -less mean in homeless?

5. In the sentence "He ran quickly," what does the -ly suffix tell you?

6. What action word is inside the word collection?

7. What does the Latin root port mean, as in transport?

8. Why does unnecessary have two n's?

Chapter

Context Clues and the Dictionary

Vocabulary
Big questionWhen you meet a word you do not know, how can the words around it and the tools on the shelf tell you what it means?
The story

The Gargantuan Dog

One strange word, one big dog, and four clues hiding in plain sight.

Deshawn is reading a story about a girl who moves to a farm. On the second page he hits a word he has never seen: gargantuan. "Bella was a gargantuan dog, a giant, so huge that her head reached the kitchen table and her tail could knock a chair over." He stops. Gar-gan-tu-an. He can say it. He still has no idea what it means.

His teacher, Ms. Reyes, has a rule for moments like this. Do not look up. Look around. "The writer almost never leaves you alone with a hard word," she says. "Read the whole sentence again. Slowly. Hunt for clues." Deshawn reads it again. This time he notices things.

Clue one: right after the word, the writer says "a giant." That is a second word that means the same thing. Clue two: "so huge." Another word that means big. Clue three: "her head reached the kitchen table." That is an example of what the dog can do. Clue four: "her tail could knock a chair over." Another example. Four clues, all pointing one way. Gargantuan means enormous.

Deshawn grins. He never needed a dictionary. The sentence handed him the answer. But then Ms. Reyes asks a harder question. "What if the clues were not there?" She points to the shelf, where a thick red dictionary sits. "Then you use the tool. And there is a trick to using it fast."

That is this chapter. First, how to read around a word to catch its meaning. Then what to do when a word has two meanings, or when two words mean almost but not quite the same thing. Then how to open a dictionary and land on the right page in seconds. And at the end, a handful of words that show up in every class you take.

Talk about itDeshawn found four clues in one sentence. Which clue would have been enough on its own, and why did the writer give him more than one?
Section 1

Clues Around the Word

10.1

When the Sentence Defines It

Main ideaA context clue is a hint in the words around an unknown word, and the easiest kind is a definition given right in the sentence.

Read this: "The hikers reached the summit, the very top of the mountain, just before noon." You may not know summit. But look at what comes right after it, set off by commas. The very top of the mountain. The writer defined the word for you inside the sentence. Any hint in the words around a hard word is called a . This one is a definition clue.

Definition clues often hide behind small signals. Commas, like the sentence above. The word is, as in "A canine is a dog." The words which means or that is. Or a dash. Writers of science and social studies books do this all the time. They know you will meet new words, so they explain them on the spot.

Here is the habit. When a word stops you, do not freeze. Read to the end of the sentence. Then read the sentence before it and the one after. Ask, did the writer tell me what this means? Very often the answer is yes. The definition is sitting right there, waiting for you to notice it.

Words to know
context clue
a hint in the words around an unknown word that helps you figure out its meaning
definition
a statement of what a word means
Check yourself

1. What is a context clue?

2. In "The hikers reached the summit, the very top of the mountain," what does summit mean?

3. Which signal often points to a definition clue?

10.2

Examples Point the Way

Main ideaAn example clue gives you samples of the unknown word so you can work out what group they belong to.

Try this: "Grandma keeps many condiments on the table, such as ketchup, mustard and hot sauce." Condiments is a strange word. But the sentence gives three examples. Ketchup, mustard, hot sauce. What do those have in common? They are things you add to food for flavor. So condiments must mean that. You figured out the group from the samples.

Example clues come with their own signals. Such as. For example. Like. Including. When you see those words after a hard word, the writer is about to show you samples. Read the samples. Ask what they share. That shared thing is the meaning.

Here is one more. "The zoo has several reptiles, including snakes, turtles and lizards." Even if reptiles is new, you know snakes, turtles and lizards. Scaly animals that lay eggs. That is close enough to keep reading. Context clues do not always give you the perfect dictionary meaning. They give you enough to understand the sentence, and that is the goal.

Words to know
example
one thing that shows what a group or an idea is like
condiment
something like ketchup or mustard that you add to food for flavor
Check yourself

1. In "condiments, such as ketchup, mustard and hot sauce," what kind of clue is given?

2. Which words usually signal an example clue?

3. What should you do with the samples in an example clue?

10.3

Same As or Opposite Of

Main ideaA synonym clue gives a word that means the same, and a contrast clue gives a word that means the opposite.

Read this: "The room was tidy. Everything was neat and in its place." You may not know tidy. But the next sentence says neat. Neat is a word that means about the same thing. A word that means the same or almost the same as another word is a . Writers often set a synonym right next to a hard word. Big and huge. Fast and quick. Tidy and neat.

Now the opposite trick. "Jonah is timid, but his sister is bold and loud." The word but tells you a flip is coming. His sister is bold. So Jonah must be the opposite of bold. Timid means shy. A word that means the opposite is called an . When a sentence sets up a contrast, the antonym tells you what the new word is not, and that is often enough.

Contrast clues come with signal words too. But. Unlike. However. Instead of. On the other hand. When you see one, look on both sides of it. One side has the word you do not know. The other side has its opposite. Here is the habit: find the signal, find the opposite, flip it.

Words to know
synonym
a word that means the same or nearly the same as another word
antonym
a word that means the opposite of another word
timid
shy; easily scared
Check yourself

1. What is a synonym?

2. In "Jonah is timid, but his sister is bold," what does but tell you?

3. Which of these is an antonym pair?

Section 2

One Word, More Than One Meaning

10.4

Same Word, Different Jobs

Main ideaMany words have more than one meaning, and the sentence around the word tells you which meaning is in use.

Read these two sentences. "The bat flew out of the cave at dusk." "She swung the bat and hit the ball." The same word, bat, is in both. But nobody swings a flying animal at a baseball. Bat has two meanings. A word with more than one meaning is a . English is full of them. Bark, ring, wave, light, watch, park, bank.

Here is the good news. You already know how to sort them out. Use the context. In the first sentence, bat flew out of a cave. Animals fly. So this bat is the animal. In the second, she swung it and hit a ball. That is the wooden bat. The other words in the sentence pick the meaning for you.

Try one more. "We sat on the bank and watched the river." A bank where you keep money does not sit next to rivers. So this bank must be the ground along the water. When a sentence seems silly, stop. The word may have a second meaning you have not tried yet. Swap in the other meaning and see if the sentence makes sense.

Words to know
multiple-meaning word
a word that has more than one meaning, like bat or bank
dusk
the time just after sunset when the light is fading
Check yourself

1. What is a multiple-meaning word?

2. In "We sat on the bank and watched the river," what does bank mean?

3. What should you do if a sentence sounds silly with the meaning you know?

10.5

Shades of Meaning

Main ideaSynonyms are not all exactly alike; walk, stroll and march each carry a different shade of meaning.

Picture three people going down the sidewalk. One walks. One strolls. One marches. All three are moving on foot. But you see three different pictures. The stroller is slow and relaxed, maybe eating ice cream. The marcher is stiff and quick, arms swinging like a soldier. Walk, stroll and march are synonyms, but they are not the same. Each one has its own shade of meaning.

Think of it like paint. Blue, sky blue and navy are all blue. But you would not paint a police car sky blue. Words work the same way. Big, large, huge, gigantic and gargantuan all mean big. But they get bigger as you go. Said, whispered, shouted and screamed all mean spoke. But each one turns the volume up or down.

Writers pick the exact shade on purpose. If you read that a boy crept into the room, you know he was sneaking. If he stomped in, he was angry. When you write, do the same. Do not settle for the first word. Ask what exact picture you want your reader to see. Then choose the word that paints it.

Words to know
shade of meaning
the small difference between words that mean almost the same thing
stroll
to walk in a slow, relaxed way
Check yourself

1. Walk, stroll and march are what kind of words?

2. Which word shows the most anger?

3. Why do writers choose one synonym over another?

Section 3

Using the Dictionary

10.6

Guide Words Find the Page

Main ideaDictionary words are in alphabetical order, and the two guide words at the top of each page tell you if your word is on that page.

A dictionary is a book that lists thousands of words and tells what they mean. The words are in , a to z. All the a words come first, then the b words, and so on. Inside the a words, the order goes by the second letter. Ant comes before apple. Then by the third letter if needed. Apple comes before apron.

Flipping page by page would take forever. So each page has two printed at the top. The first guide word is the first word on that page. The second is the last word on that page. Every word on the page falls between them in alphabetical order. If the guide words are lamp and lemon, then leaf is on that page. Lion is not. It comes after lemon.

Here is how to use them. Say your word is marble. Open near the middle, since m is in the middle of the alphabet. Look at the guide words. Mask and meal? Marble comes before mask, so flip back. Man and mare? Marble comes after man and before mare. This is the page. Run your finger down and find it.

Words to know
alphabetical order
the order of the letters from a to z, used to list words
guide words
the two words at the top of a dictionary page that show the first and last words on it
Check yourself

1. How are words listed in a dictionary?

2. What do guide words tell you?

3. The guide words are lamp and lemon. Which word is on that page?

10.7

Reading an Entry

Main ideaA dictionary entry shows how to say the word, its part of speech and its meanings, with more than one meaning numbered.

You found the page. Now look at the , which is everything the dictionary says about one word. First comes the word itself, in dark print, often broken into syllables. Then the pronunciation, which shows how to say it, with a mark on the syllable you say loudest. Then a small tag like n or v. Then the meanings, each with a number.

That small tag is the . It tells the job the word does in a sentence. N means noun, a person, place or thing. V means verb, an action or a state. Adj means adjective, a word that describes a noun. Adv means adverb, a word that tells how, when or where. The tag matters because some words do different jobs. Watch can be a noun, the thing on your wrist, or a verb, to look at.

When an entry has several numbered meanings, do not grab the first one. Go back to your sentence. Which meaning fits? "The dog was shedding" does not fit shed, a small building. It fits shed, to lose hair. The sentence chooses the meaning, just like it did with context clues. The dictionary gives you the choices. Your reading picks.

Words to know
entry
everything a dictionary says about one word
part of speech
the job a word does in a sentence, such as noun, verb, adjective or adverb
noun
a word for a person, place or thing
Check yourself

1. What does the pronunciation in an entry show?

2. What does the tag v stand for?

3. An entry has three numbered meanings. How do you pick the right one?

10.8

The Glossary in the Back

Main ideaA glossary is a short dictionary in the back of a book that defines only the words used in that book.

Flip to the back of your science book. Past the last chapter, before the index, there is a section called the . It looks like a small dictionary. Words in alphabetical order, each with a meaning. But it holds only the words that matter in that one book. A science glossary has habitat and energy. It does not have banana or bicycle.

This makes the glossary faster than a dictionary. Fewer words means fewer pages. And the meaning it gives is the one the book uses. A dictionary might list five meanings for energy. The science glossary gives you the one your science teacher means. Many textbooks print glossary words in dark print in the chapter to tell you they are there.

So here is the order to try when a word stops you. First, context clues in the sentence. Second, word parts you know. Third, the glossary if the book has one. Fourth, the dictionary. Most of the time you will not get past step one or two. But when you need steps three and four, now you know how to use them.

Words to know
glossary
a list of important words and their meanings, found in the back of a book
index
a list in the back of a book that tells which pages a topic is on
Check yourself

1. Where is a glossary found?

2. How is a glossary different from a dictionary?

3. What is the first thing to try when a word stops you?

Section 4

Words That Mean More Than They Say

10.9

Similes and Idioms

Main ideaA simile compares two things using like or as, and an idiom is a saying whose meaning is different from its words.

Read this line: "Her hands were as cold as ice." Her hands were not actually ice. The writer is comparing her hands to ice to show how cold they were. A comparison that uses the word like or as is called a . He ran like the wind. The baby slept like a rock. The sun was as hot as an oven. Similes make a picture the reader can feel.

Now this one: "It is raining cats and dogs." No animals are falling from the sky. This is an , a saying that means something different from what its words say. Raining cats and dogs means raining hard. Break a leg means good luck. Hit the hay means go to bed. Piece of cake means easy. You cannot figure out an idiom from its parts. You have to learn it.

This is tricky for anyone new to English, and that is nobody’s fault. Idioms are like inside jokes that a whole language shares. When a sentence sounds impossible, cats falling from clouds, ask if it is an idiom. Then use the context. "The test was a piece of cake, so I finished early." Finishing early tells you piece of cake means easy.

Words to know
simile
a comparison of two things using the word like or as
idiom
a saying whose meaning is different from what its words say, like hit the hay
Check yourself

1. What is a simile?

2. What does the idiom hit the hay mean?

3. Why can you not figure out an idiom from its words?

10.10

Words in Every Subject

Main ideaAcademic words like compare, evidence and structure appear in every subject, so learning them once pays off all day.

Some words follow you from class to class. In reading, the teacher says, "Compare the two characters." In math, "Compare the two fractions." In science, "Compare the two rocks." The word is the same every time. Compare means look at two things to see how they are alike and different. Words like this are called . They are the words of school.

Here are three that show up everywhere. Compare, which you just met. , which means facts or details that support an idea. Your teacher says, "Find evidence in the text." A scientist says, "The evidence shows it." And , which means the way something is built or put together. A story has a structure. A bridge has a structure. A cell has a structure.

A few more to keep: explain, describe, summarize, analyze, predict. When a question uses one of these words, it is telling you what kind of answer it wants. Describe wants details. Explain wants reasons. Predict wants a guess about what comes next. Learn these words once and every test in every class gets a little clearer.

Words to know
academic words
words used in school across many subjects, like compare, evidence and structure
evidence
facts or details that support an idea or show that something is true
structure
the way something is built or put together
Check yourself

1. What does compare mean?

2. What is evidence?

3. Why are academic words worth learning well?

Chapter review

Context Clues and the Dictionary

0 / 8

1. What is a context clue?

2. "The animals were nocturnal, that is, active at night." What kind of clue is this?

3. "Unlike his quiet brother, Ray was boisterous." What does boisterous most likely mean?

4. "The bark of the old tree was rough." Which meaning of bark is used?

5. Which word for walking shows the most hurry?

6. The guide words are sand and seal. Which word is on that page?

7. In a dictionary entry, what does n stand for?

8. "He ran like the wind." What is this?

Unit wrap-up

Word Power

Twelve words, twelve meanings

0 / 12

Tap a word, then tap its meaning. A right pair locks in green.

Words
Meanings
Unit test

Fifteen questions across the unit

0 / 15

1. What does the prefix un- mean in unlock?

2. Which word means fill again?

3. What does misbehave mean?

4. What does the suffix -ful mean in hopeful?

5. In the word teacher, what does the -er suffix mean?

6. What does the suffix -tion do in the word invention?

7. The root tele means far. What does a telescope help you do?

8. The root aud means hear. Which word holds this root?

9. How is dis + appear spelled?

10. "A habitat, the place where an animal lives, must have food and water." What kind of context clue is this?

11. "Some insects, such as ants and bees, live in large groups." What signals the example clue?

12. "Maria was cheerful, but her brother was gloomy." What does gloomy mean?

13. Which sentence uses the word light to mean not heavy?

14. The guide words are cake and camp. Which word is NOT on that page?

15. "It's raining cats and dogs" is an idiom. What does it mean?

Write it

Pick one long word you figured out this unit, like unbelievable or inaudible. Write a paragraph that claims what the word means and proves it. Use its word parts and the clues in a sentence as your evidence, and explain how each piece led you to the meaning.

  • Start with a clear claim: "The word unbelievable means not able to be believed."
  • Give evidence from the word parts: name the prefix, base word or root, and suffix, and what each one means.
  • Give evidence from context: quote the sentence where you found the word and point to the clue in it.
  • Explain your reasoning: show how the parts and the clues fit together to give one meaning.
  • End by checking the other side: could the word mean something else? Say why your meaning fits best.
0 wordsSaved on this device as you type.

Practice rooms

Rooms already on the site that belong to this unit — cards, quizzes, a lab.

For the teacher

Every lesson keeps its own three checks; a lesson is ticked when all three are right. Chapter reviews, the unit test and its spiral review (five questions from earlier units in this band) score on the page. When the site is connected to your sheet, or the link carries ?dest=, each one also has a Send box: the first-try score, the standards, the supports used, the attempt number and the minutes go to your sheet as an IEP data point.

Print this page for a paper copy of the readings, the sources, the words and the questions; the answers print as dashed boxes under each question.

Fact-check notes for this course live in the handoff: quotes marked (paraphrased) were set that way on purpose.