Prepare to Read

Learn Key Vocabulary

Rate and Study the Words Rate how well you know each word. Then:

  • 1. Pronounce the word. Say it aloud several times. Spell it.

  • 2. Study the example.

  • 3. Tell more about the word.

  • 4. Practice it. Make the word your own.

Rating Scale

  • 1 = I have never seen this word before.

  • 2 = I am not sure of the word’s meaning.

  • 3 = I know this word and can teach the word’s meaning to someone else.

Key Words
arrive (u-rīv) verb page 115
Photograph of a jet about to land on a runway
To arrive means to reach a place. A plane arrives at an airport.
Synonym: enter
Antonym: leave		electricity (i-lek-tri-su-tē) noun page 114
Photograph of a hand inserting a plug into an electrical outlet
Electricity is a form of energy. Lamps and computers use electricity to work.		flow (flō) verb page 115
Photograph of water from a river spilling down over a wall of rock
To flow means to move freely. A river flows without stopping.
Synonyms: go, move
Antonym: stop
generate (je-nu-rāt) verb page 114
Photograph of wind turbines—tall structures with three large blades at the top that wind spins (like a pinwheel)

To generate means to make something. Windmills generate energy that people can use.
Synonyms: make, produce		goods (goodz) noun page 116
Photograph of a woman working at a deli with many food items on shelves behind her
Goods are things that people buy and sell. Stores sell goods. For this meaning, goods is always plural.		power (pow-ur) noun page 114
Photograph of a huge concrete dam holding back the river behind it
Power is energy that makes things work. A dam collects water to use as a source of power.
Synonym: force
safely (sāf-lē) adverb page 113
Photograph of a teenager wearing safety goggles as she pours a liquid into a glass beaker
To do something safely is to do it without danger. The girl is working safely because her eyes are protected from the chemicals.
Antonym: dangerously		treat (trēt) verb page 113
Photograph of hands using a cloth to rub soap onto a shirt on a table
When you treat something, you change it. You can treat a dirty shirt with soap to get stains off.		Practice the Words Work with a partner. Make an Expanded Meaning Map for each Key Word.
Illustration of a graphic organizer: a center circle with three surrounding rectangles connected to it
Expanded Meaning Map