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Review 4 Read and write.

a dinosaur fail a hobby an inventor
1 Listen. Check the inventions that you hear. TR: 9.9 a skater swings together toward

airplane battery windshield wipers wheel 1. This is a person who moves, turns, and spins on ice.

2. Collecting fossils is an example of this.

2 Listen again. Answer the questions. TR: 9.10
3. This is a person who invents things.

1. How many points do Anya and Ben have at the beginning? 4. This is a creature which lived millions of years ago.

2. What was Mary Anderson’s idea? 5. It’s the opposite of alone.

3. What is Anya’s score at the end of the competition? 6. It’s the opposite of away from.

4. What will Anya do next month? 7. The more you push these, the higher they go.

8. What’s the opposite of succeed?

3 Ask and answer questions about life before these inventions.
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Work with a partner. Take turns. 5 Write. Work with a partner. Choose list A, B, or C.

Write definitions in your notebook.

A B C
an avatar a bug backward
a battery electricity gravity

a comic book a good friend a screen
a creative person a problem a stuffed animal
(to) pull a wheel (to) take photos

It’s the opposite of push. It’s a force which pulls you

How did people use to tell the toward the earth.
time before they had clocks? They used to
look at the sun.

That’s right. 6 Read and guess. Work in a group. Take turns. Read your definitions
to the others. Can they guess?

162 Review Units 7–9 163