Our World 4: Unit 9: Student Book Review and Workbook

Exercise 1: Page 162: Listen. Check the inventions that you hear.

• airplane

• battery

• windshield wipers

• wheel

Exercise 2: Page 162: 1. How many points do Anya and Ben have at the beginning?

Exercise 2: Page 162: 2. What was Mary Anderson's idea?

Exercise 2: Page 162:

3. What is Anya's score at the end of the competition?

Exercise 2: Page 162:

4. What will Anya do next month?

Exercise 4 (page 163):

1. This is a person who moves, turns, and spins on ice. ​ (a)  

2. Collecting fossils is an example of this. ​ (b)  

3. This is a person who invents things. ​ (c)  

4. This is a creature which lived millions of years ago. ​ (d)  

5. It's the opposite of alone. ​ (e)  

• a skater
• a hobby
• an inventor
• a dinosaur
• together

Exercise 4 (page 163):

6. It's the opposite of away from. ​ (a)  

7. The more you push these, the higher they go. ​ (b)  

8. What's the opposite of succeed? ​ (c)  

• toward
• an inventor
• lean
• a skater
• swing
• swings
• fail

Extended Reading 1: Read the text on page 164 to answer these questions:

1. Leonardo bought birds at the market and ​ (a)   .

2. He studied the birds' wings so he could design a ​ (b)   machine.

3. Leonardo also designed a ​ (c)   and a parachute.

4. Mona Lisa is one of the most famous ​ (d)   in the world.

5. Leonardo lived from 1452 to ​ (e)  

• released them
• flying
• helicopter
• paintings
• 1519

Student Book Page 106. Exercise 2: Push or Pull

Groups:

(a) Push

,

(b) Pull

• Picture 1

• Picture 2

• Picture 6

• Picture 4

• Picture 5

• Picture 3

Exercise 3 (Page 107): Read. Complete the paragraphs. Can you guess who is speaking? A. "I use force To move, I ​ (a)   down on one of the pedals. The wheels turn, and move. To stop, I use the brake. The brake ​ (b)   with the wheels. The brakes and the four wheels ​ (c)   together. When they rub together like this, there is ​ (d)  

Who am I? I'm ​ (e)  

• push
• connects
• rub
• friction
• car driver
• a cyclist
• skateboarder