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VOCABULARY 1
Skaters pull, too. Look at these skaters.
skaters
1 Listen and read. TR: 9.1 The more one skater pulls, the more they spin.
The skaters don’t fall over because they
know how to balance.
2 Listen and repeat. TR: 9.2
How do skaters stop? They use force. Skaters
We use force to move. Force happens when push down hard on their skates. The skates
we push or pull. Do you push or pull when connect with the ice. The ice and skates rub
you move on a swing? You do both.
together. When two things rub together, it’s
called friction.
Look at this skier. To move, a skier pushes
on the snow. A push can move a skier
forward. It can also move a skier backward.
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forward backward
How do skaters stop?
They use force.
3 Ask and answer.
Work with a partner.
What did you learn?
148 Unit 9 149
