Page 21 - 新思维科学学生用书4 样章

1 Living Things

Look what I can do!

I can understand that muscles work in pairs.

I can explain how muscles work by pulling on bones.

I can understand that when one muscle in a pair contracts, the

other muscle in the pair relaxes.

I can observe that muscles get shorter and fatter when they
contract.

I can observe that muscles get longer and thinner when they relax.

I can use a model to show how muscles work.

I can say how movement keeps us healthy.

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