Page 23 - 新思维科学学生用书8 样章

1 Respiration

2 Copy and complete these sentences.

Use these words:
decrease increase into out of
When we breathe in, the muscles in the diaphragm and between the ribs ………………… the
volume of the chest.

This makes air move ………………… the lungs.
When we breathe out, the muscles in the diaphragm and between the ribs …………………
the volume of the chest.
This makes air move ………………… the lungs.

Summary checklist

I can use a measuring cylinder to make a volume scale on a bottle.

I can do an experiment to measure the volume of air I can breathe out in one
breath.
I can describe how the diaphragm and intercostal muscles cause breathing
movements.
I can explain how these breathing movements make air move into and out of

the lungs.

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