Breathing and the lungs
Answers are for parents and teachers.
1
Count your breaths for one minute while sitting. Write the number.
Answers differ; 12 to 20 is usual.
2
Draw boxes and arrows to show the path of air from the nose to the air sacs.
Nose, windpipe, two tubes to the lungs, air sacs.
3
Breathe on a cold glass with a grown-up and describe what you see.
A mist forms; it is tiny water drops.
4
Why do we breathe faster after running?
The body needs more oxygen and makes more carbon dioxide.
5
Explain to someone at home how a fish breathes in water.
With gills that take oxygen dissolved in the water.