PURPOSE : To explain how camels can live in the desert for weeks without drinking water.
MATERIALS : Hand mirror
PROCEDURE :
WHY ? Exhaled breath of humans as well as camel contains water vapor. Some of the water in breath goes into the air and some remains in the passage inside the nose. The passage inside the human nose is short and relatively straight. The camel’s nose has long twisting passage. Most of the water in a camel’s breath stays inside the nose instead of escaping into the air. This allows camels to go longer without drinking because they do not lose as much water through their exhaled breath.
MATERIALS : Hand mirror
PROCEDURE :
- Breathe onto the mirror.
WHY ? Exhaled breath of humans as well as camel contains water vapor. Some of the water in breath goes into the air and some remains in the passage inside the nose. The passage inside the human nose is short and relatively straight. The camel’s nose has long twisting passage. Most of the water in a camel’s breath stays inside the nose instead of escaping into the air. This allows camels to go longer without drinking because they do not lose as much water through their exhaled breath.
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