1. How do aquatic animals breathe?
2. A lump of cotton wool shrinks in water. Why?
3. Name the harmful rays of the sun.
4. What holds the atmosphere to the earth's surface?
5. What is wind? Write its two uses.
6. Why don't we feel the pressure exerted by atmosphere?
7. List all the components of air.
Answers
Answered by
0
Answer:
through gills
2) Because they absorb water
3) Ultraviolet Ray's
4) Biosphere
5)
Answered by
2
Answer:
1.aquatic animals breathe through gills!
2.lump of cotton wool shrinks in water because a cotton has more air spaces between it
3.UV Ray's
4. air holds the atmosphere to the Earth's surface
5.wind is a mild movement of air ....... it is used for
- rotation of wind mill which makes electricity
- it is also used to maintain humid climate in our world
6. we have opposite pressure that is gravity...ok
7.nitrogen,oxygen ,carbon dioxide,Noble gases hydrogen ....... and various oxides, nitrites,
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