Q3 of 38 Page 1

Write the main function of Ozone in the upper atmosphere

Ozone layer present in the stratosphere absorbs harmful UV rays from sun thus prevents its penetration to the surface of the earth.


More from this chapter

All 38 →
1

Name the process of converting vegetable oil to vegetable ghee.

 2

List two secondary sexual characters of males that are different from that of females.

 4

When a concave mirror is placed facing the Sun, the Sun’s rays converge to a point 10 cm from the mirror. Now, if you place a 2 cm long candles flame 20 cm away on the principal axis of the mirror, where would you place a screen to obtain the image of the candle? What would see the size of the image? Draw a ray diagram to justify your answer.

 5

If you find coliform bacteria in a sample of water collected from a river, what would you conclude? Give a reason for such kind of water pollution.