The Ozone Layer

Q.

A molecule of ozone contains ______ atoms of oxygen.

1. 2

2. 1

3. 3

4. 4

Q.

What is ozone and how does it affect the ecosystem?

Q.

What is the ozone layer and how does it protect us-

Q.

The _________(atmosphere/troposphere/stratosphere) is a layer that extends up to about 10-50 km above the earth.

Q.

Which of the following protects humans from the harmful effects of UV radiations?

1. Ozone

2. smog

3. thick clouds

4. CO₂

Q.

Which of the following gases protects us from harmful sun rays?

1. Carbon dioxide

2. Nitrogen

3. Ozone

4. Oxygen

Q.

The thickness of the ozone layer is measured in terms of

1. Brazil
2. Sweden
3. South Africa
4. Argentina

Q.

Fill in the blanks to complete the analogy:

Troposphere: up to 10th km; Thermosphere: __________

Q.

Which of the following layers of the atmosphere is free from clouds?

1. Troposphere

2. Stratosphere

3. Mesosphere

4. Thermosphere

Q. The ozone layer lies in the

1. Troposphere
2. Stratosphere
3. Mesosphere
4. Thermosphere

Q. Ozone is our friend as well as our foe. How?

Q.

why is damage to the ozone layer a cause for concern? what steps are being taken to limit this damage?