The stratospheric ozone layer is Earth's “sunscreen”  protecting living things from too much ultraviolet radiation from the sun.

Oxygen layer in the atmosphere

Ozone protects us from the harmful ultraviolet radiation of the sun.

Ozone formula: O3

The ozone layer lies approximately 15-40 kilometers (10-25 miles) above the Earth's surface, in the stratosphere.

1. Jupiter
2. Venus
3. Mars
4. Mercury

1. 130 million kilometers
2. 120 million kilometers
3. 180 million kilometers
4. 150 million kilometers

1. It no more orbits the Sun
2. It is not heavy enough to clear other space rocks out of its path
3. It is not round
4. None of these

1. Saturn
2. Earth
3. Jupiter
4. None of these

1. Sun
2. Mercury
3. Venus
4. None of these