VIHAAN

The thick layer of air that surrounds the Earth is known as ___________ .

• Hydrosphere

• Atmosphere

• Lithosphere

• Biosphere

Jet Planes fly in this layer.

• Troposphere

• Mesosphere

• Thermosphere

• Stratosphere

Atmosphere contains two vital gases

• Carbon Monoxide

• Oxygen

• Both of the Above

• None of the Above

The ________ protects us from meteroids.

• Atmosphere

• Mesosphere

• Troposphere

• Stratosphere

Air has weight.

• True

• False

Air contains ____ of Nitrogen.

• 21%

• 68%

• 78%

• 73%

The __________ layer traps harmful UV rays of the sun.

• Ozone

• Oxygen

• Carbon Dioxide

• Nitrogen

Space Shuttles orbit around Earth in the ___________.

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

When clean water is poures out into anther container without disturbing the sediments, it is called ___________.

• Sedimentation

• Evaporation

• Decentation

___________ is the simplest way to purify water.

• Sedimentation

• Decentation

• Boiling

• Distillation