AIR AND WATER

The layer of atmosphere where jet plains fly

• Stratosphere

• Thermosphere

• Troposphere

• Lithosphere

Which of these protects us from harmful UV rays

• O₂

• H_2O

• O₃

• C_O2

What is present all around us

• Water

• Air

• Sand

• Soil

The nearest layer of air near Earth surface is called

• Atmosphere

• Lithosphere

• Hydrosphere

• Troposphere

The layer of Earth in which clouds are formed is the

• Troposphere

• Lonosphere

• Stratosphere

• Lithosphere

Which of these gases is present in a very small quantity in air, and is very important to plants

• Oxygen

• Carbon di oxide

• Nitrogen

• Inert gas

The gas use for burning

• Carbon di oxide

• Hydrogen

• Oxygen

• Nitrogen

The extensive use of __________ in refrigeration and Jet planes earlier has depleted the Ozone layer to a great extent

• Carbon di oxide

• C.F.C

• Pollution

• Oxygen

What holds the layer of air around earth

• Friction

• Gravity

• Boyancy

• Mechanical force

___________ water is used in laboratories for doing experiments

• Evaporated water

• Condensed water

• Filtration water

• Distilled water