Water

Water is made of ?

• Only oxygen

• Only hydrogen

• Hydrogen and Oxygen

• None of these

Water makes about __% of the human body.

• 70

• 50

• 80

• 85

• 65

The process of water returning back to the Earth as rain , hail or snow is called ______.

• Condensation

• Precipitation

• Evaporation

• Melting

The level of water under the ground is called as ____.

• Level of groundwater

• Level of water in ground

• Drought

• Water table

Two types of Rainwater Harvesting are:

• None of these

• There are no types of rainwater harvesting

• Rooftop rainwater harvesting and Surface run-off harvesting

__% of the Earth's surface is covered with water.

• 66

• 71

• 68

• 73

Plants lose water to the atmosphere by the process of _____.

• Transpiration

• Evaporation

• Precipitation

• Cooling

The small droplets of water which are observed on the windows of cars on a winter morning are formed by the _____ of water vapour.

• Cooling

• Condensation

• Transpiration

• Freezing

The loud trembling sound heard during a thunderstorm is called ____.

• Lightning

• None of these

• Thunder

Water makes up about ____ of a plant's body weight

• 50%-90%

• 45%-90%

• 50%-80%

• 45%-80%