AIR AND WATER, PART-2, CLASS 3(session 3)

This is a colourless, odourless and tasteless liquid.

• water

• milk

• juice

Human beings take in ________________________ gas for breathing.

• carbon dioxide

• oxygen

• nitrogen

___________________________ of the Earth's surface is covered with water.

• three fourths

• one third

• half

Which of the following is the use of air?

• 
• 
• 

Which of the following is the use of water?

• 
• 
•