Grade 3 composition of air

What is the percentage composition of nitrogen in air?

• 78%

• 75%

• 86%

The composition of air consists of __________ key components.

• seven

• three

• ten

Select Air is a mixture of

• Different gases

• Water vapour

• Dust

• Solid hard particles

Select the main gases present in air

• Oxygen

• Water vapour

• Carbon dioxide

• Nitrogen

All animals breathe

• Carbon dioxide

• Oxygen

Trees take ____ gas from surrounding

• Oxygen

• Carbon dioxide

Tags

NGSS.MS-LS1-6

Substance which pollute the air are

• Pollutants

• Pollution

• Dirty

Tags

NGSS.MS-ESS3-3

Which of the following is present in large amount in the air?

• Water vapour

• Carbon dioxide

• Nitrogen

• Dust

What is the gaseous form of water called?

• Ice

• Water vapour

• Dust

• Oxygen

Tags

NGSS.MS-ESS2-4

What should we wear to allow clean air to enter our nose?

• Overcoat

• Umbrella

• Jacket

• Mask