7.1 Composition of Air

7.1 Composition of Air

by Ms. Maan

Multiple Choice

Where is air?

• at atmosphere

• in my lungs

• everywhere

Multiple Choice

What is air made up of?

• Oxygen

• Oxygen and

  Carbon dioxide

• Oxygen, Carbon dioxide and other gases

• vacuum

Multiple Choice

1/5 of air composition is

• Nitrogen

• Oxygen

• Carbon dioxide

• Dust

Multiple Choice

Air is

• Element

• Compound

• Mixture

Multiple Choice

Can u live without air?

• Yes

• No

Multiple Choice

What gas we used to breathe to sustain life ?

• Carbon dioxide

• Nitrogen

• Helium

• Oxygen

Multiple Choice

What gas acts as a cooling agent ?

• Oxygen

• Nitrogen

• Carbon dioxide

• Neon

Multiple Choice

What gas is needed by green plants to carry out photosynthesis ?

• Carbon dioxide

• Oxygen

• Nitrogen

• Water

Multiple Choice

What gas used to fill weather balloons and airships ?

• Krypton

• Neon

• Radon

• Helium

Multiple Choice

Which gas is used in fire extinguishers to put out fires ?

• Oxygen

• Carbon dioxide

• Nitrogen

• Xenon

How is the carbon dioxide maintaned?​

​

Multiple Select

What are the processes that release carbon dioxide? 

• photosynthesis

• respiration

• combustion

• decomposition

Multiple Choice

What is the process that absorb carbon dioxide?

• photosynthesis

• respiration

• combustion

• decomposition

​Greenhouses gases such as carbon dioxide, methane, and nitrous oxides warm the Earth's surface

​gradual heating of Earth's surface, oceans and atmosphere caused by human activity

Multiple Choice

Global warming is caused by a phenomenon known as the greenhouse effect.

Fill in the Blank

An increase in the percentage of carbon dioxide in the air increases __________ of the Earth

Multiple Select

Oxygen and Carbon cycle can be maintained by

• Reforestation

• Logging

• Forest burning

• Carbon farming