Air Around Us Done by Reeha ,Sheba ,Vrisha

percentage of nitrogen in air is

• 81%

• 80%

• 79%

• 78%

percentage of oxygen in air is

• 20%

• 21%

• 22%

• 33%

all living things need ________ to survive

aquatic plant and animals breathe in--------- dissolved in water

chlorophyll is not essential for photosynthesis

• true

• false

the blanket of air around the earth is known as atmosphere

• true

• false

• not sure

• all of the above

air is necessary for burning

• yes

• no

• not sure

• never

what is magnetite

carbon dioxide consists of ----% of air

• 0.03%

• 0.1%

• 5%

• 0%

what does air contains of

• water vapour

• carbon dixide

• ozone

• noble gases

• all of them