Science F1

Inert gases also can be known as

• Noble gases

• Unstable gases

• Reactive gases

Air is a _________ of various gases, water vapour, dust and microorganisms

• element

• compound

• mixture

The percentage of oxygen in air is

• 21%

• 78%

• 0.97%

• 0.03%

The percentage of nitrogen gas in air is

• 21%

• 78%

• 0.97%

• 0.03%

The percentage of inert gases in air is

• 21%

• 78%

• 0.97%

• 0.03%

Oxygen is used

• To carry out photosynthesis

• In carbonated drink

• for cooking

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

This gas is used in fire extinguisher

• Oxygen

• Carbon dioxide

• Helium

• Nitrogen

Carbon cycle is the cycle that

• maintains the content of carbon dioxide by continuously taking carbon dioxide from the air and returning it to the air

• maintains the content of oxygen by continuously taking oxygen from the air and returning it to the air

Tags

NGSS.MS-LS2-3

Oxygen cycle is the cycle that

• maintains the content of carbon dioxide by continuously taking carbon dioxide from the air and returning it to the air

• maintains the content of oxygen by continuously taking oxygen from the air and returning it to the air

Three conditions needed for combustion (tick 3 answers)

• Fuel

• Heat

• Oxygen

• Carbon dioxide