Air Around US_8

Which gas makes up approximately 78% of the air around us?

• Oxygen

• Nitrogen

• Carbon Dioxide

• Helium

Which gas is used to keep food fresh in packages for a longer time?

• Carbon Dioxide

• Oxygen

• Nitrogen

• Water Vapor

Which gas is used as a coolant and to store blood samples in hospitals?

• Nitrogen

• Rare Gases

• Carbon Dioxide

• Oxygen

What do living things need oxygen for?

• To preserve food

• To breathe

• To produce energy

• To inhale carbon dioxide

How do fish breathe in water?

• Through special organs called gills

• Through their skin

• They don't breathe in water

• Through their mouth

What is the process in which plants inhale carbon dioxide and exhale oxygen?

• Respiration

• Photosynthesis

• Evaporation

• Burning

Which gas is used to create bubbles in soft drinks?

• Water Vapor

• Nitrogen

• Oxygen

• Carbon Dioxide

What is the solid form of carbon dioxide called?

• Solid Carbon Dioxide

• Frozen Carbon Dioxide

• Liquid Carbon Dioxide

• Dry Ice

What is the main cause of smog?

• Carbon Dioxide

• Dust particles

• Water vapor

• Smoke

Which gas is used in colorful signboards that glow when electricity is passed through it?

• Oxygen

• Carbon Dioxide

• Nitrogen

• Neon