Air around us

__________% of nitrogen is present in the atmosphere.

• 78%

• 21%

• 1%

• 0.03%

________% of carbon dioxide is present in the atmosphere.

• 98%

• 78%

• 1%

• 0.03%

____________% of oxygen is present in the atmosphere.

• 78%

• 21%

• 54%

• 1%

• 0.03%

_____________ is the gas that only support burning.

• Nitrogen

• Oxygen

• Carbon Dioxide

_____________ is used in fire extinguisher.

• Oxygen

• Nitrogen

• Carbon Dioxide

_______ and _______ prevent the dust from entering the nose.

___________ and _________ are the two ways of water cycle.

Tags

NGSS.MS-ESS2-4

______________ give out Oxygen.

Tags

NGSS.MS-LS1-6