Air Around Us

Air is a ________ of different gases.

• solution

• mixture

• division

• separation

Which is the correct percentages for the make-up of air?

• 78% other gases

  1% Oxygen

  21% Nitrogen

• 1% other gases

  78% Oxygen

  21% Nitrogen

• 21% other gases

  1% Oxygen

  78% Nitrogen

• 1% other gases

  21% Oxygen

  78% Nitrogen

Air gets ________ when the amount of carbon dioxide, smoke and other harmful (dangerous) gases in the air increases.

• polluted

• safer

• healthier

Living things need Nitrogen for _______

• living

• shrinking

• growth

• breathing

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Most living things breath in ________

• Carbon Dioxide

• Oxygen

• Nitrogen

• Aragon

Earth is surrounded by a layer of gases called the ____________.

• Atmosphere

• Sun Shield

• Athletics

• Earthmosphere

Most of Earth's air is found close to the surface in the lowest level of the atmosphere called the Troposphere.

• True

• False

Which of the following statement is true about air?

• There are more air particles higher up

• The highest air pressure is at the Earth's surface

• The lowest air pressure is at the Earth's surface

• Air becomes thicker as you go higher up

Air pressure ___________ as altitude ___________.

• stays the same, decreases

• stays the same, increases

• decreases, increases

• increases, decreases

Does point A or B have higher air pressure?

• A

• B

• they have the same

Tags

NGSS.MS-ESS2-5