Air and Carbon dioxide

Which gas makes up 0.04 % of air?

• carbon dioxide

• nitrogen

• oxygen

• water vapor

Which gas makes up 21% of air?

• carbon dioxide

• nitrogen

• oxygen

• water vapor

Which gas makes up 78% of air?

• carbon dioxide

• nitrogen

• oxygen

• water vapor

Which gas is found in variable amounts in air?

• carbon dioxide

• nitrogen

• oxygen

• water vapor

Balloons, a meter stick, string, a stand are used to show which property of air

• Air is real

• Air takes up space

• Air exerts pressure

• Air has weight

Which items are used to show that air exerts a pressure?

• bucket

• cardboard

• glass

• string

• water

Which are uses of the gas nitrogen?

• combustion

• photosynthesis

• the water cycle

• protein formation

• fertilizers

Which are uses of the gas oxygen?

• combustion

• photosynthesis

• the water cycle

• protein formation

• respiration

Which process of the carbon cycle takes carbon dioxide out of the air?

• combustion

• decomposition

• photosynthesis

• respiration

Name 2 substances that can be combined to create carbon dioxide gas in the lab

(a)