Understanding Gases and Their Properties

What is a bubble primarily composed of?

• Air and soap

• Soap and water

• Air and water

• Soap and oil

Which gas is produced by the human body?

• Helium

• Carbon dioxide

• Nitrogen

• Oxygen

What is the primary component of the air we need to survive?

• Carbon dioxide

• Hydrogen

• Oxygen

• Helium

What reaction creates carbon dioxide in the experiment?

• Vinegar and water

• Baking soda and water

• Baking soda and salt

• Vinegar and baking soda

How does carbon dioxide affect the bubbles in the tank?

• Changes their color

• Keeps them from sinking

• Causes them to pop

• Makes them rise faster

What property of matter is demonstrated by gases in the experiments?

• Color

• Odor

• Volume

• Mass

What does the experiment demonstrate about carbon dioxide?

• It is visible

• It is lighter than air

• It is heavier than air

• It is odorless

Why do the bubbles not hit the bottom of the tank when carbon dioxide is present?

• Carbon dioxide creates a barrier

• The tank is sealed

• The tank is too deep

• The bubbles dissolve

Which gas is lighter than air?

• Nitrogen

• Oxygen

• Helium

• Carbon dioxide

What happens to helium-filled balloons when released?

• They fall

• They float upwards

• They stay in place

• They deflate