OSE 7.1 Chemical Reactions Lesson 5

What gas could be coming from the bath bomb if it extinguishes a flame?

• Carbon dioxide

• Hydrogen

• Helium

• Oxygen

Tags

NGSS.MS-PS1-2

What percentage of air is made up of nitrogen (N₂)?

• 78%

• 21%

• 1%

• 0.04%

Which gas is able to cause a glowing ember to burst into flame?

• Oxygen

• Nitrogen

• Carbon dioxide

How can you tell that a gas is denser than the air in the room?

• It sinks when released.

• It rises quickly.

• It creates a fog.

• It makes a loud noise.

Why is carbon dioxide a possible gas released from the bath bomb?

• It extinguishes flames and is denser than air.

• It is colorful and lightweight.

• It makes a loud noise and is lighter than air.

• It mixes well with water and creates bubbles.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which gas is the most likely candidate from a bath bomb based on its density?

• Carbon dioxide

• Helium

• Hydrogen

• Methane

If the gas from a bath bomb puts out a flame below it, what can you infer about its density compared to room air?

• It’s more dense than room air.

• It’s less dense than room air.

• It’s equally dense as room air.

• Density doesn’t matter in this case.

What evidence did we use to conclude that the gas in the bubbles was not nitrogen?

• The gas increased a flame, which nitrogen does not.

• The gas smelled different from nitrogen.

• The gas was heavier than nitrogen.

• The gas turned to liquid at room temperature.

Tags

NGSS.MS-PS1-2

What gas do you think might be present if a glowing ember bursts into flame when exposed to the gas?

• Oxygen

• Helium

• Carbon dioxide

• Argon

Tags

NGSS.MS-PS1-2

What property determines whether the gas from the bath bomb sinks or rises?

• Density

• Weight

• Volume

• Shape