7.1 Chemical Interactions

What should you include in your explanation of the bath bomb reaction?

• How to cook with bath bombs

• The nutritional value of Bath Bombs

• Why gas bubbles appear

• Your favorite color of the bath bomb

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

NGSS.MS-PS1-4

What did the gas bubbles observed in the bath bomb experiments indicate?

• The water temperature was decreasing

• The bath bomb was breaking into pieces

• The bath bomb was freezing

• That a chemical reaction was occurring

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Why do students record the mass of the whole system before and after the reaction?

• To determine if new matter was added or gas was formed

• To see how much water the bath bomb absorbed?

• To ensure the bottle cap is tightly on

• To compare the weight of the dry and wet bath bombs

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What does hearing a hiss when opening the bottle indicate?

• The bottle cap being too tight

• The bath bombs reacting again

• Gas escaping from a system

• Water leaking from the bottle

What key idea explains why the mass decreased when the bottle caps were opened?

• The water evaporated inside the bottle

• Gas is matter and has mass, so when it escapes, mass decreases

• Bubbles dissolved into the water causing less mass

• The bath bombs absorbed more water, decreasing mass

Tags

NGSS.MS-PS1-5

How can you tell that gas has mass in the investigation?

• The water level rises after adding the bath bombs

• The bubbles make the bottle lighter

• The fizzing sound is an indication of mass

• The mass decreases after the cap is removed and gas escapes

Tags

NGSS.MS-PS1-5

Bubbles form when two or more substances are combined ...

• Chemical Change
• Physical Change

Tags

NGSS.MS-PS1-2

What does the experiment show if the mass of a closed system does not increase?

• The bath bomb was too small

• No new matter has been added

• The water absorbed the gas

• The gas evaporated quickly

Tags

NGSS.MS-PS1-5

If the mass of the system remains the same before and after mixing the bath bombs with water, what conclusion can be drawn?

• The reaction did not produce any gas

• The bath bombs did not dissolve properly

• No new matter was created, the gas was already present

• The experiment was conducted incorrectly

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Why is it important to record the mass of the system after releasing the gas?

• To show that the gas has mass and its release affects the total mass

• To see if the gas will react with the atmosphere

• To determine how much gas fits inside the bottle

• to verify if the gas is heavier than the bath bombs

Tags

NGSS.MS-PS1-5