1. The faster an object moves, the .

2. In the gif, there's an obvious change in but that does not mean we see a change in .

3. If the temperature goes up in the substance, this would represent of the .

4. Which units would be easiest to measure the mass of the substances before and after mixing?

• degrees fahrenheit (F)
• milligrams(mg)
• cubic meters(m3)
• kinetic energy (J)

5. A change in the type of matter before and after mixing the substances suggests which of the following?

• A change in the mass of the substances
• A change in the kinetic energy in the particles of the substances
• The temperature likely did not change after mixing the substances
• One of the substances was warmer than the other one

6. How would knowing the mass of the water and the sodium polyacrylate be useful to figure out if thermal energy was transferred in or out of the system?

• If the total mass of the water and sodium polyacrylate change, then it is evidence that energy was destroyed
• If there's more mass after the reaction, then it's likely that thermal energy was transferred out of the system
• If the total mass of the water and sodium polyacrylate remains the same before and after, then we know that the system had no thermal energy
• If there's less mass after the reaction, then it's likely that thermal energy was transferred out of the system

7. Identify two properties that give evidence that energy is present even if an object is not moving.

8. In order to make sure your team’s data is correct, you should do all of the following EXCEPT:

• Use water from different sources each time to see if the results change.
• Measure the starting temperatures of the substances to make sure they are consistent in each trial.
• Perform multiple trials of the investigation.
• Measure the mass of the substances before mixing to make sure the quantities are the same each time.

9. Why is it important in an investigation like this to use the same type of container for each trial?

10. To figure out if thermal energy was transferred during this reaction, how and when would you measure the temperatures of the materials and in what units?

11. You and your lab team are designing an investigation to determine whether thermal energy was gained or lost during the artificial snow reaction. You all have different ideas about which variables to measure. Whose suggestion would most likely produce data that would help your team to answer their investigation question?

• “We should measure the temperature of the water before mixing and then compare it to the temperature of the final mixture.”
• “We should measure the mass and volume of the substances before and after mixing.”
• “We should measure the mass and temperature of the substances before and after mixing.”
• “We should measure the mass of the substances before and after we combine them.”

12. Describe an example of how energy can move from one place to another.

13. In the space below, describe the evidence you would need to collect in an investigation that answers the following question:

"Was energy transferred into or out of the system when the artificial snow was created?"

14. How would you collect the data about changes in temperature or mass in an investigation that answers the following question?

"Was energy transferred into or out of the system when the artificial snow was created?"

15. Plan the materials, type of data, and the data collection strategy you would need in order to determine if thermal energy was transferred during this reaction.