🔬 Part 1: Predictions and Observations

1. Before the demonstration, what do you predict will happen when the heated can is placed in cold water?

2. What did you observe during the demonstration? Describe what happened to the can.

3. How quickly did the can crush?

Very slowly (over 30 seconds)

Moderately (5-10 seconds)

Very quickly (almost instantly)

4. What happened to the steam inside the can when it was placed in cold water?

It stayed as steam

It condensed back to water

It disappeared completely

🧠 Part 2: Understanding the Science

5. Complete the sentences using the words below:

Word bank: expands, contracts, pressure, condensed, higher, lower

When the can was heated, the air inside _____________ and some escaped as steam. When the can was cooled rapidly, the steam _____________ back to water. This created _____________ air pressure inside the can. The _____________ air pressure outside the can crushed it.

6. Which scientific concept best explains why the can was crushed?

Gravity pulling the can down

The cold water freezing the can

Air pressure difference between inside and outside the can

The metal becoming weaker when heated

7. Explain in your own words why the can crushed. Use the terms "air pressure" and "temperature" in your answer.

8. Give one real-world example where you might observe similar effects of temperature on gases.