1-Pager Assignment on Charles's Law, Pressure, and Thermal Energy Transfer
Exit Ticket · Grade 8 · Science · ngss
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Short Answer Questions
Q1. In your own words, explain what Charles's Law states about the relationship between temperature and volume of a gas.
Q2. A balloon is left in a hot car on a summer day. Using Charles's Law, explain what happens to the balloon and why.
Q3. Compare how a rigid container and a flexible container respond differently when the gas inside is heated. What happens to pressure and volume in each?
Answer Key
Short Answer
Notes: Look for: direct relationship between temperature and volume, mention of constant pressure. Partial credit if student identifies the relationship but omits the constant-pressure condition. Common misconception: students may say pressure increases instead of volume.
Number: 1
Sample Answer: Charles's Law states that when the temperature of a gas increases, its volume also increases, as long as the pressure stays the same. The relationship is directly proportional — if temperature doubles, volume doubles.
Notes: Look for: connection between increased temperature and increased volume, mention of the balloon being flexible. Partial credit if student says the balloon gets bigger but does not explain the molecular-level reason. Watch for students who say pressure increases rather than volume.
Number: 2
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