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Melting Point Investigation Lab
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Melting Point Investigation Lab
🧪 Part 1: Pre-Investigation Questions
1. What is a melting point?
The temperature when a solid becomes a liquid
The temperature when a liquid becomes a gas
The temperature when matter disappears
The coldest temperature a substance can reach
2. Which of these are physical changes? (Check all that apply)
Ice melting into water
Chocolate melting in your hand
Wood burning to ash
Candle wax melting
3. Predict: Which substance will have the HIGHEST melting point?
Butter
Chocolate
Soap
Candle wax
4. Why do you think different substances have different melting points?
📊 Part 2: Data Collection & Analysis
5. Your assigned substance: _______________
6. Record your temperature measurements every 30 seconds:
Time (seconds): 0 ___ 30 ___ 60 ___ 90 ___ 120 ___ 150 ___ 180 ___
Temperature (°F): ___ ___ ___ ___ ___ ___ ___
7. At what temperature did your substance completely melt? ______°F
8. Draw a simple graph of your temperature vs. time data in the box below:
9. Compare your results with other groups. List the melting points from LOWEST to HIGHEST:
1. _____________ at ____°F
2. _____________ at ____°F
3. _____________ at ____°F
4. _____________ at ____°F
🤔 Part 3: Analysis & Real-World Connections
10. Explain why melting point is considered a "characteristic property" of a substance:
11. Why do you think road salt is spread on icy roads in winter? How does this relate to melting points?
12. Extension Challenge: If you were designing a candle, why would knowing the melting point of different waxes be important?
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