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Physics Worksheet
🔥 Heat
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After this worksheet you can
Understand: Heat vs. TemperatureUnderstand: Direction of Heat FlowUnderstand: Specific Heat CapacityUnderstand: Heat Transfer Formula📚 Quick Recap
Heat is energy in transit — it always flows from a hotter object to a cooler one, and understanding how much heat is needed to change a substance's temperature is essential across science and engineering.
🧠 Section A · Concept Check ● BEGINNER 4 × 1 = 4
1Find the heat to raise 3 kg of water (c=4200) by 8°C.
2A 1.5 kg block (c=800) absorbs 6000 J. Find its temperature change.
3What method of heat transfer requires no medium at all (can travel through empty space)?
4What method of heat transfer relies on the physical movement of a fluid?
🧮 Section B · Problem Solving ● INTERMEDIATE 4 × 3 = 12
5What method of heat transfer occurs through direct physical contact?
6Water has a very high specific heat capacity. What does this mean practically?
7Find the heat released when 4 kg of a substance (c=390) cools by 15°C.
8Why do coastal cities often have milder temperature swings than inland cities?
🚀 Section C · Challenge ● CHALLENGE 2 × 2 = 4
9A 0.2 kg sample absorbs 900 J and rises by 15°C. Find its specific heat capacity.
10Why can heat never spontaneously flow from a cold object to a hot one?
💭 Reflection — the most useful thing I learned:
A ___/4 B ___/12 C ___/4 Total ___/20
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✂ answer key — fold or cut before handing out
1 = 100,800 J 2 = 5°C 3 = Radiation 4 = Convection | 5 = Conduction 6 = It takes a lot of energy to change water's temperature, which is why it's slow to heat up or cool down 7 = 23,400 J 8 = Water's high specific heat capacity moderates nearby air temperatures, absorbing and releasing heat slowly | 9 = c=Q/(m*delta_T)=900/(0.2*15)=300 J/(kg*°C) 10 = This would violate the natural direction of heat flow (and the second law of thermodynamics), requiring external work to force it (like a refrigerator does)