Heat and Temperature (7 Science)
Explore the difference between heat and temperature, methods of heat transfer, and effects of heat on matter.
TL;DR: Explore the difference between heat and temperature, methods of heat transfer, and effects of heat on matter.
Written & reviewed by the Syllab.in Academic Team (CBSE/NCERT subject experts) · Updated
Explore the difference between heat and temperature, methods of heat transfer, and effects of heat on matter.
Heat and Temperature MCQs with Answers & Explanations
Q1. What is the difference between heat and temperature?
- Same thing
- Heat is energy; temperature is measure of hotness ✓ (correct)
- Temperature is energy; heat is measure
- No difference
Q2. What is the SI unit of heat?
- Degree Celsius
- Joule ✓ (correct)
- Calorie
- Kelvin
Q3. What are the three methods of heat transfer?
- Conduction, convection, radiation ✓ (correct)
- Conduction, expansion, radiation
- Evaporation, condensation, sublimation
- Melting, boiling, freezing
Q4. What is conduction of heat?
- Transfer through fluids
- Transfer through direct contact ✓ (correct)
- Transfer by radiation
- Heat generation
Q5. What is convection?
- Transfer by contact
- Transfer through movement of fluids ✓ (correct)
- Transfer by radiation
- Heat storage
Q6. What is the normal body temperature of humans?
- 35.8°C
- 36.8°C ✓ (correct)
- 37.8°C
- 38.8°C
Q7. What is thermal expansion?
- Cooling of objects
- Increase in volume of objects due to heating ✓ (correct)
- Decrease in temperature
- Change in shape only
Q8. What are good conductors of heat?
- Plastic, wood
- Metals like copper, aluminum ✓ (correct)
- Glass, rubber
- Cork, air
Q9. What are good insulators of heat?
- Copper, iron
- Cork, wool, glass, air ✓ (correct)
- Silver, aluminum
- All metals
Q10. What is the absolute zero temperature?
- 0°C
- -40°C
- -273.15°C ✓ (correct)
- 0°F
Frequently Asked Questions
Why does ice melt and water boil at specific temperatures?
These are phase change temperatures determined by the energy needed to break molecular bonds. Melting occurs at 0°C; boiling at 100°C (at standard pressure).
How do thermometers work?
Thermometers use the principle that substances expand when heated. Mercury expands uniformly with temperature, indicating the temperature on a scale.
More 7 Science MCQs
- Light Reflection and Refraction
- Electricity
- Acids Bases and Salts
- Life Processes
- Carbon and its Compounds
- Metals and Non-metals
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