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Class 7 Science Chapter 3 Heat Quiz 41 (25 MCQs)

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1. A student has a candy bar in a coat pocket. The coat is hanging on the coat rack. When the student went to eat the candy for snack, it melted. Which question would BEST help determine the source of heat that caused the candy bar to melt?
2. What happens to the molecules of a substance when it is heated?
3. The specific heat is the amount of energy needed to raise the temperature one degree Celsius of 1 gram of a substance.
4. Betty knows that different types of energy are produced by many objects around the house, such as a light bulb.Which types of energy does the bulb give off?
5. A microwave oven uses which of the following to heat foods.
6. A measure of how hot or cold something is compared to a reference point is .....
7. Ryan rubs two sticks together quickly. When he stops rubbing the sticks, he notices that they are warm to touch where he rubbed them. Which type of energy has been produced?
8. Which one is filled in the bulb of a thermometer?
9. What is a transfer of heat energy by electromagnetic waves through space?
10. Tina is boiling water in a metal pot for a weather experiment. What is most likely the reason she would need to use a pot holder for moving the metal pot?
11. What heat transfer when you burn your hand by touching a fire?
12. ..... is a tool used to measure temperature.
13. ..... is a force that slows things down and creates heat.
14. A substance can change state when enough heat energy is ..... to it or removed from it.
15. What unit do you use to measure specific latent heat?
16. A heat lamp warming up soil
17. Heat is the amount of energy in an object because of its .....
18. A sample of iron receives 50.J of heat energy that raises the temperature of the iron 25.0$^\circ$C. If iron has a specific heat of.10 J/g$^\circ$C, what is the mass of the iron sample?
19. What is a transfer of heat energy by electromagnetic waves? (a)
20. Convert:-45.9 C to K:
21. The thermometer that measures the object is called .....
22. Metal pans have a low heat capacity. This means .....
23. Which type of heat transfer occurs through electromagnetic waves?
24. The heat from your hot chocolate moves to the cooler air surrounding it, causing your hot chocolate to cool down. What is this an example of?
25. If boiling water is taken to the dark side of the moon it will
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