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- 1. Multiple Choice
What happens to the molecules of a solid when it is heated?Slow downSpeed upDon't change speedShrink - 2. Multiple ChoiceThe liquid in a thermometer ______________ as the temperature increases.expandsdisappearsfreezesexplodes
- 3. Multiple ChoiceMany objects, such as train tracks and road joints, are specifically designed to allow extra space for ...thermal energyspecific heatthermal expansionconductors
- 4. Multiple ChoiceWhat happens to air particles when they are heated?Particles move faster and expandParticles move faster and become closer together.Particles move slower and the air expandsParticles move faster become further apart
- 5. Multiple Choice
The picture shows a bimetallic strip in a fire alarm. When there is a fire outbreak, the bimetallic strip will get hot, ....
bend downwards, complete the circuit and the alarm rings.
bend upwards, open the circuit and the alarm will not ring.
becomes longer, open the circuit and the alarm will not ring.
- 6. Multiple Choice
What is Thermal Contraction
The movement of particles.
A decrease in a materials volume when its temperature decreases
The movement of fluids in a cycle because of convection
A material through which thermal energy does not flow easily.
- 7. Multiple Choice
Water always expands as it's heated.
True
False
- 8. Multiple ChoiceWhen objects contract upon cooling...volume increases and density increases.volume increases and density decreases.volume decreases and density decreases.volume decreases and density increases.
- 9. Multiple ChoiceAlex noticed that a metal door that sticks on hot days does not stick when it cools off at night. This is because the metal contracts as it cools. The reason for this is that, as the metal cools, the atoms:become smaller and take up less spaceslow down and move closer togethermerge together to form fewer atomsspeed up and move farther apart
- 10. Multiple Choice
What would happen to the pressure of a gas which is heated at constant volume?
Its pressure would remain same
Its pressure would increase
Its pressure would decrease
- 11. Multiple Choice
Assuming that the thermal energy supplied to each of them is same, which of following states of matter would expand the least?
Solid
Liquid
Gas
- 12. Multiple ChoiceWhat is Thermal expansion?The transfer of thermal energy between materials by the collisions of particlesIs a decrease in a materials volume when temperature decreasesAn increase in a materials volume when temperature increasesChicken fried rice
- 13. Multiple ChoiceA bimetallic strip is made up of _____________________ welded together.two metals of the same kindtwo different metals that expand and contract unequallytwo different metals that expand and contract equally
- 14. Multiple Choice
When atoms vibrate more, they
become further apart
become closer together
not changing distance
- 15. Multiple Choice
Expansion can be a problem in
Power cable
Railway tracks
Fire alarm
- 16. Multiple Choice
Contraction can be a problem in
Power cable
Railway tracks
Fire alarm
- 17. Multiple Choice
Expansion can be a benefit in
Power cable
Railway tracks
Fire alarm
- Answer choicesTagsAnswer choicesTags