The Ultimate Physics Practice Test For Students! Quiz
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- 1.Wrapping a hot potato in aluminum foil significantly reduces the rate at which it cools by
- A.
Conduction
- B.
Condensation
- C.
Evaporation
- D.
Melting
- 2.The molecules in a room-temperature glass of water jostle around at
- A.
A great variety of speeds
- B.
Much the same rates of speed
- C.
A very small range of speeds
- 3.Evaporation is a cooling process and condensation is
- A.
A warming process
- B.
A cooling process also
- C.
Neither a warming nor cooling process
- 4.Evaporation is a cooling process because
- A.
Heat is radiated during the process
- B.
Of conduction and convection
- C.
The more energetic molecules are able to escape the liquid
- D.
The temperature of the remaining liquid decreases
- 5.To say that evaporation is a cooling process is to say that the
- A.
More energetic particles escape
- B.
More energetic particles remain in the water
- C.
The less energetic particles escape
- 6.A hot dog pants
- A.
To help evaporation occur in its mouth and bronchial tract
- B.
To bring more oxygen into its lungs
- C.
For no particular reason - some things just happen
- D.
To impress dogs of the opposite sex
- 7.Steam burns are more damaging than burns caused by boiling water because steam
- A.
Gives up additional energy when it condenses
- B.
Has more energy per kilogram than boiling water
- C.
Choices A and B are both correct
- D.
Choices B and C are both incorrect
- 8.We feel uncomfortably warm on a muggy day because water molecules are
- A.
Evaporating from our moist bodies
- B.
Condensing on our bodies
- C.
Evaporating and condensing on our bodies at the same rate
- 9.We are warmed by condensation because water molecules in the air that strike our bodies
- A.
Transfer some of their kinetic energy to us
- B.
Gain kinetic energy as they change state
- C.
Form an insulating layer on our bodies
- 10.When a gas is changed to a liquid state, the gas
- A.
Releases energy
- B.
Absorbs energy
- C.
Neither releases nor absorbs energy
- D.
Both releases and absorbs energy
- 11.When a solid is changed to a liquid state, the solid
- A.
Releases energy
- B.
Absorbs energy
- C.
Neither releases nor absorbs energy
- D.
Both releases and absorbs energy
- 12.When liquids change to a solid state, they
- A.
Absorb energy
- B.
Release energy
- C.
Neither absorb nor release energy
- D.
Both absorb and release energy
- 13.Which could burn a boy scout the most?
- A.
100 g of water at 100 degrees C
- B.
100 g of steam at 100 degrees C
- C.
Both would be equally damaging
- 14.When heat is added to boiling water, its temperature
- A.
Increases.
- B.
Decreases.
- C.
Does not change.
- 15.Boiling water does not increase in temperature when additional heat is applied because
- A.
The temperature doesn't change in a change of state
- B.
Added input energy doesn't increase the water's internal energy
- C.
The increased heating produces increased boiling, and therefore increased cooling
- D.
None of these
- 16.For increased atmospheric pressure, the boiling temperature of a liquid
- A.
Goes down
- B.
Goes up
- C.
Remains at 100 degrees C
- 17.Increased air pressure on the surface of hot water tends to
- A.
Prevent boiling
- B.
Promote boiling
- C.
Neither choice A nor choice B is true
- D.
Choice A and choice B are both true
- 18.Near the top of a mountain, water in an open pot boils at
- A.
A higher temperature than at sea level
- B.
A lower temperature than at sea level
- C.
The same temperature as at sea level
- D.
None of the above choices are true
- 19.The food in a refrigerator is cooled by
- A.
Vaporization of the refrigerating fluid
- B.
Condensation of the refrigerating fluid
- C.
The ice in your nearby freezer
- 20.You can briefly touch a hot clothes iron with a bare wet finger because the wetness
- A.
Choices C and D are both true
- B.
Only Choice C is true
- C.
Absorbs energy in vaporizing
- D.
Provides an insulating layer after it changes state
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