Physics Final Exam: Heat

The molecules in a room-temperature glass of water jostle around at blank.

A great variety of speeds.

Evaporation takes place when a matter changes from blank.

A liquid to a gas.

A liquid boils when blank.

Air molecules form a bubble and rise. It turns to vapor at the bottom of or in the liquid. Trapped air in the liquid is heated. Trapped air in liquid rises to the surface.

If you were caught in freezing weather with only a candle for heat, you would be the warmest in blank.

An igloo.

Which would burn the most?

Both would be equally damaging.

When snow forms in clouds, the air becomes warmer because blank.

Changing from a vapor to a solid is a process that gives off energy.

Melting snow blanks.

Cools the surrounding air.

When snow forms in clouds, the surrounding air.

Cools.

Ice is put in a cooler to cool the food stored there. In order to speed up the cooling process, you should blank.

Crush the ice

A liquid is cooled if blank.

Evaporation exceeds condensation.

Clouds form when warm air blank.

Expands, Rises, and Chills.

Energy transfer by convection is primarily restricted to blank.

Fluids.

Condensation occurs when matter changes from a blank.

Gas to a liquid.

When water freezes, it blank.

Gives off energy.

A cup of hot coffee will cool faster if it blank.

Has cream in it.

Steam burns are more damaging than burns caused by boiling water because steam blank.

Has more energy per kilogram than boiling water.

The reason you can hold your finger beside a candle flame without getting hurt is that blank.

Hot air rises.

As a atmospheric pressure increases, the boiling temperature of a liquid.

Increases.

Plastic foam is a good heat blank.

Insulator.

At high altitudes, the boiling point of water blanks.

Is lower.

The reason sea breezes are usually from the sea toward the land during the day is that blank.

Land is hotter than water, cool air high over the ocean flows downward, a high-pressure area is created high above the water, and a low pressure area is created just over the shore.

Heat transfer by conduction in metals occurs when blank.

Large number of atoms move from place to place.

Heat transfer by convection occurs when blank.

Large numbers of atoms move from place to place.

When boiling water in the mountains, the time needed to reach the boiling point is blank.

Less than at sea level.

Freezing occurs when matter changes from a blank.

Liquid to a solid.

A piece of metal will feel colder than a piece of wood at the same temperature. Why?

Metal atoms are moving more slowly, on the average, than wood atoms.

Food cooked in boiling water in the mountains cooks more slowly than cooked at sea level under the pot is increased, the food will cook blank.

Neither

Heat travels from the sun to Earth by blank.

Radiation.

The reason pressure cookers cook food faster is that they blank.

Raise the boiling point of water and raise the cooking temperature for the food.

When water vapor condenses on the inside of a window, the window becomes blank.

Slightly Warmer

Morning dew on the grass is a result of blank.

Slow-moving molecules condensing on the grass.

When heat is added to boiling water, the temperature of the boiling water blank.

Stays the same.

To say that evaporation is a cooling process means that when evaporation occurs.

The remaining liquid cools.

On a humid day, water condenses on the outside of a glass of ice water. This phenomenon occurs mainly because of blank.

The saturation of cooled air.

Two pots are filled with boiling water. The pots are exactly the same size, but one pot is white and the other is black. Which pots cool faster?

The white pot.

The cooling effect inside a refrigerator is produced by blank.

Vaporizing the refrigeration liquid.

At night, a sea breeze result when blank.

Warm air over the shore rises and cooler air from the ocean takes its place.

Evaporation is a cooling process and condensation is a blank.

Warming process.

The reason light-colored clothes help keep you cool in warm weather is that clothes of light color blank.

Weigh less, have a lot of space in them, reflect a lot of energy, and absorb energy, leaving little to pass through.

In order to walk barefoot on hot coals without harming your feet, less energy would get to you if your feet were blank.

Wet.

If you take a shower in a steamy bathroom and then go to your bedroom to dry off, why will you feel colder in your bedroom?

because water evaporates off your skin, your skin will be cooled.

Pigs roll in the mud blank.

to keep them cool.

If a volume of air is warmed, it expands. If a volume of air expands, it blank.

warms.

To make freeze-dried coffee, you would spray drops of coffee into a vacuum chamber so that blank.

water would boil off, which would cool the coffee until it freezes. Once it freezes any remaining water molecules would evaporate.

Which will melt a bigger hole in a block of ice- a red-hot nail tossed on it or a red hot piece of wood of the same mass and temperature blank.

wood.