Review
Evaporation is a cooling process and condensation is
A warming process
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 of your skin, your skin will be cooled.
A piece of metal will feel colder than a piece of wood at the same temperature. Why?
Metals, in general, are good heat conductors.
Evaporation
a change of phase from liquid to gas that takes place at the surface of a liquid
A good absorber of radiation is
a good emitter of radiation.
A piece of paper wrapped around a thick metal bar will not ignite when touched with a lit match because
all of the above
The reason sea breezes are usually from the sea toward the land during the day is that
all of the above
The reason you can hold your fingers beside a candle flame without getting hurt is that
all of the above
Clouds form when warm air
all the above
If you were caught in freezing weather with only a candle for heat, you would be warmest in
an igloo
Food cooked in boiling water in the mountains cooks more slowly than cooked at sea level. If the temperature under the pot is increased, the food will cook
at same rate as before
If you want to cook boiled eggs while in the mountains, you should
boil the eggs for a longer time.
When snow forms, the air becomes warmer because
changing from a vapor to a solid is a process that gives off energy
formation of droplets of water on the outside of a cold soda can is a example of
condensation
When slow-moving molecules collide, some stick together. They...
condense
Melting snow
cools the surrounding air
Heat transfer by conduction in metals occurs when
electrons bump into atoms and other electrons.
Energy transfer by convection is primarily restricted to
fluids
When water freezes, it
gives off energy
Steam burns are more damaging than burns caused by boiling water because steam
has more energy per kilogram than boiling water.
Plastic foam is a good heat
insulator
A cup of hot coffee will cool faster if it
is black
At high altitudes, the boiling point of water
is lower
A liquid boils when
it turns to vapor at the bottom of or in the liquid.
Heat transfer by convection occurs when
large numbers of atoms move from place to place.
Infrared radiation is a form of
radiant energy
The metallic coating on the glass surfaces of a Thermos vacuum bottle reduces the amount of energy transferred by
radiation
The reason pressure cookers cook food faster is that they
raise the cooking temperature of the food.
The reason light-colored clothes help keep you cool in warm weather is that clothes of light color
reflect a lot of energy
To say that evaporation is a cooling process means that when evaporation occurs,
remaining liquid cools
Morning dew on the grass is a result of
slow-moving molecules condensing on the grass.
When heat is added to boiling water, the temperature of the boiling water
stays the same
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 cools faster?
the black pot
Which cools at the faster rate, a pot of boiling water left at room temperature or a pot of lukewarm water the same size left at room temperature?
the boiling water
condensation
the changeing of gas to liquid
On a humid day, water condenses on the outside of a glass of ice water. This phenomenon occurs mainly because of
the saturation of cooled air.
Newton's law of cooling says that the rate of cooling depends on
the temperature difference between an object and its surroundings.
Pigs roll in the mud
to keep there skins wet so it can evaporate
Temperature is related to average kinetic energy of molecules
true
The cooling effect inside a refrigerator is produced by
vaporizing the refrigeration liquid
At night, a sea breeze results when
warm air over the shore rises and cooler air from the ocean takes its place.
When snow forms in clouds, the surrounding air
warms
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?
wood
Firewalkers who walk barefoot on red-hot wooden coals depend on
woods poor conductivity