MET1010 Chapter 2


Terms in this set (...)

"A good absorber of a given wavelength of radiation is also a good emitter of that wavelength" This is a statement of
Kirchhoff's Law
A change of one degree on the Celsius scale is ____ a change of one degree in the Fahrenheit scale.
Larger than
A red shirt
selectively scatters red wavelengths of visible light and absorbs the rest.
According to Wein's displacement law, the wavelength at which maximum radiation occurs:
Is inversely proportional to the temperature.
An increase in albedo would be accompanied by ___ in radiative equilibrium temperature
A decrease
Charged particles from the sun that travel through space at high speeds are called:
Solar Flares
Clouds ____ infrared radiation and _____ visible radiation
Absorb, reflect
Electromagnetic radiation with wavelengths between 0.4 and 0.7 micrometers is called:
Visible Light
Energy of motion is known as
Kinetic Energy
Evaporation is a _____ process.
Heat is energy in the process of being transferred from:
Hot objects to cold objects
How do red and blue light differ?
Red has a higher wavelength and lower frequency. Blue has a lower wavelength
How much radiant energy will an object emit if its temperature is at absolute zero?
If the amount of energy lost by the earth to space each year were not approximately equal to that received,
The atmosphere's average temp. would change
If the average temperature of the sun increased, the wavelength of peak solar emission would:
Shift to a shorter wavelength.
If the earth's average surface temp. were to increase, the amount of radiation emitted from the earth's surface would _____, and the wavelength of peak emission would shift towards _____ wavelengths.
Increase, shorter
If the temperature of the air is said to be at absolute zero, one might conclude that:
The molecules contain a minimum amount of energy
If you want to keep an object cool while exposed to direct sunlight,
Wrap it up in aluminum foil with the shiny side facing outward.
In the earth's upper atmosphere, visible light given off by excited atoms and molecules procedures:
Most of the radiation emitted by a human body is in the form of:
Infrared Radiation
Often before sunrise on a calm, clear, cold morning, ice (frost) can be seen on tops of parked cars, even when the air temp. is above freezing. This happens because the tops of the cars are cooling by:
On the average, about what % of the solar energy that strikes the outer atmosphere eventually reaches earth's surface?
Rising air cools by the process of
Sinking air warms by the process of
Snow will usually melt on the rook of a home that is a
Good radiator of heat
Solar radiation reaches the earth's surface as
Visible Light
Sunlight passes through a thicker portion of the atmosphere at
Sunlight that bounces off a surface is said to be ______ from the surface
Suppose you are outside in very cold temperatures, wearing a winter coat that is quite effective at keeping you warm. Which of the following is true?
The coat is the source of heat that keeps you warm. The coat prevents your body's heat from escaping to the surrounding.
The albedo of the earth's surface is only about 4%, yet the combined albedo of the earth and atmosphere is about 30%. Which set of conditions BEST explains why?
High albedo of clouds, low albedo of water
The amount of heat energy required to bring about a small change in temperature is called the:
Specific Heat
The atmospheric greenhouse effect is produced mainly by the
Absorption and re-emission of infrared radiation by the atmosphere
The blueness of the sky is mainly due to
The scattering of sunlight by air molecules
The change of state of ice into water vapor is known as:
The cold feeling that you experience after leaving a swimming pool on a hot, dry day represents heat transport by
Latent heat
The earth emits radiation with greatest intensity at
Infrared wavelengths
The earth's radiation is often referred to as ________ radiation, while the sun's radiation is often referred to as _______ radiation.
Longwave, shortwave
The earth's radiative equilibrium temperature is
The temp. at which the Earth is absorbing solar radiation and emitting infrared radiation at equal rates
The heat energy release when water vapor changes to a liquid is called
Laten heat of condensation
The major process that warms the lower atmosphere is called:
The process of condensation and freezing:
Both release sensible heat into the environment
The proper order from shortest to longest wavelength is
Ultra violet radiation, visible light, Infrared
The sun emits a maximum amount of radiation at wavelengths near ______ , while the earth emits maximum radiation near wavelengths of ______.
.5 micrometers, 10 micrometers
The sun emits its greatest intensity of radiation in
The visible portion of the spectrum.
The term "latent" means
The transfer of heat by molecular to molecule contact is
What is released as sensible heat during the formation of clouds
Latent Heat
When a plate of hot food is left on the table for awhile, it cools by:
When water changes from a liquid to a vapor, we call this process
Which of the following determine the kind (wavelength) and amount of radiation that object emits?
Which of the following has a wavelength shorter than that of violet light?
Ultraviolet radiation
Which of the following is the poorest conductor of heat?
Still air
Which of the following provides a measure of the average speed of air molecules?
Without the atmospheric greenhouse effect, the average surface temperature would be:
Lower than at present