How can we help?

You can also find more resources in our Help Center.

112 terms

Weather

Ch 1,2,3 Test review
STUDY
PLAY
Name the four atmospheric layers (from lowest to highest) that are distinguished by their temperature profiles.
troposphere, stratosphere, mesosphere, thermosphere
The _________ of any substance is the amount of mass of the substance contained in a unit of volume.
density
Temperatures generally decrease with height in the
troposphere
temperatures increase with height in the
stratosphere
The aurora borealis and aurora australis (northern and southern lights) are caused by the interaction between charged particles and Earth's magnetic field. Which layer of Earth's atmosphere contains these particles?
ionosphere
Why is ozone primarily important in the troposphere?
It is a pollutant, affecting vegetation and respiration.
The process of ________ removes carbon dioxide from the atmosphere.
photosynthesis
The highest temperatures are typically found in the
thermosphere
The predominant gases in Earth's earliest atmosphere probably were
hydrogen and helium
heterosphere?
It is populated primarily by variable gases.
Fairly narrow boundary zones separating relatively warm and cold air are referred to as
fronts
Atmospheric pressure is routinely plotted on maps by the use of lines called
isobars
Which part of the atmosphere shields Earth from harmful ultraviolet radiation?
stratosphere
The gases spewed out during volcanic events are predominantly
water vapor and carbon dioxide
It is generally believed that Earth was formed how many years ago?
4.5 billion
Which atmospheric layer contains the ozone layer?
troposphere
Situations where temperature increases with height are known as
inversions
Small solid particles and liquid droplets in the air are collectively known as
aerosols
In which atmospheric layer is air density the greatest?
troposphere
Since the 1950s, the concentration of carbon dioxide has increased at a rate of about ?
1.8
Which three gases constitute most of the gas (over 98%) in the atmosphere near Earth's surface?
nitrogen,argon, oxygen
The proper order from shortest to longest wavelength is
ultraviolet, visible, infrared
How do red and blue light differ?
red is a longer wavelength
Electromagnetic radiation with wavelengths between 0.4 and 0.7 micrometers is called
visible light
The sun emits its greatest intensity of radiation in the _________ portion of the spectrum
visible
The source of energy for nearly all atmospheric processes is
sun
Why is summer a warmer season than winter?
Earth tilts toward the Sun during summer.
The luminous surface of the sun is known as the ?
photosphere
If the temperature of an object increases, what will the radiation emitted by it do?
increase and shift toward dominantly shorter wavelengths
What are the three means by which energy is transferred in the atmosphere?
convection, radiation, and conduction
Most of the energy transfer from the sun to Earth is a result of?
radiation
Each hemisphere receives its strongest solar energy in?
summer solstice
Each hemisphere receives its weakest solar energy in?
winter solstice
The transfer of heat by the mixing of a fluid is called
convection
Kinetic energy is known as
energy of motion
Which latitude would experience the fewest hours of daylight on Dec. 21?
60 n
The astronomical beginning of spring occurs around this date in the Northern Hemisphere
March 21st
At noon on June 21, the sun will be directly overhead at
the tropic of cancer
Between Christmas and Valentine's Day in the Northern Hemisphere, the length of daylight
increases
at which temperature would the earth be radiating energy at the greatest rate or intensity?
98f
Energy transferred by electromagnetic waves is called
radiation
At a given point on Earth, beam depletion will be greatest at
sunset
The sky is blue due to
Rayleigh scattering by air molecules
About _________ of the incoming solar radiation at the top of the atmosphere actually reaches Earth's surface
50
_______ convection is driven by wind.
forced
Most of the terrestrial radiation emitted by the surface of Earth
is absorbed by the atmosphere
The Earth's ocean currents are produced by
wind
When comparing water bodies to land, water bodies
cools more slowly
The percentage of visible light reflected from an object is that object's
albedo
Most of the radiant energy emitted by Earth is in the form of
longwave radiation
The buoyant rising of heat is referred to as
free convection
The difference between absorbed and emitted radiation is called
net radiation
Red sunsets are mainly the result of
scattering
If air molecules selectively scattered only the longest wavelengths of visible light, the color of the sky would be
red
The amount of energy needed to produce a given temperature change per unit mass of the substance is known as
specific heat
The energy required to change the phase of a substance is known as
latent heat
what is the effect of an inland location that favors greater temperature extremes
continentality
Thermodynamic diagrams (such as the Stuve) depict the vertical profiles of temperature and _________ with height above the surface.
humidity
Another name for solar radiation is
insolation
When light strikes a mirror, it is reflected back as a beam of equal intensity in a manner known as
specular reflection
Diffuse reflection is actually a form of
scattering
Because of the absence of preference for any particular wavelength, scattering by clouds is sometimes called
nonselective radiation
Net radiation is the end result of the absorption of insolation and the absorption and radiation of longwave radiation. The surface has a net radiation surplus of ____ units.
29
The figure representing January-July Temperature Differences reveals that the difference between the two months is approximately _____ at the equator.
3° C
According to the figure of January-July Temperature Differences, the region under the greatest influence of continentality has a difference of _____ between the two months.
60° C
According to the Stuve diagram, the temperature and dew-point initially coincide at approximately _____ mb of pressure.
800
The Stuve diagram reveals that the temperature at 400 mb is approximately
-20
At which temperature would the earth be radiating energy at the greatest rate or intensity?
90
The peak wavelength of energy emitted by the Sun is about 0.5 microns. According to Wien's Law, the temperature of the Sun's surface should be
5,800 Kelvins
Which latitude below would experience the fewest hours of daylight on Dec. 22?
60n
According to the Stefan-Boltzmann Law, if the absolute temperature of an object doubles, the maximum energy emitted goes up by a factor of
16
hydrosphere
all water
lithosphere
all solid/rock earth
atmosphere
mixture of gas molecules microscopical small suspended particles of solid and liquid and falling precipitation
Meteorology
study of the atmosphere and "weather"
physical geography
the spatial analysis of all the physical elements and processes that make up the environment
variable gases
distribution in the atmosphere varies in both time and space
water vapor
most abundant variable gases (5km, 3 miles of atmosphere)
hydrologic cycle
water constantly cycled between the planet and the atmosphere ..water eventually condenses to form liquid droplets and ice crystals
steady state
gas concentration remains constant
residence time
length of time that individual molecules of a given substance remain in the atmosphere
amounts of nitrogen and oxygen?
nitrogen 78% oxygen 21%
homosphere
up to 50 miles of earths surface (same)
heterosphere
layered by weight and become increasingly dominant with increasing altitude
Condensation nuclei
all cloud droplets that form in nature do so on suspended aerosois
structure
layering of the atmosphere
tropopause
marks the level at which temp ceases to decrease with height
what is the result of ultraviolet radiation being absorbed by ozone
heat
ozone
form of oxygen in which three O atams are joined to form a single molecule and is essential to life on earth because it absorbs lethal ultraviolet radiation from the sun
mesosphere
extends to a height of about (80km) 50 mi and temp in the mesosphere decreases with altitude
atmospheric pressure
air tends to blow from high pressure towards areas of lower pressure
station models
information on wind speed and direction
dew point temp
higher the dew point, the greater the amount of water vapor in the air
energy
ability to do work
power
the rate at which energy is released, transferred, or received
potential energy
energy that a body possesses by virtue of its position with respect to other bodies in the field of gravity
heat
transfer from one object to another due to differences in temp
conduction
transfer of energy from molecule to molecule
convection
transfer of energy by the movement of fluid
all objects with temp above absolute 0
emit radiation
mean temp of sun surface
6000 c
mean temp of the earth
15c
solar constant
rate at witch solar energy is received on a surface at the outer edge of the atmosphere
epic plane
earth orbits the sun once every 365 days
rotation
occurs every 24 hrs around an imaginary line called earths axis
polaris
axis always tilts same direction
subsolar point
where the sun rays meets the surface at a right angle and the sun appears directly overhead
tropic of capicorn
december solstice
beam spreading
the increase in the surface area over which radiation is distributed in response to a decrease of solar angle.
royg biv
royg long...biv short wavelength
mie scattering
microscopic aerosol particles are considerably larger than air molecule and scatter longer wavelengths. exampe...seasalt and ash
sunrise and sunset appear red because
sunlight travels through aerosols and larger particulates that have settled near the surface