GRG 301K EXAM 1 UNIVERSITY OF TEXAS AT
AUSTIN
is the Earth's atmosphere a black body object? why or why not? - ANSWERS--
Earths atmosphere is NOT a black body object
- The Earth's atmosphere SELECTIVELY absorbs and emits radiation
does the Earth absorb or radiate during the day? - ANSWERS-absorbs energy
does the Earth absorb or radiate at night? - ANSWERS-radiate energy
what does RET stand for? - ANSWERS-"radiative equilibrium temperature"
what is the Earths RET? - ANSWERS-0 F/ -18C
what is the earths actual surface temperature? - ANSWERS-59F/15C
what happens if an object radiates more energy than it absorbs? - ANSWERS-it'll
turn cold
what happens if an object absorbs more energy than it radiates? - ANSWERS-it'll
turn warmer
,what does temperature generally do with height? - ANSWERS-decreases
what is energy? - ANSWERS-the property of a system that enables it to do work
(kinetic, electrical, chemical, etc)
what is heat? - ANSWERS-- form of energy transferred between objects by virtue
of temperature differences.
why is mass an important factor when considering the effect of heat? - ANSWERS-
mass is an important factor because it determines how much heat is needed to
heat or cool an object and how fast an object heats up or cools
what is heat capacity? - ANSWERS-ratio of heat absorbed (or released) by a
system compared to the corresponding temperature rise/fall
what has a higher heat capacity, water or land? - ANSWERS-water
what is latent heat? - ANSWERS-- heat energy required for "Change of State".
what does latent mean? - ANSWERS-hidden
is evaporation more or less efficient if there is more moisture in the air? -
ANSWERS-less efficient
,T or F? latent heat is a tremendous source of atmospheric energy - ANSWERS-true
is latent heat of evaporation absorbed or released? does this make latent heat of
evaporation a cooling process or a warming process? (think of sweat evaporating)
- ANSWERS-- evaporation heat is ABSORBED so it's a COOLING process
- vapor contains potential energy, there's heat "hidden away" in water vapor
is latent heat of condensation absorbed or released? does this make latent heat
of condensation a cooling process or a warming process? (think of water droplets
on cold water bottle) - ANSWERS-- condensation heat is RELEASED within rising
air parcels so it is a WARMING process.
- vapor goes back into a liquid state and releases heat
cooling processes/heat absorbed - ANSWERS-evaporation, melting, sublimation
warming processes/heat released - ANSWERS-freezing, deposition, condensation
melting - ANSWERS-ice to liquid
evaporation - ANSWERS-liquid to vapor
sublimation - ANSWERS-ice to vapor (ex: dry ice)
, condensation - ANSWERS-vapor to liquid
deposition - ANSWERS-vapor to ice (ex: snowflakes and frost)
freezing - ANSWERS-liquid to ice
troph = _____ - ANSWERS-line (troph of low pressure = line of low pressure)
THE EARTH AND THE SUN
how much of the Suns energy is intercepted by Earth? - ANSWERS-2 billionths of
the Suns Energy
THE EARTH AND THE SUN
solar energy represents _____% of energy that heats the earth's surface -
ANSWERS-99.9%
THE EARTH AND THE SUN
what would happen to global scale winds if the sun stopped shining? - ANSWERS-
they would slowly cease
THE EARTH AND THE SUN
what causes day and night? - ANSWERS-the earths rotation
AUSTIN
is the Earth's atmosphere a black body object? why or why not? - ANSWERS--
Earths atmosphere is NOT a black body object
- The Earth's atmosphere SELECTIVELY absorbs and emits radiation
does the Earth absorb or radiate during the day? - ANSWERS-absorbs energy
does the Earth absorb or radiate at night? - ANSWERS-radiate energy
what does RET stand for? - ANSWERS-"radiative equilibrium temperature"
what is the Earths RET? - ANSWERS-0 F/ -18C
what is the earths actual surface temperature? - ANSWERS-59F/15C
what happens if an object radiates more energy than it absorbs? - ANSWERS-it'll
turn cold
what happens if an object absorbs more energy than it radiates? - ANSWERS-it'll
turn warmer
,what does temperature generally do with height? - ANSWERS-decreases
what is energy? - ANSWERS-the property of a system that enables it to do work
(kinetic, electrical, chemical, etc)
what is heat? - ANSWERS-- form of energy transferred between objects by virtue
of temperature differences.
why is mass an important factor when considering the effect of heat? - ANSWERS-
mass is an important factor because it determines how much heat is needed to
heat or cool an object and how fast an object heats up or cools
what is heat capacity? - ANSWERS-ratio of heat absorbed (or released) by a
system compared to the corresponding temperature rise/fall
what has a higher heat capacity, water or land? - ANSWERS-water
what is latent heat? - ANSWERS-- heat energy required for "Change of State".
what does latent mean? - ANSWERS-hidden
is evaporation more or less efficient if there is more moisture in the air? -
ANSWERS-less efficient
,T or F? latent heat is a tremendous source of atmospheric energy - ANSWERS-true
is latent heat of evaporation absorbed or released? does this make latent heat of
evaporation a cooling process or a warming process? (think of sweat evaporating)
- ANSWERS-- evaporation heat is ABSORBED so it's a COOLING process
- vapor contains potential energy, there's heat "hidden away" in water vapor
is latent heat of condensation absorbed or released? does this make latent heat
of condensation a cooling process or a warming process? (think of water droplets
on cold water bottle) - ANSWERS-- condensation heat is RELEASED within rising
air parcels so it is a WARMING process.
- vapor goes back into a liquid state and releases heat
cooling processes/heat absorbed - ANSWERS-evaporation, melting, sublimation
warming processes/heat released - ANSWERS-freezing, deposition, condensation
melting - ANSWERS-ice to liquid
evaporation - ANSWERS-liquid to vapor
sublimation - ANSWERS-ice to vapor (ex: dry ice)
, condensation - ANSWERS-vapor to liquid
deposition - ANSWERS-vapor to ice (ex: snowflakes and frost)
freezing - ANSWERS-liquid to ice
troph = _____ - ANSWERS-line (troph of low pressure = line of low pressure)
THE EARTH AND THE SUN
how much of the Suns energy is intercepted by Earth? - ANSWERS-2 billionths of
the Suns Energy
THE EARTH AND THE SUN
solar energy represents _____% of energy that heats the earth's surface -
ANSWERS-99.9%
THE EARTH AND THE SUN
what would happen to global scale winds if the sun stopped shining? - ANSWERS-
they would slowly cease
THE EARTH AND THE SUN
what causes day and night? - ANSWERS-the earths rotation
