chapter 3 section 4
Ultra Violet Radiation
which is an invisible form of energy with wavelengths that are shorter than wavelengths for violet light. Harmful to humans
about 25% of incoming sunlight is ________ by clouds, dust, and gases of the atmosphere.
reflected
about 5% is _________ by the surface back into the atmosphere
reflected
gas molecules scatter ___________________wavelengths more than_______ wavelengths.
short wavelengths of visible light , long wavelengths
violet and blue have the ______ wavelengths
shortest
what three things happens to the radiation as it passes through Earth's atmosphere?
some of it passes through and heats the Earth. Some goes back into space. Some is absorbed to the atmosphere.
nearly all the energy in Earth's atmosphere comes from the ?
sun
UV rays can cause?
sunburns
radiation
the transfer of energy by electromagnetic waves
most of the energy from the sun travels to Earth in the form of _____ and ____. A small amount arrives as?
visible light, infrared radiation, UV radiation
infrared radiation is not ________ to humans but it can be felt as ____.
visible,heat
explain greenhouse effect in order
1. the sun's energy reaches earth 2.earth's surface is heated 3.some heat is radiated back into space 4.some radiated heat is absorbed by gases in the atmosphere
different wavelengths of radiation are absorbed by?
different layers in the atmosphere
all the colors in the rainbow?The different colors are the result of different?
red, orange, green, blue, indigo, violet. Wavelength
infrared radiation
a form of electromagnetic waves, has wavelengths that are longer than the wavelengths for red light
electromagnetic waves
a form of energy that can move throughspace
About 20% is ____ by gases and particles in the atmosphere.
absorbed
About 50% is _________ by Earth's surface. This heats land and the water.
absorbed
Some sunlight is _________ or _________ by the atmosphere before it can reach the surface. The rest?
absorbed, reflected. Passes through the atmosphere
Visible light
all the colors in the rainbow
sunlight must pass through what before it can reach Earth's surface?
atmosphere
over time, the amount of energy absorbed by the atmosphere and Earth's surface is in ____ with the amount of energy __ into space.
balance, radiated
why is the sky blue?
because of scattering/ scattered light
scattered light looks?
bluer than ordinary sunlight
Infrared radiation penetrates farther into the atmosphere before some of it is absorbed by___________ and ?
carbon dixiode and water vapor
scattering
dust sized particles and gases in the atmosphere disperse light in all directions
energy from the sun reaches Earth as?
electromagnetic waves (radiation)
Earth's surface radiates some energy back into the atmosphere as ?
infrared radiation
what happens to most of the sunlight that reaches Earth?
it is absorbed
how might conditions be without greenhouse effect
it would be really cold
About 50% of the energy that reaches Earth's surface is absorbed by________ and changed into _____.
land or water, heat
red and orange have the _______ wavelengths
longests
clouds act as _____, reflecting ________ back into space.
mirrors, sunlight
the greenhouse effect is a ______ process. It keeps Earth's atmosphere at a ?
natural, temp that is livable for humans
UV rays are absorbed in the _ layer?
ozone
some absorbed energy is ____ back into the atmosphere
radiated
how does most of the energy from the sun travel to Earth's surface
radiation
electromagnetic waves are classified according to ?
wavelength
