20 terms

Weather- Vocab Set 1: Atmosphere

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atmosphere
the layer of gases that surround the planet
what is the atmosphere made of
78% nitrogen, 21% oxygen
what are the 3 jobs of the atmosphere
makes conditions suitable for life, traps energy to help heat the Earth, protects us from particles in space
layers of the atmosphere
troposphere, stratosphere, mesosphere, thermosphere
troposphere
layer of atmosphere closest to Earth, 12km high, where weather happens, temperature decreases with altitude
stratosphere
layer above the troposphere, 12-50 km high, contains the ozone layer, temperature increases with altitude
mesosphere
layer above the stratosphere, 50-80km, temperature decreases with altitude, meteoroids burn up in this layer
thermosphere
layer above the mesosphere, 80km and outward, no outer limit, temperature increases with altitude, divided into 2 layers (ionosphere and exosphere
electromagnetic waves
a form of energy that can travel through space
visible light
mixture of all the colors of light in the rainbow (ROYGBIV)
infrared radiation
form of energy with wavelengths that are no longer than red light (ex: heat lamps)
ultraviolet radiation
a form of energy with wavelengths that are shorter than violet light (ex: causes sunburns)
greenhouse effect
the process by which gases in the atmosphere hold heat
greenhouse gases
carbon dioxide, water vapor, methane, nitrous oxide
ozone layer
a pale blue gas that absorbs radiation from the sun and protects the surface of the Earth
3 ways heat is transferred
radiation, conduction, convection
radiation
the direct transfer of energy by electromagnetic waves (ex: face or ground warmed by the sun)
conduction
the direct transfer of heat from one substance to another substance that is touching (ex: thermometer touching the ground)
convection
the transfer of heat by the movement of a fluid (ex: air warming 1.25m above the surface
air pressure
the force exerted on you by the weight of particles of air.
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