Natural situation in which heat is retained in Earth's atmosphere by carbon dioxide, methane, water vapor and other gases.

the height of an object or point in relation to sea level or ground level

the percentage of water vapor in the air compared to the maximum amount of water vapor that air can contain at a particular temperature.

the envelope of gases surrounding the earth or another planet

the layer of the atmosphere that is nearest to the Earth's surface. It is where most weather changes occur. It is the thinnest layer yet contains half of the Earth's atmosphere.

an instrument used to measure air pressure

the layer of the atmosphere above the mesosphere where temperatures are the highest in the atmosphere. The increasing temperature is due to solar activity.

upper limit of the atmosphere where the atoms and molecules blend into space

the layer of the atmosphere just above the troposphere and below the mesosphere. There is a temperature inversion due to the ozone layer which absorbs most of the sun's UV radiation

the amount of moisture in the air

or trioxygen, the ozone layer of the atmosphere contains a higher concentration of ozone than the rest of the atmosphere

a sub-layer of the thermosphere containing ions

a colorless, odorless unreactive gas that forms about 78 percent of the earths atmosphere

the layer of the atmosphere just above the stratosphere and below the thermosphere. It is the coldest part of the atmosphere and meteors burn up in this layer