The Earth's Atmosphere Crossword Puzzle

QUESTIONS LIST:

• atmosphere: a layer of gases that surrounds the earth.
• troposphere: the lowest layer of earth's atmosphere where most weather phenomena occur.
• stratosphere: the second layer of earth's atmosphere, it contains the highest concentration of ozone gas.
• mesosphere: the middle and coldest layer, where the majority of meteors burn up upon entry.
• thermosphere: the second outermost and hottest layer, aurora borealis and aurora australis occur within this layer.
• exosphere: the outermost layer, where satellites orbit and transition into outer space.
• ozone: a layer of gas in the stratosphere that absorbs most of the sun's ultraviolet(uv) radiation.
• sun: it is the energy source of the earth.
• hottest: thermosphere is the _ layer.
• coldest: mesosphere is the _ layer.