the condition of earth's atmosphere ar a particular time and place
envelope of gases surrounding earth, 78% nitrogen, 21% oxygen, 1% other gasses
21% of earth's atmosphere
78% of earth's atmosphere
plants need it to survive
water in the form of a gas; invisible
forms when lightning interacts with oxygen in the air
form of oxygen which contains 3 oxygen atoms in each molecule instead of the usual two
gas needed for fire to burn
plants and animals use it to release energy from food
plants and animals give it off as waste product when they break down food to produce energy
contains oxygen and other gases that living things need
traps energy from the sun, which keeps the Earth's surface warm and Earth's water in liquid form, another requirement of living things
protects Earth from dangerous radiation from the sun and from meteoroids
makes up more of the air than any other gas
second most abundant gas in the atmopshere
plants and animals take this gas directly from the air and use it to release energy from their food
plants need this gas to make food
when cells of plants and animals break down food to produce energy, they give off this gas as a waste product
argon and carbon dioxide
make up most of the other 1% of the atmosphere
refers to a gas or gases which make up less than 1% by volume of the earth's atmosphere
not the same as steam, which is made up of tiny droplets of liquid water
dust, smoke, salt and other chemicles in the air
nitrogen, oxygen, argon, carbon dioxide
four most common gases in dry air
3 ways the atmosphere is important to life on Earth
1) contains oxygen for us to survive, 2) keeps the Earth's surface warm enough for water to exist as a liquid by trapping energy from the sun, 3) prevents Earth from being hit by most meteoroids
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