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2006-09-26 11:55:39 · 11 answers · asked by Anonymous in Education & Reference Homework Help

11 answers

water and oxygen

2006-09-26 11:56:28 · answer #1 · answered by ? 6 · 0 0

There are a number of atmospheric gases which make up air. The main gases are nitrogen and oxygen, which make up 78% and 21% of the volume of air respectively. Oxygen is utilised primarily by animals, including humans, but also to a small degree by plants, in the process of respiration (the metabolism of food products to generate energy).

The remaining 1% of the atmospheric gases is made up of trace gases. These include the noble gases, very inert or unreactive gases, of which the most abundant is argon. Other noble gases include neon, helium, krypton and xenon. Hydrogen is also present in trace quantities in the atmosphere, but because it is so light, over time much of it has escaped Earth's gravitational pull to space.

The remaining trace gases include the greenhouse gases, carbon dioxide, methane, nitrous oxide, water vapour and ozone, so-called because they are involved in the Earth natural greenhouse effect which keeps the planet warmer than it would be without an atmosphere.

2006-09-26 18:57:15 · answer #2 · answered by tucksie 6 · 0 1

by elements, do you mean "parts" or are you referring to the scientific definition of an element as a unreduceable material (like iron, oxygen, calcium, etc), -- assuming the latter:

the primary elements in the atomosphere are first nitrogen, and then oxygen

there is lots of hydrogen in the water and there is plenty of carbon in the carbon dioxide

there are lots of trace gasses like argon and small amounts of organics like butane

there is dust in the atomosphere that has small amounts of virtually all the minerals in it

2006-09-26 19:00:26 · answer #3 · answered by enginerd 6 · 0 0

main elements of the atmosphere temperature,pressure and humidity
main elements of which it is made is Nitrogen and oxygen

2006-09-26 18:56:43 · answer #4 · answered by raj 7 · 0 0

Nitrogen, Oxygen, Carbon Dioxide, Carbon Monoxide, hydrogen, many more trace gases..... Water vapor, acid compounds from pollution, particulate matter(dust from wind, or construction equipment)-- aggravates asthma.... pollen--aggravates allergies etc. Probably too much to list...

2006-09-26 19:00:41 · answer #5 · answered by Katherine H 2 · 0 0

Hydrogen

2006-09-26 19:03:51 · answer #6 · answered by ! 6 · 0 0

Nitrogen.

2006-09-26 18:57:34 · answer #7 · answered by Trixie D 4 · 0 0

Isn't it water and Oxygene? Joseph Priestly discovered oxygene you know. What we were breathing before then is anyone's guess.

2006-09-26 18:58:13 · answer #8 · answered by chloe40dd 2 · 0 0

Nitrogen....

2006-09-26 18:57:27 · answer #9 · answered by Silver 3 · 0 0

Bird sneezes and air.

2006-09-26 18:58:00 · answer #10 · answered by Isis 7 · 0 0

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