ANY IDEAS..
2006-12-13 20:16:49 · 10 answers · asked by i am not a lovely girl i am cute 4 in Science & Mathematics ➔ Chemistry
Oxygen (IPA: /ˈɔksidʒən/) is a chemical element with the chemical symbol O and atomic number 8. On Earth, it is usually covalently or ionically bonded to other elements.
Unbound oxygen (also called molecular oxygen, or dioxygen, O2, a diatomic molecule) first appeared in significant quantities on Earth during the Paleoproterozoic era (between 2.5 billion years ago and 1.6 billion years ago) as a product of the metabolic action of early anaerobes (archaea and bacteria).
The presence of large amounts of free oxygen may have driven most of the organisms then living to extinction.[citation needed] The atmospheric abundance of free oxygen in later geological epochs and up to the present has been largely driven by photosynthetic organisms; roughly three quarters of the free element being produced by algae in the oceans, and one quarter from terrestrial plants.
Oh yes.... WE NEED OXYGEN TO BREATH AND SURVIVE.
2006-12-13 20:19:33 · answer #1 · answered by Ask Jeeves? No Ask Belbiz6! 2 · 1⤊ 1⤋
Its a gas available in air. We breath the whole air but our system uses oxygen only. With the help of oxygen only we break the food we eat into smaller components and release energy.
For more details read preliminary Chemistry and biology books and ask the adults in your place.
2006-12-13 20:21:36 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Oxygen is the gas from the air we breath. The human body uses it to burn glucose into CO2 and H2O.
2006-12-13 20:19:17 · answer #3 · answered by cordefr 7 · 0⤊ 0⤋
Oxygen is a gas that we need to breath to feed our blood.
We "use" them as we have too.
Yikes, what school did you go to that you do not know this?!
2006-12-13 20:18:47 · answer #4 · answered by Sir Digby Chicken Bhuna 3 · 0⤊ 0⤋
Oxygen is what we breath to keep us alive!!
2006-12-13 20:18:28 · answer #5 · answered by Bella 7 · 0⤊ 0⤋
oxygen is a gas. you breathe it. it helps you stay alive.
2006-12-13 20:18:58 · answer #6 · answered by wrldzgr8stdad 4 · 0⤊ 0⤋
i'm addicted to the smell of the stuff,i dont think i could live without it.
2006-12-13 20:19:03 · answer #7 · answered by Anonymous · 0⤊ 1⤋
I have to think of it but i don't have this much time...
2006-12-13 20:20:05 · answer #8 · answered by Anonymous · 0⤊ 0⤋
please tell me you arent serious...you really dont know what oxygen is?? and what its used for?? WE BREATH IT
2006-12-13 20:19:06 · answer #9 · answered by Anonymous · 0⤊ 1⤋
http://informinfo.blogspot.com/
2006-12-13 20:17:47 · answer #10 · answered by sos 1 · 0⤊ 1⤋