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Oxygen - 3rd Std
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Which State of matter is Oxygen?
Gas
When was Oxygen Created on Earth, and How?
Millions of years ago, tiny creatures called Blue Algae released Oxygen through Photosynthesis
Sometimes we can see Phytoplankton. How can we see it?
Sometimes we see it on the surface of the water as Green Patches
Can Phytoplankton be seen with the Naked Eye?
No, they are too small to be seen with the naked eye
How much Oxygen in the Air is given out by them?
50%
How do Phytoplankton give out Oxygen?
They take in Sunlight, Water and Carbon Dioxide and turn it into Energy through a process called Photosynthesis
Do all the Oxygen we breathe come from Trees?
No, only 20%. Rest comes from Ocean Plants called Phytoplankton
Is Oxygen Visible or Invisible? Is it a Solid, Liquid or a Gas?
Invisible, It is a Gas
is there Oxygen in the Air? How much?
Yes, 21%
What is the Symbol of Oxygen?
O
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