Before there was oxygen life tended to exist in water as a form of algae which breathed in carbon dioxide and exhaled oxygen like plants. bacteria also existed at underwater thermal vents like the ones they have discovered at the ocean floor.
The earths atmosphere has significantly altered over the years. The process of the earth's atmosphere was recognized and evolved 2.7 billion years ago, forming the nitrogen-oxygen atmosphere that exists today. This change enabled the formation and beginning of the ozone layer (which along with magnetic fields) block solar radiation.
Some three examples of how the atmosphere supports and protects life includes blocking out harmful UV rays from the sun and balancing the carbon dioxide levels. Most life forms need oxygen to survive and this comes from the atmosphere.
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Plants, trees, and grass put oxygen into the air.
Carbon dioxide is being released. As you breathe in you inhale fresh oxygen, but as you breathe out your body releases carbon dioxide.
Yes. Earth's atmosphere is about 21% oxygen. Without it, the vast majority of life we see, including humans, could not exist.
There was no oxygen in the beginning. Plant life developed and released oxygen gas into the atmosphere over a long period of time.If that had never happened, there would not be much if any free oxygen in the atmosphere and aminal life as we know it would never have developed.
oxygen
Earth has an atmosphere because gravity keeps gases from escaping into space. The atmosphere helps regulate temperature, protects against harmful radiation from the sun, and provides the oxygen needed for life to exist.
Oxygen has a diatomic molecule and ozone a triatomic molecule.But also monoatomic oxygen exist.
No, lightning does not require oxygen to exist because it is an electrical discharge that occurs in the atmosphere. Lightning is the result of an imbalance of electrical charges in the atmosphere and is not dependent on the presence of oxygen.
Earth is the planet that has water, oxygen, and regulated temperatures that can support life as we know it. Its atmosphere and location within the habitable zone allow for these conditions to exist.
Yes, oxygen is a naturally occurring element that is essential for life on Earth. It is a colorless, odorless gas that makes up about 21% of the Earth's atmosphere. Oxygen is also found in compounds such as water and carbon dioxide.
Oxygen usually exists as a diatomic molecule, O2, in the Earth's atmosphere.
The oxygen in Earth's atmosphere has been generated, over geological time, by the plant life on Earth.
No life is known to exist there. It is too cold, too dry, and there is very little atmosphere.
There is oxygen in the atmosphere. This lets us breathe.