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Our atmosphere allows oxygen to stay in and keeps space out. We have fresh and salt water. Plants and aminals have adapted to live in almost every circumstance. Basically, we have air and water.
Humans need oxygen to undergo aerobic respiration.
magnets
No the atmosphere does not allow heat to escape quickly to cool the planet
They're commonly called 'greenhouse gasses'.
No
biotonic gas
photosynthesis takes carbon dioxide out of the atmosphere and recycles it to make oxygen. that is why trees are very important to the earth
The oxygen in the atmosphere is the O-Zone which is O3 (Oxygen 3) because of plant life oxygen had increased via photosynthesis, the incease just allowed the ozone to thicken, but sadly due to CFC there are large holes
Stomata
The majority of oxygen in the atmosphere come from photosynthesis. Aquatic Cyanobacteria (blue green algae) were the first known organisms to use photosynthesis, before there were land plants. The by product of photosynthesis is oxygen. This increase in oxygen eventually allowed organisms to use respiration as a method of energy production. Thus it allowed for land animals.
Any suddenly opening appearing in the skin of the spacecraft would allow the atmosphere inside the craft to escape out into space - causing decompression.
Fish extract dissolved oxygen from the water by passing the water through their gill slits. Inside the gills is very thin tissue that can 'grab' oxygen right out of the water and put carbon dioxide waste into the water.
the chip escape route
If both t etap water and the distilled water are open to the air and both have dissolved oxygen then the iron nail will rust faster in tap water. Rusting requires dissolved oxygen and goes faster if there are dissolved salts.