0
Certain minerals oxidize, or rust, in the presence of free oxygen. Proterozoic red beds are sedimentary rocks deposits that contain oxidized iron. They are the evidence that there was free oxygen in the atmosphere during the Proterozoic.
Wiki User
∙ 10y ago
Add your answer:
Earn +20 pts
How are nitrogen and oxygen alike?
They're both diatomic molecules, I.e. They only exist as N2 or O2, and are unable to exist as just O or just N. They are also both gases in our atmosphere and essential to all life
What are the three most important dissolved gases in seawater?
1. Nitrogen. (It makes up 78% of the atmosphere) 2. Oxygen (21%) 3. Argon (1%) The local atmosphere may contain various amounts of water vapor by mass.
What kind of organism can exist both oxygen and oxygen-less environment?
facultative anaerobe
What would happen if oxygen did not exist?
Life on Earth, or at least most of it, would not exist without free oxygen. It is possible that some other form of life, based on another element, could exist in a non-oxygen environment. But none has been discovered as of now.
Where is carbon most abundent?
No, the most abundant element on earth by mass is oxygen.
Can you name the gas that exist in the atmosphere that we cant live with out?
oxygen
Is oxygen found outside earths atmosphere?
Yes. Earth's atmosphere is about 21% oxygen. Without it, the vast majority of life we see, including humans, could not exist.
Did organisms that require oxygen exist before photosynthetic organisms?
It would be impossible for oxygen requiring organisms to exist before photosynthetic organisms because there was not oxygen in the atmosphere for these organisms to breathe. Photosynthetic organisms take carbon dioxide and water in and create oxygen as waste. Before these photosynthetic organisms existed there was not enough or any oxygen in the atmosphere for organisms requiring oxygen to survive.
How can humans exist on earth and not on any other planet?
The atmosphere retains oxygen which humans need given off by plants and regulates the temperature at survivable levels during both day and night.
Why did photosynthetic plants not yet exist the early atmosphere of Earth?
Because there was almost no free oxygen for the plants to photosynthesize with.
How is oxgen from the atmosphere important?
It is important because without it, there can be no living thing. Living organisms need oxygen to exist.
Does oxygen exist in mars?
Yes, there are trace amounts of oxygen in Mars's atmosphere (less than 1%), and huge amounts of carbon dioxide and water ice that can both be processed into oxygen.
When the atmosphere did not have oxygen where did life exist?
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.
Chemical substances in the atmosphere exist as a?
Chemical substances such as nitrogen, oxygen, argon are a mixture that are found in the atmosphere. Carbon dioxide and water are also found depending on the climate and altitude.
What would have happened to the animals if there was no oxygen from the beginning?
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.
What caused te Earth's atmosphere to exist?
What caused the Earth's atmosphere to exist?
Why did miller and Urey try to keep oxygen out of their equipment?
Oxygen did not exist in the early atmosphere. Early life took in carbon dioxide and sunlight, exhaling oxygen as a waste gas. After a few million years, this waste gas became a significant part of the atmosphere, enough so that new opportunistic species could use it for respiration.
