answersLogoWhite

0

The oxygen so characteristic of our atmosphere was almost all produced by plants (cyanobacteria or, more colloquially, blue-green algae). Thus, the present composition of the atmosphere is 79% nitrogen, 20% oxygen, and 1% other gases.

User Avatar

Wiki User

11y ago

What else can I help you with?

Related Questions

What chemical substance is found in the earth but not formed by plants or animals?

Carbon is a chemical substance found in the Earth but not formed by plants or animals.


Which substance is a solid that can be found in earth's atmosphere?

rain


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.


Which addictive chemical substance is found in coffee and colas?

Caffeine is the addictive chemical substance found in coffee and colas. It is a stimulant that can temporarily increase alertness and energy levels.


What is a substance or molecule that forms in a chemical equations?

A substance or molecule that forms in a chemical equation is a product. Products are the result of a chemical reaction between reactants, and they are found on the right side of a chemical equation.


What substance can be found in the atmosphere hydrosphere and lithosphere?

Oxygen is a substance that can be found in the atmosphere, hydrosphere, and lithosphere. It is widely distributed in the Earth's systems and plays a crucial role in supporting life through processes like respiration and photosynthesis.


What is a chemical substance for photosynthesis?

Glucose is one important chemical substance used in photosynthesis. It is used for food, a sugar compound.


The only substance near the earth's surface that is found naturally in the atmosphere as a solid a liquid and a gas?

Water is the only substance found naturally in the atmosphere as a solid (ice crystals in clouds), a liquid (raindrops), and a gas (water vapor).


What are the substances found in selenium?

Selenium is a chemical element. It can be said to be a pure substance; there is nothing else found in it.


What is it called when a substance that is formed during a reaction found on the right side of the arrow in a chemical reaction?

The substance formed during a reaction and found on the right side of the arrow in a chemical reaction is called a product.


What is the chemical substance found in a firefly?

Luciferin, a protein that reacts with oxygen to produce light.


Why does corrosion takes place?

Corrosion is a chemical reaction between metal and some corrosive agent found in the atmosphere, usually oxygen or sulfur dioxide. Iron is a chemically active element, which is usually found as an ore (not counting meteorites); we refine it for our purposes, but in doing so we are creating a chemically unstable substance, in an environment that has a chemically active atmosphere.