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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.
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What is the definition chemical energy?
as you no chemical is the combination of two or more substance that is chemical energy is a energy found when there is chemical reaction
What describes a chemical property of a substance?
The ability of a substance to undergo a chemical change is called the Chemical activity of a substance.
Is fluorine a physical of chemical substance?
Fluorine is a chemical substance - a halogen.
Is oxidizing a chemical or physical property?
It is a chemical because it is producing a new substance.
What are characteristics that describe the ability of a substance to form a new substance?
Chemical change or chemical reaction describes how a substance can form a new substance.
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.
What is the definition chemical energy?
as you no chemical is the combination of two or more substance that is chemical energy is a energy found when there is chemical reaction
Which addictive chemical substance is found in coffee and colas?
Easy. Caffeine.
What ultraviolet radiation is blocked from reaching the earth's surface by what substance found in the atmosphere?
ozone
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.
Are non-green plastids capable of directly manufacturing the chemical substance found there?
no
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.
What is the chemical substance found in a firefly?
Luciferin, a protein that reacts with oxygen to produce light.
The only substance near the earth's surface that is found naturally in the atmosphere as a solid a liquid and a gas?
Water
What describes a chemical property of a substance?
The ability of a substance to undergo a chemical change is called the Chemical activity of a substance.
