Answer:
standard condition
Explanation:
The amount of heat energy required to change the state of a substance from a liquid to a solid or from a solid to a liquid.energy that causes molecules to be in motion and to raise the temperature of a substance
<u>Answer:
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The build-up of three oxygen created our ozone layer around two billion years ago.
<u>Explanation:
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- The ozone layer is a part of the stratosphere which is located right after the troposphere in the atmosphere of the Earth.
- The ozone gas is made up of the abundance of three oxygen molecules combining with the ultraviolet radiation emitted by the Sun.
- The development of the ozone layer happened around two billion years ago when the oxygen concentration levels on the planet began to rise slowly and gradually.
Seven countries make up the region of Central America, two of them are Belize and Costa Rica.
Your answer would be D) Stromatolites. hope this helps :)))!
Answer:
don't think you can delete once sent.
Explanation:
