Answer:
Solar Energy
Explanation:
The reasoning is most of the energy comes from the Sun to support ecosystems and help them grow, such as various plants.
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Answer: It's eaither A. To understand the world around us
OR
B. To solve a problem
Explanation:
TSH level, because if we are testing the levels of TSH with a person who has Hashimoto's disease and one who does not have Hashimoto's disease.
Answer:
Option C. The number of oxygen atoms is the same before and after the reaction.
Explanation:
When hydrogen combine with oxygen, water is formed. According to law of conservation of matter, matter cannot be created nor destroyed during a chemical reaction. So according to this law, the amount of reactants is equal to the amount of product produced after a chemical reaction and the number of oxygen atoms is the same before and after the reaction.