Answer:
Decomposition
Explanation:
According to the carbon cycle when organisms die they decompose and release carbon.
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_______________ reactions transfer energy to the surroundings, usually as heat.
C. Exothermic
Answer:
Hydrogen gas has the highest calorific value of 150 KJ/g among all the fuels. So, hydrogen gas is considered to be an extremely good fuel.
Explanation:
The correct answer is A. Recording the sounds of a test tube breaking
