Answer:
-A solution is a mixture in which one substance is dissolved in another. When elements and compounds that are dissolved in water leave a solution, crystallization occurs.
Explanation:
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To determine if the cardiovascular system is becoming more fit as a result of fitness program, the resting heart rate should be going slower. Cardiovascular system is the system of the body that allows the circulation and transportation of nutrients, oxygen, hormones, carbon dioxide through out the body. It includes the blood vessels, the lungs, the heart and the blood.
Answer:
the basic unit of a chemical element.
atoms as a source of nuclear energy.
