Answer:
The average atomic mass (sometimes called atomic weight) of an element is the weighted average mass of the atoms in a naturally occurring sample of the element.
Explanation:
please give me a heart. anyone good at math just posted my question
Answer:
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A hypothesis is an educated guess. This is part of the scientific method developed in science to explain natural phenomena in the environment. Usually scientists use the hypothesis in their controlled experiments.
Whether it is a fact or not scientists use the hypothesis as a basis or a starting point for further explanations. This is known as the scientific hypothesis. When an educated guess yields the same results over time, the answer is called a theory. Something that is widely accepted but still needs to be proven and investigated further.
The question is somewhat confusing. I would choose "none of the above" because none of the choices are blood vessels. However, the heart is the pump that moves blood through the network of blood vessels that distribute and collect materials throughout the body.
