The skeleton is covered by muscles, whose function is to permit movement and maintain posture. Which of the following IS NOT a function of the muscles? (A)functions to move parts of the body (B)control the movement of broken down food through the stomach (C)functions to produce blood cells (D)controls the movement of blood and oxygen through the heart

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint