C because a compound is a substance made of at least two atoms bonded together
Answer:this air polluction here.
Explanation:
air and soil polluction
Thus, it was found that the intestinal microbiota has approximately 100 trillion bacterial cells - about ten times more than the total number of cells in the human body.
Answer:
Dissolving sugar in water, burning paper, and melting gold are all chemical changes
Explanation:
The action cannot be reversed, or undone. Therefore it is a chemical change.
Boiling water is a physical change.
Answer:
A
Explanation:
the average kinetic energy of all the atoms or molecules of that substance.
