Answer:
The amount of matter in a system stays constant, it is not created nor destroyed.
Explanation:
For example, in a situation such as a chemical reaction, the atoms of the molecules never magically appear or vanish. The atoms of the reactants are simply rearranged into a product. Hope this helps.
Answer:
pleura
Explanation:
Thin layer of tissue that protects the lungs
Deoxyribonucleic acid is DNA. This acid is a molecule that carries the genetic
instructions used in the growth, development, functioning and reproduction of all living organisms and viruses.
Answer:
Explanation:
metrics of time (ie. Lightyears)