Answer:
Lets say you are running in P.E. If you run for to long you get tired. When you are tired you run out of energy and cant run anymore.
Explanation:
Isotopes are atoms of the same element that have the same number of nucleic protons, but different numbers of nucleic neutrons. This has the effect that they have a different mass number. However they have the same atomic number because that is a measure of how many protons are in the nucleus
Hope this helps!
-Payshence xoxo
Answer:
older, older
Explanation:
Fossils deeper in the ground are older.
1. proteins
2. essential
3. nonessential
hope this helps!!
The answer is the nervous system.
Hope this helps!
