False-- most of the time not enough energy is put into the system, so the compounds or whatever cant break down fully into their elements
8. b
9. c
10.a
all of those can be determined by units
Answer:
1.Physical. People measure water by themselves.
2.Physical. People chop wood.
Explanation:
(this is all I can answer for you. you have to explain it by yourself tho.)
I dont know if I'm correct so you should double check.
Option C. A compound being separated into 2 elements represents a chemical change.
