15. On some occassions, more than half of the moon is dark.
O
a. True
O b. False

This is true because if your read the book it’s tells you

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.

They can measure  the amount of energy gained or lost