3. What is the primary difference between a molecule and a
compound?
A. All molecules are compounds,
but not all compounds are
molecules
B. Molecules always contain only
one type of atom, unlike
compounds
C. Compounds must be composed
of more than one type of atom
D. Molecules must be composed of
more than one type of atom

This is important 1. what happens to the speed of molecules in water vapor when it condenses to form a liquid? (2 points) the molecules slow down. the molecules speed up. the molecules slow down and then speed up. the molecules speed up and then slow down. 2. how might human activities change to compensate for a decrease in water supplies? (2 points) humans might build a factory. humans might build drainage systems. humans might extract more water from the ground. human behavior does not change because of the water cycle. i'll be grateful if anyone can answer these 2 questions !