1.) How will the rising of a hot air balloon in cold air be different then if it rises in warm air? a.)It will rise faster in cooler air

b.) It will rise more slowly in cooler air

c.) There will be no difference

d.) It will sink in cool air and rise in warm air

2.) The average kinetic energy of the molecules in a substance is correctly referred to as:
a.) heat
b.) density
c.) temperature
d.) solubility

3.) The average kinetic energy of the molecules in a substance refers to its:
a.) heat
b.) temperature
c.) momentum
d.) viscosity