8. When air particles in the atmosphere are heated, the temperature increases. Does
increase in its temperature cause increase in its density?
A. No, because the higher temperature of air the lesser its density.
B. No, because the density of air is not affected by its temperature at all.
C. Yes, because the density of air will increase if its temperature increases too.
D. Yes, because the density and temperature of air are directly related to each
other.
9. What happens when air is heated?
A. Stays in place
B. Expands, then rise
C. Spreads in all direction
D. Moves toward a lower elevation​