Hot sand cools off faster at night than plants and vegetation. How does the specific heat capacity of sand compare to plants?

a. It is likely the same as that of plants.
b. It is less than that of plants.
c. It is more than that of plants.

Which material does the thermal convection has much to do with? 

a. Insulators
b. Conductors
c. Fluids

Heat comes from the sun to Earth by the process of ?

a. Convection
b. Conduction
c. Radiation

What happen to the length of a strip of iron when its temperature increases?

a. The length of the strip of iron may increase or decrease.
b. The length of the strip of iron increases.
c. The length of the strip of iron decreases.​