Çsecondary waves cannot travel through
a. rock.
b. liquids.
c. earth’s mantle.
d. earth’s crust

If the distance between two points on the ground is 10 miles and the distance between the same two points on a map is 4 inches, what is the map scale expressed as a ratio?

Dubai is challenged by all of the following environmental factors except a. a warm and dry climate b. a lack of annual rainfall c. scarce freshwater resources d. a lack of valuable natural resources

The process by which liquid water changes into water vapour is called what ?