How is the surface water above a deep trench in the ocean floor distorted as a result of the trench?
a. Downward distortion
b. Upward distortion
c. Sideways distortion
d. Vortex distortion
e. No distortion
Question 2What do satellites measure that provides data for seafloor topographical mapping?
a. Pings reflected from seabed
b. Sea surface height
c. Sound pulses from ships
d. Seawater density
e. Wave energy