1. Which of the following processes is strongly influenced by gravity?
a. the flow of groundwater.
b. the movement of landslides and debris flows.
c. the movement of water in streams.
d. all of these are strongly influenced by gravity
2. What is the relation between earthquakes and landslides?
a. Earthquakes always trigger landslides.
b. Earthquakes sometimes trigger landslides.
c. Earthquakes never trigger landslides.
d. Landslides sometimes trigger earthquakes.
3. Which of the following can trigger a landslide?
a. an earthquake
b. a heavy rainstorm
c. removal of material from the base of a slope
d. all of these