Which of the following is NOT true about mass movements?

Some mass movements are too slow to be seen.
Mass movements always lead to landslides.
Gravity is the driving force behind all mass movements.
Mass movements are always downslope.

Question

Which of the following is NOT true about mass movements?

Some mass movements are too slow to be seen.
    Mass movements always lead to landslides.
    Gravity is the driving force behind all mass movements.
    Mass movements are always downslope.

msmr · Answer

The second line is false because mass movements such as creep or slump do not have to lead to landslides.