Science WOrkbook pg. 147

Study GuideFill in the blanks. 1. A huge sheet of ice that stays frozen all year is called a glacier.2. The rapid downhill movement of a large amount of soil and rocks is called a landslide.3. A sudden downhill movement of a large amount of snow and ice is called an avalanche. 4. Glaciers can pick up sediment and rocks.5. Glaciers can cause hill called moraines.6. Glaciers can cause U-shaped valleys where ponds and lakes form.7. Two kinds of sudden erosion caused by gravity are landslide and avalanche. List two ways the activities of people can cause erosion.