Chapter 5 - Lesson 3 Flashcards
1
Q
How long does weathering take?
A
It can take millions of years
2
Q
Moving water can break down
A
rocks
3
Q
When water freezes in a crack,
A
it widens the crack and breaks the rock apart
4
Q
What can also make rocks crack?
A
Roots of a plant or tree that gets into a crack
5
Q
Moving water and wind cause
A
erosion
6
Q
What else can cause erosion?
A
Glaciers. The large piece of ice moves slowly across land and tears the rocks out of the ground.
7
Q
What is a glacier?
A
a large piece of ice that moves across the land
8
Q
How can people change the land?
A
- cut through a mountain to make a tunnel, road or canal
- digging holes and land for useful rocks
- cutting down trees which causes soil to wash away
- people drain ponds and swamps
9
Q
When a pond is drained,
A
dry soil is left and it can blow away
