glaciers

Question 1

glaciers and the ice ages

Answer 1

-there have been at least 4 ice ages in the past 2.5 million years
-As large ice sheets advanced over canada they changed into landscape

Question 2

what is glaciation

Answer 2

the process of ice advancing covering large areas of land

Question 3

How do glaciers advance

Answer 3

-glaciers advance when snowfall exceeds melting
-Heat and pressure from the weight of the glacier because a slight melting at the base

-gravity pulls the glacier making “flow”

-glaciation can have erosional (stripping away or removing material) and depositional effects (adding material)

Question 4

Erosional effects of glaciation

Answer 4

-The erosional effects of glaciers are responsible for changing drainage patterns and creating new lakes and streams

Question 5

what are the two categories of depositional effects of glaciation

Answer 5

1. depositing by ice
2. depositing by water

Question 6

Depositonal effects of glaciation by ice

Answer 6

glacial till and Moraines

Question 7

glacial till

Answer 7

debris,such as loose sediments and rocks that are collected and deposited by glaciers

Question 8

Moraines

Answer 8

deposits of till that form at the edges of a glacier which are left behind as glaciers melt

Question 9

Depositional effects of glaciation by water

Answer 9

-the weight and movement of glaciers form lake basins
-As the climate warms ice sheets melt
- water fills the basins creating glacial lakes eg. the great lakes