More cards in this set

Card 6

Front

the result of widening and deepening of a crack by ground contraction

Back

Preview of the front of card 6

Card 7

Front

this makes hollows deeper by freezing and thawing

Back

Preview of the front of card 7

Card 8

Front

where in the summer meltwater is unable to percolate due to frozen ground,therefore saturates soil which becomes highly mobile

Back

Preview of the front of card 8