9.4

Question 1

erosian

Answer 1

the wearing away and removal of soil and rock by natural elements, such as wind, waves, rivers and ice, and by human activity

Question 2

floodplains

Answer 2

flat, open land beside a river where sediments are deposited during floods

Question 3

glaciars

Answer 3

large bodies of ice that move down slopes and push boulders, rocks and gravel in front of them

Question 4

morains

Answer 4

deposit left by movement of a glacier

Question 5

sandstone

Answer 5

a sedimentary rock with medium-sized grains. The sand grains are cemented together by silica, lime or other salts.

Question 6

mudstone

Answer 6

a fine-grained, sedimentary rock without layering

Question 7

shale

Answer 7

a fine-grained sedimentary rock formed in layers by the consolidation of clay

Question 8

slitstone

Answer 8

a sedimentary rock with a particle size between that of sandstone and mudstone

Question 9

conglomerate`

Answer 9

sedimentary rock containing large particles of various sizes cemented together

Question 10

coal

Answer 10

a sedimentary rock formed from dead plants and animals that were buried before rotting completely

Question 11

limestone

Answer 11

a sedimentary rock formed from the remains of sea organisms. It consists mainly of calcium carbonate.