9.4

Question 1

rocks formed from sediments deposited by water, wind or ice. The sediments are cemented together in layers, under pressure.

Answer 1

Sedimentary Rocks

Question 2

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

Answer 2

erosion

Question 3

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

Answer 3

floodplains

Question 4

deposit left by movement of a glacier

Answer 4

moraines

Question 5

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

Answer 5

sandstone

Question 6

a fine-grained, sedimentary rock without layering

Answer 6

mudstone

Question 7

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

Answer 7

shale

Question 8

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

Answer 8

siltstone

Question 9

sedimentary rock containing large particles of various sizes cemented together

Answer 9

conglomerate

Question 10

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

Answer 10

Limestone

Question 11

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

Answer 11

Coal

Question 12

a sedimentary deposit formed when a salt lake or seabed dried up. Its main chemical is sodium chloride.

Answer 12

Rock salt