Water

Question 1

Sea ice

Answer 1

Ice formed when water in oceans is cooled to temperatures below its freezing point. (Doesn’t raise sea levels when melts)

Question 2

Ice sheets

Answer 2

Masses of glacial land ice water extending more than 50,000km2

Question 3

Ice caps

Answer 3

Thick layers of ice on land that are smaller than 50,000km2

Question 4

Permafrost

Answer 4

Permanently frozen thick subsurface layer of soil.