Fill in the blanks with an appropriate preposition.

Glaciers are the huge masses …………….. (of / off / on) ice that survive year ……………. (on / to / by) year. They flow slowly ……………… (across / over / through) lands. Glaciers are usually found at high altitudes and latitudes where large amounts of snow build ……………. (out / up / to) and freeze …………….. (into / in / up) ice.

 Glaciers are normally classified …………….. (at / in / into) four categories. Mountain glaciers (also called valley glaciers) are moving ice sent out ……………… (with / by / through) mountain snowfields. Piedmont glaciers occur only at high latitudes. Ice caps are dome-shaped glaciers. They spread ………………. (in / out / on) horizontally in all directions and cover mountains and valleys. Continental glaciers are huge ice sheets that may break ………………… (off / of / over) to form icebergs. The only existing continental glaciers are the ice sheets ………………. (on / of / from) Greenland and Antarctica .

 Answers

Glaciers are the huge masses of ice that survive year to year. They flow slowly over lands. Glaciers are usually found at high altitudes and latitudes where large amounts of snow build up and freeze into ice.

Glaciers are normally classified into four categories. Mountain glaciers (also called valley glaciers) are moving ice sent out by mountain snowfields. Piedmont glaciers occur only at high latitudes. Ice caps are dome-shaped glaciers. They spread out horizontally in all directions and cover mountains and valleys. Continental glaciers are huge ice sheets that may break off to form icebergs. The only existing continental glaciers are the ice sheets of Greenland and Antarctica.