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Flashcards in Interglacial And Glacial Periods Deck (16):
1

How much of the earths surface is covered in ice?

10 per cent

2

Name the three forms of ice

Glaciers, ice caps and ice sheets

3

When does ice spread out?

During glacial periods

4

When does ice get smaller?

In warmer interglacial periods

5

What is a large mass of ice that flows like a river, flowing very slowly called?

A glacier

6

Under what force does a glacier move by?

Gravity

7

What is a thick layer of ice called?

An ice sheet

8

How many square kilometres can an ice sheet cover up to?

50,000 sq km

9

What areas are ice found in today?

Highland areas

10

How do glaciers form?

They are developed over a long period of time where snow has fallen but not melted, the snow compacts into ice. The weight of the snow and ice means that the glacier starts to slip down mountains sides over time.

11

How long does it take glaciers to form?

Years

12

What's an ice age?

An extended period of time where it gets cold

13

What's a quaternary?

The last 2.6 million years of geological time

14

What's a glacial period?

A period of time lasting 80,000 to 100,000 years

15

What's an interglacial period?

A warm period of time lasting 10,000 to 15,000 years

16

What cycles cause this?

The Milankovitch cycles