Flashcards in Interglacial And Glacial Periods Deck (16):
How much of the earths surface is covered in ice?
10 per cent
Name the three forms of ice
Glaciers, ice caps and ice sheets
When does ice spread out?
During glacial periods
When does ice get smaller?
In warmer interglacial periods
What is a large mass of ice that flows like a river, flowing very slowly called?
Under what force does a glacier move by?
What is a thick layer of ice called?
An ice sheet
How many square kilometres can an ice sheet cover up to?
50,000 sq km
What areas are ice found in today?
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.
How long does it take glaciers to form?
What's an ice age?
An extended period of time where it gets cold
What's a quaternary?
The last 2.6 million years of geological time
What's a glacial period?
A period of time lasting 80,000 to 100,000 years
What's an interglacial period?
A warm period of time lasting 10,000 to 15,000 years