Ice-Land Investigators

Question 1 · multiple choice

A glacier moves mainly because thick ice…

Melts completely each hour Floats through soil Has wheels beneath it Deforms and can slide

Question 2 · multiple choice

A U-shaped valley suggests past shaping by…

A single rain shower A glacier A sandstorm only A coral reef

Question 3 · multiple choice

An iceberg is mainly…

Solid ocean mud Frozen pure salt Freshwater ice Compressed seaweed

Question 4 · multiple choice

Long scratches on exposed bedrock can show…

Ancient air temperature exactly Former cloud colour Glacier movement direction Ocean salinity exactly

Question 5 · multiple choice

Which feature is a pile of debris left by glacier ice?

Sand spit Stalactite Lava tube Moraine

Question 6 · multiple choice

Why is much of an iceberg hidden underwater?

Ice is only somewhat less dense than water Salt holds it down magnetically The submerged part is stone Ice has no buoyancy

Question 7 · true false

True or false: Sea ice and a glacier are formed in exactly the same way.

True False

Question 8 · multiple choice

Permafrost means ground that remains frozen for at least…

Two consecutive years One snowstorm One winter night Two daylight hours

Question 9 · multiple choice

Why can darker soot on snow increase melting?

It makes the snow denser only It stops all air movement It increases absorbed sunlight It strengthens ice crystals

Question 10 · multiple choice

An ice core's trapped air bubbles help scientists study…

Ancient birds' songs Past atmospheric composition Exact old wave heights Future earthquake times