Paragraph: (Science-textbook/science-g4-2.txt)
Sent 1: You may be wondering, how can a glacier get so big?
Sent 2: Why does it move?
Sent 3: These are both good questions.
Sent 4: In the winter months, precipitation falls as snow.
Sent 5: This solid form of water builds up on the ground as long as the temperatures stay cold enough.
Sent 6: As the temperature rises, the snow starts to melt.
Sent 7: The frozen water changes state back into a liquid state.
Sent 8: Nearer the poles, summer does not last very long.
Sent 9: If the summer is long enough and warm enough, all the snow may melt.
Sent 10: This is what typically happens now.
Sent 11: The earth was a little cooler 12,000 years ago.
Sent 12: As a result, during the summer months, that amount of snow did not melt.
Sent 13: It may have only been an inch or so of snow that melted.
Sent 14: The following winter, snow fell on top of this left-over snow.
Sent 15: This next winters snowfall had a head start.
Sent 16: Year after year, the snow that did not melt became thicker and thicker.
Sent 17: Inch by inch the snow started to build up.
Sent 18: Over many years, layer upon layer of snow compacted and turned to ice.

Question: Do glacier's form quickly? (false/0)

No
Yes
No, they take many years to form, as they grow inch by inch at a time

Question: What state must water be in to become snow? (true/1)

Frozen
Liquid
Vapour
Solid

Question: What climate is needed for glaciers to form. (false/2)

Hot
Cold
Warm
Colder weather and shorter summers

Question: How do glaciers form? (false/3)

By accumulation of snow
Layer upon layer of snow compacted and turned to ice
During winter, precipitation falls as snow, and then this solid form of water builds up on the ground as long as the temperatures stay cold enough
By melting of ice
As the temperature rises, the snow starts to melt

Question: Was there snow in summer 12,000 years ago? (true/4)

Yes
Maybe

Question: Are temps always the same in glacier areas? (true/5)

No
Yes
Temperatures rise and fall depending on the time of year

Question: How does the snow turn into ice? (true/6)

By get accumulated and compacted
Layer upon layer of snow compacted and turned to ice
Year after year, the snow that did not melt became thicker and thicker, building up, compacting, and turning into ice
By freezing during summer
As the temperature rose, the snow started to melt

Question: What are two characteristics of glaciers? (true/7)

They are big, they move and they are cold
How it changes state back into a liquid state; how it becomes thicker and thicker
Small and liquid
They can't get so big
Not moving
Big and compact

Question: Why didn't most snow melt in the past? (false/8)

The earth was a little warmer
The earth was a little cooler 12,000 years ago, so it may have only been an inch or so of snow that melted
In past, summer was short
In past, winter was short
The earth was a little cooler

Last updated: Mon Apr 16 04:55:33 EDT 2018
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