No
Yes
No, they take many years to form, as they grow inch by inch at a time
Do glacier's form quickly?
Frozen
Liquid
Vapour
Solid
What state must water be in to become snow?
Hot
Cold
Warm
Colder weather and shorter summers
What climate is needed for glaciers to form.
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
How do glaciers form?
Yes
Maybe
Was there snow in summer 12,000 years ago?
No
Yes
Temperatures rise and fall depending on the time of year
Are temps always the same in glacier areas?
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
How does the snow turn into ice?
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
What are two characteristics of glaciers?
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
Why didn't most snow melt in the past?
You may be wondering, how can a glacier get so big? Why does it move? These are both good questions. In the winter months, precipitation falls as snow. This solid form of water builds up on the ground as long as the temperatures stay cold enough. As the temperature rises, the snow starts to melt. The frozen water changes state back into a liquid state. Nearer the poles, summer does not last very long. If the summer is long enough and warm enough, all the snow may melt. This is what typically happens now. The earth was a little cooler 12,000 years ago. As a result, during the summer months, that amount of snow did not melt. It may have only been an inch or so of snow that melted. The following winter, snow fell on top of this left-over snow. This next winters snowfall had a head start. Year after year, the snow that did not melt became thicker and thicker. Inch by inch the snow started to build up. Over many years, layer upon layer of snow compacted and turned to ice. 