Glaciers
Paragraph 1: Accumulation of
snowfalls c itself into glacial ice over decades. When it
starts moving, it is called a glacier.
Paragraph 2: Glaciers move very ly. A typical glacier advances
about 200 yards a year. The s s occur when thermal energy melts the lower
layer of ice and the water pressure builds up.
Paragraph 3: More than
three-quarters of the earth’s f is held in the form of ice and some of it melt
every spring and summer, to be used for many purposes such as agriculture,
energy, and drinking water. Norway and Switzerland depend on melt water from
glacier for most of their e
power.
Paragraph 4: Glaciers are found in
many places in many forms. Some are in areas carved out of mountainsides by ice
e or on exposed slopes. Some flow down valleys
and some of them fill many adjoining valleys, leaving only the highest peaks
and r . In Greenland and
Antarctica, ice s cover the vast land areas.
Paragraph 5: There are about
200,000 glaciers on the earth. In the Unites States, few glaciers are left
outside of A , where
there are approximately 2,900 square miles of glacial ice and tourism provides
all kinds of activities such as v
glacier from the air or the
ocean, walking on the glacier, or paddling amidst the glacier flows.
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