The illustration shows information about how an igloo is built from snow. Summarise the information by selecting and reporting the main features and make comparisons where relevant.

The pictures show the different steps involved in constructing an

igloo

.

Overall

, there are 5 main steps in building an

igloo

, beginning with finding hard-packed

snow

and ending with cutting ventilation holes in the wall and roof of the finished

igloo

. Using

a

Remove the article

apply

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snow

saw,

blocks

are cut in hard-packed

snow

. Large

blocks

are used for the base.

Next,

the edges of the

blocks

are smoothed and placed to form a circle.

Then

, an entrance is made by digging a hole under the circular wall. The

last

opening on the top is filled with a large block, carefully cut to the exact size. After that,

snow

is thrown on the

igloo

and packed into all the crevices or gaps. Inside the

igloo

, the walls are smoothed by hand.

Next,

the entrance is built and the hole is covered with

snow

blocks

.

Finally

, ventilation holes that allow air to enter are cut

in

Change preposition

into

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the walls and roof, and the

igloo

is finished.