Page 16 - 新思维科学活动用书2 样章
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1.4 Rocks and the environment
Practice
We dig rocks from the Earth in different ways.
2 Use these words to complete the sentences.
machines rocks stones
a This is a quarry.
On the surface workers use
diggers and explosives to
break up the .
Limestone is a rock we dig up
in quarries.
b This is a mine.
Underground workers break
the rock with explosives,
tools and .
Coal is a rock we dig up in
mines.
c This is a riverbed where
workers dig out sand,
rocks and .
Sand, rocks and stones are
used for building.
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