1) Quarrying is extracting rock and stone a) from under the ground b) from the surface 2) Opencast is extracting minerals from a) under the ground b) the surface 3) Quarrying and opencast mining a) leave a large hole in the ground b) are much more dangerous than deep mining 4) Rocks and minerals are ____________________ to extract when they outcrop on or near the Earth's surface.  a) expensive and difficult b) cheap and easy 5) Minerals are ______________ to extract when they are located too deep for surface mining. a) cheaper and easier b) more expensive and more difficult 6) The first stage in searching for minerals underground is to a) undertake a careful geological survey b) sink a deep mine 7) Deep mining involves a) breaking up and loosening rock on the surface b) making a horizontal tunnel 8) Deep mining can be dangerous because a) miners can be hit by trucks b) tunnel roofs collapse from time to time

Types of mining

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