8Ha - Rocks & Their Uses

Sinkholes form when granite dissolves water in the ground

• True

• False

Answer explanation

Granite is not permeable so water cannot dissolve it

The compounds in rock are called minerals

• True

• False

Answer explanation

The hardest mineral in the world is a diamond

The texture of a rock describes the shapes and sizes of its grains

• True

• False

Answer explanation

Rocks with large, round grains will have a rough texture

Rocks with interlocking grains are porous

• True

• False

Answer explanation

There are no spaces between interlocking grains for water to get in

Granite has rounded grains

• True

• False

Answer explanation

It has been estimated that granite has been around for as long as 300 million years, making it one of the oldest rocks in existence.

Sandstone is porous

• True

• False

Answer explanation

Sandstone has rounded grains so water can fit between the gaps

Sandstone has interlocking grains

• True

• False

Answer explanation

Sandstone has rounded grains

Permeable rocks allow water to run through them

• True

• False

Answer explanation

Definition:

Permeable - (of a material or membrane) allowing liquids or gases to pass through it

Cement is made using limestone

• True

• False

Answer explanation

Perhaps the earliest known occurrence of cement is from twelve million years ago. A deposit of cement was formed after an occurrence of oil shale located adjacent to a bed of limestone burned by natural causes.