Tough Stuff: Homework

The Mohs scale measures:

• the quality of diamonds

• the size of minerals

• the hardness of minerals

• the weight of diamonds

Diamonds are made from:

• gypsum

• carbon

• lead pipes

• talcum

By the time a diamond reaches the Earth's surface,

• it has turned into carbon

• a volcano will be formed

• it will have become a gem

• it will be billions of years old

A mineral can scratch any other mineral that is listed below it on the Mohs scale.

• True

• False

Diamonds are measured in grams.

• True

• False

A mineralogist is someone who sells diamonds.

• True

• False

Most diamonds are used in jewelry.

• True

• False

Diamonds are brought up to the surface by special volcanoes.

• True

• False

Without pressure and heat, diamonds will not be formed.

• True

• False

The hardest natural substance on Earth is gypsum.

• True

• False