Topic 9 rocks

Question 1

Minerals

Answer 1

Substances the forms rocks. Every mineral has its own chemical makeup.

Question 2

lithosphere

Answer 2

The outer layer of the earth includes the crust and the mantle

Question 3

Magma

Answer 3

A hot combination of molten rock and gases, just underneath the earths surface that has come from the mantle.

Question 4

Sediments

Answer 4

Materials broken down by the weather and erosion that’s been moved by the wind or water and collects in layers

Question 5

Native elements

Answer 5

Elements that aren’t combined in the earths crust

Question 6

Crystals

Answer 6

Geometrical- shaped substance made up of atoms and molecules arranged in one of seven different shapes. The elements the make up a crystal and the conditions that are happening during the growth of the crystal determines the arrangement of the atoms and molecules and also the shape of the crystal.

Question 7

Lustre

Answer 7

The look of a mineral caused by the way it reflects light. A mineral can appear glassy, waxy, metallic, dull, pearly, silky or brilliant

Question 8

Streak

Answer 8

The color of a mineral as a powder. By rubbing it onto an unglazed white ceramic tile.

Question 9

Hardness

Answer 9

How difficult it is to scratch the surface of a solid material. The hardness rating of a mineral is chosen by comparing with the other standard minerals. Diamond has a hardness rating out of 10 and can scratch other minerals with a lower hardness rating