Rocks and Minerals

1
Rocks and Minerals

• Review

2
What is a mineral?

• Something in your vitamin pill
• Something natural that is not and never was
  living, and is found in rocks
• Melted rocks

3
Which is not true about rocks?

• All rocks are made of minerals
• Rocks come in different shapes, colors, and sizes
• A rock is always made up of just one kind of
  mineral

4
What are three properties used to identify
minerals?

• Hardness, size, luster
• Hardness, streak, shape
• Hardness, streak, luster

5
When hot, molten rock material cools and hardens,
it becomes

• Basaltic
• Organic
• Igneous

6
Molten materials below Earth's crust is called

• Gneiss
• Magma
• Basalt

7
How do igneous rocks form?

• They form deep underground from heat and pressure
• Melted rocks cool and harden
• Weathering and erosion form them.

8
How are rocks with small grains and fine textures
formed?

• When lava cools quickly as it is exposed to air
• When magma cools slowly below Earths surface
• When water and air are squeezed out of the layers

9
Fire-made is a nickname for

• Igneous rock
• Sedimentary rock
• Metamorphic rock

10
Rocks formed when bits or layers of rocks are
pressed together are called

• Igneous rocks
• Metamorphic rock
• Sedimentary rock

11
How can you tell the relative age of two rocks
from layers of sediment?

• The rock in the lower sediment is the younger
  rock
• The rock in the higher sediment is the younger
  rock
• The larger rock is the younger rock

12
A rock changed by heat, pressure, or both is

• Basaltic
• Igneous
• Metamorphic

13
A process by which rocks are changed from one
type into another is called

• The rock cycle
• The geologic cycle
• The metamorphic cycle

14
What happens when wood or bones become petrified?

• They are frozen in ice
• They decay slowly and leave a carbon footprint
• The once-living parts are filled in by minerals

15
That's All!