2. What is a Rock?
The material that forms Earth’s hard
surface (crust)
3. Essential Questions
How are rocks and minerals different?
Rocks can be made from various minerals and
other materials, while minerals must have a
definite composition.
What are the three types of rocks?
Igneous - sedimentary - metamorphic
How are rocks formed?
Rocks are made from mixtures of minerals and
other materials.
4. Sedimentary Rock
Definition
A type of rock that forms when particles
from other rocks or the remains of plants
and animals are pressed and cemented
together.
5. Sedimentary Rocks
FACTS
Fours steps to be formed
Erosion
Deposition
Compaction
Cementation
Examples:
Limestone, sandstone, shale
6. Igneous Rocks
Definition
A type of rock that forms from the cooling
of molten rock at or below Earth’s surface
~ “ignis” means fire in Latin
7. Igneous Rocks
Facts
Can be “intrusive” forms Inside earth’s
interior
Can be “extrusive” forms on top of
earth’s surface (Exterior)
Forms from cooled magma or lava
Examples
Granite, basalt, pumice
8. Metamorphic Rock
Definition
A type of rock that forms from an existing
rock that is changed by heat, pressure or
chemical reactions
9. Metamorphic Rock
Facts
Form deep below earth’s surface
Any type of rock can eventually “morph”
into a metamorphic rock
Examples
Marble, slate
