This is a type of Rock...

1. Rocks
8.3.4 Explain how igneous,
metamorphic, and sedimentary rocks
are interrelated in the
rock cycle.
Students do not need to know the examples of each type of
rock shown in this powerpoint. They are for information only.

2. Each type of rock is
formed differently and
can change from
one type to another
over time.

3. Types of Rocks
Igneous Rocks Metamorphic Rocks
Sedimentary Rocks

4. Sedimentary Rocks
How They are Made
• Forms from the compaction and/or
cementation of rock pieces, mineral grains, or
shell fragments called sediments.
• Sediments are formed through the processes
of weathering and erosion of rocks exposed
at Earth’s surface.
• Sedimentary rocks can also form from the
chemical depositing of materials that were
once dissolved in water.

5. Types of Sedimentary Rocks
Sandstone Limestone
Gypsum Conglomerate
Shale

6. Igneous Rocks
What are They?
• · Forms when molten rock (magma) cools
and hardens.
• · If cooling takes place slowly beneath
Earth’s surface, the igneous rock is called
intrusive.
• · If the cooling takes place rapidly on
Earth’s surface, the igneous rock is called
extrusive.

7. Types of Igneous Rocks
Granite Scoria
Pumice Obsidian

8. Metamorphic Rocks
What are They?
• Forms when rocks are changed into different kinds
of rocks by great heat and/or pressure.
• They are heated, squeezed, folded, or chemically
changed by contact with hot fluids.

9. Types of Metamorphic Rocks
Schist Gneiss

10. Rock Cycle
• The rock cycle is an ongoing process.
• It is a series of natural processes that can
change rocks from one kind to another.
Check out the diagram on the
next slide!

11. Rock Cycle

12. Rocks
8.3.4 Explain how igneous,
metamorphic, and sedimentary rocks
are interrelated in the
rock cycle.

13. Thank you!!!