1. The Rock Cycle
Weathering and erosion, which are external processes, produce the sediment from which sedimentary rocks form.

2. Igneous Rock DID YOU KNOW?
Igneous is derived from the Latin ignis, meaning fire.
Most of the seafloor is made of Basalt an EXTRUSIVE (Volcanic) IGNEOUS ROCK

3. Igneous – Formed from the cooling of molten rock

4. Igneous Rock Intrusive- IR that form from the cooling
of magma inside the Earth.
LARGE CRYSTALS=SLOW COOLING
Extrusive-IR that form at the Earth’s
Surface.
SMALL CRYSTALS=FAST COOLING

5. Lava
Extrusive
Lava
Lava
Intrusive
Magma

6. Sedimentary Rocks

7. Sedimentary Rocks DID YOU KNOW?
75% of rocks exposed at Earths surface are sedimentary
Sedimentary rocks form in various regions
oceans, lakes, rivers, beaches
glaciated areas
deserts

8. Sedimentary Rock
Sedimentary – Formed in layers as a result of pressure on sediments (small pieces of rock)

10. Sedimentary Rocks Form By Three Main Processes
Compaction- Sediments get compressed and
compacted.
Cementation-Small crystals precipitate and act as glue that holds the rock together.
Precipitation-Crystals precipitate directly from solution.

11. Metamorphic Rocks

12. Metamorphic Rocks DID YOU KNOW? Metamorphism means of changed form
Metamorphic rocks form under high temperature
and pressure

13. Metamorphic – Formed from older “parent rock” (either igneous or sedimentary) under intense heat and/or pressure far beneath the earth’s surface.

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