1. Rocks 3.1 The rock cycle shows how rocks change. 3.2
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Rocks
the BIG idea
Rocks change into other rocks over time.
3.1
The rock cycle shows how rocks change.
3.2
Igneous rocks form from molten rock.
3.3
Sedimentary rocks form from earlier rocks.
3.4
Metamorphic rocks form as existing rocks change.
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2. 3.1 The rock cycle shows how rocks change.
Processes at Earth's surface and heat within Earth cause rocks to change into other types of rocks.
rock
rock cycle
sediment
magma
sedimentary
metamorphic
igneous
igneous rock
sedimentary rock
metamorphic rock
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3. 3.1 The rock cycle shows how rocks change.
Processes at Earth's surface and heat within Earth cause rocks to change into other types of rocks.
rock
rock cycle
igneous rock
VISUALIZATION
Explore how rocks form and change.
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sedimentary rock
metamorphic rock
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4. Igneous rocks form from molten rock.
3.2
Igneous rocks form from molten rock.
As molten rock cools, minerals crystallize and form igneous rocks.
intrusive igneous rock
extrusive igneous rock
igneous
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5. Igneous rocks form from molten rock.
3.2
Igneous rocks form from molten rock.
As molten rock cools, minerals crystallize and form igneous rocks.
intrusive igneous rock
extrusive igneous rock
Extrusive igneous rocks cool quickly at Earth's surface.
Intrusive igneous rocks cool slowly within Earth.
VISUALIZATION
Explore an animation showing how crystals form as molten rock cools.
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6. Sedimentary rocks form from earlier rocks.
3.3
Sedimentary rocks form from earlier rocks.
Layers of sedimentary rocks form as
sediment
• sediments are pressed or cemented together
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7. Sedimentary rocks form from earlier rocks.
3.3
Sedimentary rocks form from earlier rocks.
Layers of sedimentary rocks form as
sediment
• sediments are pressed or cemented together
• dissolved minerals re-form as water evaporates
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8. Metamorphic rocks form as existing rocks change.
3.4
Metamorphic rocks form as existing rocks change.
Metamorphic rocks form as the structure of the parent rocks change and as their minerals recrystallize.
metamorphism
recrystallization
foliation
shale
schist
heat and pressure
Nit-picky, but the green-gray arrow (prior to and proceeding animation) has a line btw the head and tail. Could bring the two portions together so there is no line? (I can’t figure out how to get down to that arrow…)
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9. 3.1 The rock cycle shows how rocks change.
I. The rock cycle shows how rocks change.
rock
A. Most rocks are made of minerals.
rock cycle
B. Our world is built of rocks.
igneous rock
C. Rocks change as they move through the rock cycle.
sedimentary rock
1. Rock Types
metamorphic rock
2. Rocks in the Crust
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KEY CONCEPT
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10. Igneous rocks form from molten rock.
3.2
Igneous rocks form from molten rock.
II. Igneous rocks form from molten rock.
intrusive igneous rock
A. Magma and lava form different types of igneous rocks.
extrusive igneous rock
1. Origin of Igneous Rocks
2. Textures of Igneous Rocks
3. Composition of Igneous Rocks
B. Igneous rocks make long-lasting landforms.
1. Intrusive Rock Formations
2. Extrusive Rock Formations
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11. Sedimentary rocks form from earlier rocks.
3.3
Sedimentary rocks form from earlier rocks.
III. Sedimentary rocks form from earlier rocks.
sediment
A. Some rocks form from rock particles.
1. Forming and Transporting Rock Particles
2. Forming Loose Sediment into Rocks
B. Some rocks form from plants or shells.
1. Coal
2. Limestone
C. Some rocks form when dissolved minerals
re-form from water.
D. Sedimentary rocks show the action of wind and water.
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12. Metamorphic rocks form as existing rocks change.
3.4
Metamorphic rocks form as existing rocks change.
IV. Metamorphic rocks form as existing rocks change.
metamorphism
A. Heat and pressure change rocks.
recrystallization
B. Metamorphic changes occur over large and small areas.
foliation
1. Change over Large Areas
2. Change over Small Areas
C. Most metamorphic rocks develop bands of minerals.
1. Foliated Rocks
2. Nonfoliated Rocks
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