Download Day 6

Day 6
All igneous rocks form underground.
Is the above statement true or false?
Explain.
False. Some form on Earth's surface
from molten rock that is released
when a volcano erupts.
Daily Warm-Up Exercises
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Igneous & Metamorphic Rocks
(Part 1, steps 7-15)
Investigation 8
One Rock to Another
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Layers of the Earth
Inner Core:
•At the center of the Earth
•Solid iron and nickel
Outer Core:
•Surrounding the inner core
•Molten iron and nickel
Mantle:
•Between the crust and core
•The most massive part of Earth
•Lower part is a soft (plastic) solid
Crust:
•The thin outer surface of the Earth
•The part we stand on
•If Earth were an egg, the crust would be the shell
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Igneous Rocks
Extrusive igneous rock forms when lava cools
on the surface of the Earth Called lava on the
surfacetuff, scoria,
examples: obsidian, pumice,
basalt
Intrusive igneous rock forms when magma cools
below the surface of the Earth in the crust
example: granite
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Metamorphic Rocks
• Metamorphic means “changed”
Called
lava on
the
• Rocks that have changed
from
other
surface
types of rock
• The change is brought about by
pressure and/or heat
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Metamorphic Rocks
Pressure occurs when
1. Rocks are buried deep in the Earth
2. Magma pushes up from below
Heat occurs when rocks are covered
with magma
Heat and Pressure result when
rocks are pressed down close
to magma
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Metamorphic Rocks
When rocks get so hot that they melt, they turn
into magma
If magma resolidifies, it is a new igneous rock
Metamorphic rocks never
completely melt
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Source and Morph Rocks
All metamorphic rocks form from a source rock
Source Rock
Morph Rock
(the original rock that changes)
Heat and/or
Pressure
limestone
marble
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Source and Morph Results
Source
Morph
shale
slate
shale or mudstone
schist
sandstone
quartzite
granite
gneiss
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Essay Question
What forces are constantly shaping and
reshaping Earth’s surface? (Hint:
constructive/ destructive)
Earth processes are going all the time.
Destructive processes break down
landforms. These include weathering,
erosion, and tectonic plates sinking and
melting. Constructive processes build
up. They include mountain building,
deposition (sedimentation), and new
crust formation.
Daily Warm-Up Exercises
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