1. Daily Warm-Up Exercises
Day 6
All igneous rocks form underground.
Is the above statement true or false?
False. Some form on Earth's surface from molten rock that is released when a volcano erupts.
When igneous rock forms underground, is it likely to form faster, slower, or at the same rate as igneous rock that forms on Earth's surface?
Slower. There is extreme heat inside Earth, so molten rock that is trapped underground will cool and harden slowly.
Daily Warm-Up Exercises 1
Daily Warm-Up Exercises 1

2. Igneous & Metamorphic Rocks (Part 1, steps 7-15)
Investigation 8
One Rock to Another

3. 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
Compare Rock Formation 3

4. Igneous Rocks
Extrusive igneous rock forms when lava cools on the surface of the Earth
Called lava on the surface
examples: obsidian, pumice, tuff, scoria, basalt
Intrusive igneous rock forms when magma cools below the surface of the Earth in the crust
example: granite

5. Metamorphic Rocks Metamorphic means “changed”
Rocks that have changed from other types of rock
The change is brought about by pressure and/or heat
Called lava on the surface

6. Metamorphic Rocks Pressure occurs when
Rocks are buried deep in the Earth
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

7. 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

8. (the original rock that changes)
Source and Morph Rocks
All metamorphic rocks form from a source rock
Source Rock
(the original rock that changes)
Morph Rock
Heat and/or Pressure
limestone
marble

9. Source and Morph Results
shale
slate
shale or mudstone
schist
sandstone
quartzite
granite
gneiss