"Rock Cycle: Crystal Size Investigation"

Sponge:
1) How do igneous rocks form?
2) How do metamorphic rocks form?

Review yesterday's observations
- Metamorphic rocks used to be other rocks
- Igneous rocks can be extrusive (form on Earth's surface) or instrusive (form inside the Earth)

Demonstrate how crystals form with salol: melt in hot water, form crystals in cold water
- Record observations in a chart on p. 128

Complete crystal size investigation (p. 129)
- Question: Why do some igneous rocks have la...
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"Rock Cycle: Igneous and Metamorphic Rock Observations"

Sponge (p. 114):
1) The correct order of Earth's layers from inside to outside is...
2) ______________ fossils help geologists determine how old a rock is.

Rock cycle notes (p. 124): in a t-chart
- Igneous Rocks:
Form when lava/magma cools and hardens
2 types: extrusive, intrusive
- Metamorphic Rocks:
Form from heat and pressure inside the Earth

Igneous Rock Observations (p. 125)
Metamorphic Rock Observations (p. 127)

Exit Slip:
- One thing I learn...
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"Fossils and Time"

Sponge:
1)
2)

Review index fossils
Complete correlation questions - index fossils in action (p. 113)
Notes: Thinking about Index Fossils (p. 115, 117)

Exit Slip:

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"Fossils and Time"

Sponge:
1)
2)

Review yesterday's assignment:
What is an index fossil?
How do geologists/paleontologists use them to compare rocks?

Finish/check fossil correlations
Fossil Correlation Questions

Exit Slip:

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"Fossils and Geological Time"

Sponge:
1) One thing the geological time scale does is...
2) Why are "Homo sapiens," i.e. us, the only hominids left?

Discussion:
- What did we learn from Walking with Cavemen?

Quick-write:
What do fossils tell us?

Intro to index fossils

Identify index fossils

Exit Slip

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