Monday, March 3, 2008

"Igneous Rock Observations"

Bellwork:
1) The correct order of Earth’s layers from inside to outside is…
2) _________ fossils help geologists determine the age of rock layers.
3) Erosion, deposition, and compaction create __________________ rocks.

- Discuss rock layers and where magma comes from
- Record notes on workbook page 116:
2 main kinds of igneous rock:
1) Extrusive igneous rock: forms OUTSIDE the Earth on the surface; cools quickly, has SMALL crystals
2) INtrusive igneous rock: forms INSIDE on the Earth; cools slowly, has LARGE crystals
Metamorphic rock: other rocks transform into it because of heat and pressure
- Observe igneous rocks and record observations on workbook page 117
- Exit Slip: Record one thing you learned about igneous rocks today