Thursday, January 10, 2008

"Rock Cycle Activity"

Bellwork:
1) ______________ rock is made when lava cools and hardens.
2) Igneous and sedimentary rock can change into ________________ rock.
3) _______________ rock is found in layers.

- Review the 3 types of rock: igneous, sedimentary, metamorphic
- Rock cycle simulation: use crayon shavings to create sediments, use pressure to create sedimentary rocks, melt the sedimentary rock to make magma for igneous rock, and use heat and pressure to create metamorphic rock

Notes:
- A) Igneous rock:
Lava cools and hardens into igneous rock
Ex: Basalt, pumice, and granite
- B) Sedimentary rock:
Sediments (broken bits of rock, dead plants and animals, chemicals) pile up, and the pressure smooshes them into rock layers
- C) Metamorphic rock:
Formed by heat and pressure
Rocks underground are squeezed and heated enough to change into metamorphic rocks