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FOSS Earth History Inv 8 - One Rock to Another (8 days)
Big Idea
Igneous and Metamorphic Rocks and the processes that form these rocks.
Essential Questions
What properties can be used to identify and categorize different rocks?
How does the rate of cooling affect the crystals in a rock?

Formulate a conclusion based on data analysis.
Describe a scientific discovery that influences technology.
Distinguish the components and characteristics of the rock cycle for the following types of rocks
  • igneous
  • metamorphic
  • sedimentary
Display data collected from a controlled investigation.
Classify rocks and minerals by the following observable properties
  • grain
  • color
  • texture
  • hardness
Observe and compare the properties of sedimentary, igneous, and metamorphic rocks. Use Salol to simulate the processes of crystal formation in igneous rocks.
Students will use multiple materials to identify different rock samples.
Students will conduct an investigation to test how cooling rates affect the size of crystals.
Science & Engineering Practices
Planning and Carrying Out Investigations:  students make observations in order to identify rock samples
Planning and Carrying Out Investigations:  Salol Lab for understanding of crystallization
Content/Core Ideas
  • Igneous rocks form when molten rock solidifies.  Extrusive igneous rocks form when lava solidifies on Earth's surface.  Intrusive rocks form when magma solidifies within existing rock below Earth's surface.
  • Metamorphic rocks form when heat and pressure change existing rocks into new rocks.
  • Igneous, metamorphic, and sedimentary rocks can be changed from one type to another over time in a process called the rock cycle.
Crosscutting Concepts
Learning Practices
CC:7.RI.1  students read The Story fo the Wrightwood Marble
Academic Vocabulary
  • crust
  • mantle
  • core
  • magma
  • intrusive
  • extrusive
  • source rock
  • (morph) rock
  • rock cycle
Mid-summative Exam 8
Final Summative Exam
Crystal-Size Investigation
Igneous Rock Questions
informal assessment of rock analysis