4.1 Rock cycle & 4.2 Igneous rocksHow do rocks form? Blog: Differentiate between igneous, sedimentary and metamorphic rocks. Feedback distributer: Dey Announcement: Policy
Expectations • Class blog • Respect your community, space and yourself • Safety policy – food, gum chewing • Late policy – late work form • Redo policy – quiz or test • Language policy • Seeing me for help
Rocks • Natural, solid mixture of minerals or grains • Classification of rocks • Texture: size of grains, arrangement of the grains, feel of the rock • Composition: presence of certain minerals
Today • Launch lab. Think about this Questions 1 -2. • Lesson 2 Review Q 1 – 10.
4.1 Rock cycle & 4.2 Igneous rocksHow do rocks form? Blog: How did last class’s activity model the formation of igneous rocks? Have your homework out ready (Notes on Chapters 4.1 and 4.2) Feedback distributer: Dey
To do today • Please help me to clean up the beakers! • How do you identify igneous rocks? P. 124 • Questions 8 – 10 3. Find the answer to your personal question. 4. Read 4.3 Sedimentary Rocks. Take notes.
4.3 Sedimentary rocksHow do rocks form? Blog: How do sedimentary rocks form? Have your homework out ready (Notes on Chapter 4.3) Feedback distributer: Dey
Sedimentary rock formation • Weathering=set of physical and chemical processes that break rock into smaller pieces • Physical: collision with other rocks, growth of ice crystals, and growth of plants • Chemical: reaction with water to create more stable minerals • Erosion and transport = movement of materials via wind, water, gravity, glacier • Deposition= settling of sediments
Sedimentary rock formation • Compaction= weight from the layers of sediment forces out fluids and decreases space between grains • Cementation= when minerals dissolved in water crystallizes between sediment grains
Today • How are sedimentary rocks classified? Lab • Make a chart with physical and chemical characteristics of the rocks and possible uses • Homework: read chapter 4.4 on Metamorphic rocks and take notes.
4.4 Metamorphic rocksHow do rocks form? Feedback distributer: Alessandro Submit sedimentary rock lab if you did not last time Upcoming quiz on Chapter 4
Vocabulary game • Find a partner who has the matching definition/word as your card. • When you find your partner, write your definition/word on the board.
Metamorphism lab • p. 138 Identifying the type of rocks Questions 11 – 13
Metamorphism • Metamorphism= process that affects the structure or composition of a rock in a solid state as a result of changes in temperature, pressure or the addition of chemical fluids • Plastic deformation = permanent change in shape by bending and folding
Metamorphic rock identification • Foliated rocks = contain parallel layers of flat and elongated minerals (layers) • Non foliated rocks = have mineral grains with random, interlocking texture
Metamorphic rock identification • Contact metamorphism = magma comes in contact with existing rock, and its thermal energy and gases interact with the surrounding rock, forming new metamorphic rock • Regional metamorphism = formation of metamorphic rock bodies that are hundreds of square kilometers in size