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Do Now What is a rock? Why do you think rocks look different?

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Presentation on theme: "Do Now What is a rock? Why do you think rocks look different?"— Presentation transcript:

1 Do Now What is a rock? Why do you think rocks look different?


3 Objective I will be able to describe how igneous, sedimentary and metamorphic rocks are formed.

4 Rock Cycle Video

5 Types of Rock

6 Sedimentary Rock Formation
Sedimentary rocks are formed from loose pieces of sediment and sand which are pressed and cemented together; The layers get squashed together.

7 Sedimentary Rock Vocabulary

8 Sediments- broken rock materials; may also contain plant and animal matter.

9 Weathering- the breakdown of rock by wind and water
Weathering- the breakdown of rock by wind and water. Erosion-is the transporting of the broken rock material, or sediments, to a new location, where it is deposited.

10 Compaction- process where the upper layers put pressure on the lower layers causing small sediments to stick together

11 Cementation- a solution of minerals and water seeps between large sediments and "glues" them together.

12 Sedimentary Rock Characteristics
Flat or curved layers Particle size may be the same or vary Usually has pores between pieces

13 Sandstone, Limestone, Shale, Conglomerate

14 Metamorphic Rock Formation
Metamorphic rock is formed from preexisting rocks when heat, pressure and stress cause cause the rock to melt and turn into magma.

15 Metamorphic Rock Vocabulary
Metamorphosis- "change" or "transformation". Magma is melted rock trapped beneath the Earth's surface. Lava is magma that has reached the Earth's surface.

16 Metamorphic Rock Characteristics
Can be formed from igneous rocks, sedimentary rocks, or other metamorphic rocks. May have alternate bands of light and dark minerals Rarely has pores or openings

17 Gneiss, Marble, Quartzite, Slate

18 Igneous Rock Formation
Igneous rocks form when magma or lava cools and hardens.

19 Igneous Rock Vocabulary
Extrusive- Igneous rock that forms above the Earth's surface. Intrusive- Igneous rock that forms below the Earth's surface.

20 Igneous Rock Characteristics
Normally contains no fossils Usually made of two or more minerals May be light or dark colored May be fine-grained or glassy (extrusive)

21 Granite, Basalt, Obsidian

22 Rock Cycle Journey Worksheet Comic Strip

23 Objective I will be able to describe how igneous, sedimentary and metamorphic rocks are formed.

24 Rock Cycle

25 Do Now Take out your Homework and place it on the front edge of the table. What is the rock cycle?


27 Objective I will be able to describe the rock cycle.

28 Igneous Rock Crystallization
When it cools slowly it forms coarse-grained rocks. When it cools fast if forms fine-grained rocks.

29 Rock Cycle Graphic Organizer

30 Turn it over and write the following on the back
The Rock Cycle is a process that builds, destroys and changes the rocks in the crust.

31 Where do the rock cycle facts go?
Wind + water (weathering) = breakdown rocks

32 Broken Rocks + plant & animal matter = sediment

33 Pre-existing rock + heat and pressure = melted rocks

34 Small sediments + pressure of upper layers = compaction

35 Lava Cools and Hardens = Extrusive Rock

36 Broken rocks + deposited at new location= erosion

37 Large sediments are glued together = cementation.

38 Quick Cooling Magma = Fine-grained rocks

39 Slow Cooling Magma = Coarse-grained rocks

40 Magma Cools and Hardens = Intrusive Rock

41 Exit Ticket How are sedimentary rocks formed?
How are metamorphic rocks formed? How are igneous rocks formed?

42 Do Now What are minerals?
Where do you think you could find minerals in nature?


44 Rocks and Minerals

45 Rocks and Minerals Graphic Organizer

46 Minerals Video

47 Characteristics of Minerals
Must be a solid Must occur in nature Chemical composition Crystalline structure Must be inorganic

48 Characteristics of Rocks
Mixtures of different types of minerals May contain organic materials Many rocks are not solid (magma) Naturally occurring

49 Rock/Mineral Data Table
Sample Color Texture (Fine or Coarse) Shiny or Dull Smooth or Rough Looks like glass or metal Size (in. or cm.) Rock Group (igneous, metamorphic, sedimentary) Mineral?

50 Analyze and Conclude Use your samples and table to answer the following questions. Which of the samples could be a mineral? What physical properties do they share with the other samples? How are they different? What properties were most useful in classifying the samples? Why?

51 Exit Ticket How are rocks and minerals different?

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