2. I can summarize the rock cycle.
Today’s goal:
I can summarize the rock cycle.

3. Rocks
What is a rock?
Relatively hard, naturally formed substance that is made of minerals.

4. Rocks
3 Types of Rocks:
Igneous
Sedimentary
Metamorphic

5. Igneous
Igneous means “made from fire or heat.” Igneous rocks are made from magma or lava.

6. Igneous
When magma cools under the Earth’s surface it becomes rock! We call rocks that cool INSIDE the Earth INTRUSIVE IGNEOUS ROCK.

7. Igneous
We call rocks that cool OUTSIDE the Earth EXTRUSIVE IGNEOUS ROCK.

8. Igneous Intrusive vs. Extrusive Igneous Rock Intrusive Rocks
Extrusive Rocks
Cool Slowly
Cool Quickly
Forms Big Mineral Crystals
Forms VERY tiny Mineral Crystals

9. Igneous BIG PINK AND BLACK CRYSTALS NO CRYSTALS, FULL OF HOLES!
Intrusive Rock
Extrusive Rock
BIG PINK AND BLACK CRYSTALS
NO CRYSTALS, FULL OF HOLES!

10. Igneous Intrusive Rock Extrusive Rock Large Black Crystals
TINY White Crystals

11. Intrusive or Extrusive?
Igneous
Intrusive or Extrusive?
PUMICE

12. Intrusive or Extrusive?
Igneous
Intrusive or Extrusive?
OBSIDIAN

13. Intrusive or Extrusive?
Igneous
Intrusive or Extrusive?
RHYOLITE

14. Intrusive or Extrusive?
Igneous
Intrusive or Extrusive?
ANDESITE

15. Intrusive or Extrusive?
Igneous
Intrusive or Extrusive?
PUMICE

16. Intrusive or Extrusive?
Igneous
Intrusive or Extrusive?
PEGMATITE

17. Igneous
What else did you notice about intrusive and extrusive rocks?

18. IGNEOUS How to recognize igneous rocks: May be black or dark
May have holes or pores
May have glassy surface

19. SEDIMENTARY
What happens to a rock that has been rained on for HUNDREDS of years? What about a rock that has had STRONG winds blowing on it for hundreds of years? What about TWO rocks that have been grinding against each other for hundreds of years?

20. Sedimentary
We call the process of rocks wearing down WEATHERING or EROSION.

21. What happened to these rocks?
sedimentary
What happened to these rocks?

22. What do you think happened to these rocks?
sedimentary
What do you think happened to these rocks?

23. What do you think happened to this rock?
sedimentary
What do you think happened to this rock?

24. What do you think happened to this rock?
sedimentary
What do you think happened to this rock?

25. What do you think happened to this rock?
sedimentary
What do you think happened to this rock?

26. What do you think happened to this rock?
sedimentary
What do you think happened to this rock?

27. Sedimentary
Sometimes rocks are weathered into TEENY-TINY pieces.

28. Sedimentary
Sedimentary rocks are made from smaller pieces of rocks. Sedimentary rocks form in flat, horizontal layers.

29. Words to know for Sedimentary Rocks
Sediment: small pieces of rock, gravel, or sand Weathering: the act of BREAKING down rocks by wind or water Erosion: the act of MOVING sediment

30. Deposition: when sediment gets placed somewhere Compaction: when sediment gets pushed together Cementation: when minerals and water glue sediments together

31. SEDIMENTARY

32. Sedimentary

33. Sedimentary
Small Sediments

34. Sedimentary
Large Sediments

35. Sedimentary
COAL

36. Sedimentary
ROCK SALT

37. Sedimentary
BRECCIA

38. SEDIMENTARY How to recognize a sedimentary rock: Feels grainy
Looks like it is made of smaller rocks
Layers in flat straight lines

39. Metamorphic
Sometimes rock gets buried below the surface of the Earth. Rock that is buried can become HOT and is pressed by the ground above. This MORPHS the rock!

40. METAMORPHIC
Metamorphic rocks form inside the Earth through lots of heat and pressure

41. How do you know this metamorphic and NOT sedimentary?

42. Metamorphic
GNEISS
This rock looks like granite, but is layered like sandstone…what makes it metamorphic?

43. Metamorphic
SCHIST

44. Metamorphic

45. Metamorphic
SLATE

46. Metamorphic
MARBLE

47. metamorphic How to recognize a metamorphic rock:
Will feel heavy and dense
May have bands (called foliation)
Look “melty” (like melted crayons)