2-1 F. Objectives: Define rocks Describe the rock cycle and some changes that a rock could undergo.

Size: px

Start display at page:

Download "2-1 F. Objectives: Define rocks Describe the rock cycle and some changes that a rock could undergo."

Anabel Jane Marshall
6 years ago
Views:

1 2-1 F Objectives: Define rocks Describe the rock cycle and some changes that a rock could undergo.

2 Rocks are a mixture of minerals, glass, organic matter, and other natural materials.

3 + + feldspar hornblende + mica = quartz

4 Granite

5 Rocks are changed by processes such as: a. weathering b. erosion c. compaction d. cementation e. melting & cooling f. heat & pressure

7 Three types of rock 1. Igneous rock

8 2. Metamorphic rock

9 3. Sedimentary rock

10 Many times transformations are interrupted. This is an example of an igneous rock interrupted before completely transforming into a metamorphic rock.

11 Here is a map showing the United States and part of Canada and Mexico. This map shows what type of rock makes up the surface of these regions

12 Three little rocks went to the doc. The first said, Doctor, please! On the ocean floor, washed down from the shore, I was squished and squashed and squeezed. Hmmm said the doc. That s not a great shock. You were just becoming a sedimentary rock.

13 The second said, Doc, I was boiling hot, Deep down inside the planet, But then I was pushed, cooled off, and smushed, And now I feel like granite. Hmmm said the doc. Don t be a worrywart, You ve turned into stone of the igneous sort.

What I am now, I haven t a clue. Hmmm said the doc.

14 The third said, Doc, I started as a rock, Just like these other two, I was under great stress, I m a flattened mess, What I am now, I haven t a clue. Hmmm said the doc. Your condition s well known. It s obvious now you re a metamorphic stone.

15 Thank you, Doc! said each little rock, Wearing a happy smile, Then one by one, they rolled out in the sun And sat there in a pile.

16 2-2F Objectives:. Recognize magma and lava as the materials that cool to form igneous rocks. Contrast the formation of intrusive and extrusive igneous rock. Contrast granitic and basaltic igneous rocks.

17 Comes from molten material. It can be intrusive or extrusive.

18 Molten rock under Earth s surface is less dense & is forced upward. If it cools under the surface it forms intrusive igneous rock. The slower the cooling process, the larger the crystal grains.

19 Lacc olith Batholith

20 Forms when lava hardens on or near Earth s surface. It cools quickly and produces fine grained crystals. (ex. Pumice, Obsidian)

21 obsidian pumice

22 Classification of Igneous Rock Basaltic rocks Dark gray to black D e n Fine grained s e

23 Granitic Granitic igneous rocks are light colored and less dense than basaltic rocks.

24 Andesitic Andesitic rocks have compositions between granitic and basaltic.

25 Igneous rock is the most abundant rock on Earth.

26 2-3F Objectives: Describe conditions that cause metamorphic rocks to form. Classify metamorphic rocks as foliated or nonfoliated.

27 Rocks that have changed due temperature and pressure. They can be formed from igneous, sedimentary, or other metamorphic rocks.

28 Examples Granite changes to gneiss Limestone changes to marble Shale changes to slate

29 Classification (according to texture) Foliated texture line up in parallel bands slate gneiss

30 Non-foliated rocks no bands occur quartzite marble

31 Objectives: Explain how sedimentary rocks form from sediments. Classify sedimentary rocks as detritil, chemical, or organic. Summarize the rock cycle.

32 75% of the rocks on Earth s surface are sedimentary rock. Sedimentary rocks are formed when sediments are pressed and cemented together, or when minerals form from solutions.

34 Detrital Sedimentary Rocks are made by broken fragments of eroded rocks. Detrital rocks are formed by the process of compaction and cementation

35 Compaction layer upon layer of sediments build up Pressure from upper layer pushes down Sediment sticks together Solid rock

36 Cementation Large pebbles & sand Water soaks through Dissolves minerals in rock Forms a natural cement

37 Chemical Sedimentary Rock Chemical sedimentary rock are from dissolved minerals in a solution. Rock Salt Limestone

38 Organic Sedimentary Rock Rocks made up of once living things are called organic sedimentary rock. Animal shells make up natural chalk. Coal is made of decayed swamp plants.

Rocks. Section 1:Igneous Rocks. Section 2:Sedimentary Rocks. Section 3: Metamorphic Rocks. Section 4: The Rock Cycle

Rocks. Section 1:Igneous Rocks. Section 2:Sedimentary Rocks. Section 3: Metamorphic Rocks. Section 4: The Rock Cycle Rocks Section 1:Igneous Rocks Section 2:Sedimentary Rocks Section 3: Metamorphic Rocks Section 4: The Rock Cycle BILL NYE ROCKS https://www.youtube.com/watch?v=jvd- SPZLh5s What is a rock? Common Rocks