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The Wonderful Earth

The Wonderful Earth. Mysteries of Earth~ Rocks that Talk. Earth Changes, it can tell us how by what we observe…. Physical weathering Chemical weathering Erosion Melting Moving Crystallizing Type of Rock or Mineral. Minerals click here. Minerals.

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The Wonderful Earth

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  1. The Wonderful Earth Mysteries of Earth~ Rocks that Talk

  2. Earth Changes, it can tell us how by what we observe… • Physical weathering • Chemical weathering • Erosion • Melting • Moving • Crystallizing • Type of Rock or Mineral

  3. Minerals click here

  4. Minerals Inorganic solid substance that occurs naturally has a definite chemical recipe and crystalline structure • ID a mineral by… • Density • Hardness • Color • Luster • Streak • Crystal shape • Special Tests

  5. How do minerals form? • Review minerals for homework tonight! (10 minutes)

  6. Rocks • Hard • Solid • Mass composed of one or more minerals, or other elements and compounds. • To discover their origin geologist study the rocks color , texture, and mineral composition. • H:\Curricula\Rock Science\Interactive Rock Cycle Animation.mht

  7. Examine the rocks on your desk with the hand lens provided. • Use descriptive words to record your observations on your paper. Indicate that your observations are for rock A, B or C.

  8. Notes for lab… • TEXTURE the look and feel of the rock’s surface. A rock’s grains give the rock it’s texture. You must observe: GRAIN SIZE GRAIN SHAPE GRAIN PATTERN GRAIN NOT VISIBLE

  9. Rock Groups • Sedimentary • Metamorphic • Igneous

  10. Igneous • Forms from cooling of molten lava in two major ways • Intrusiveforms beneath the Earth’s surface • Extrusive forms above the Earth’s surface • Dark rock are said to be Mafic (Magnesium and Iron ) • Light are Felsic (feldspar and silica) • Slow cooling lava = large grains • Fast cooling lava = small grains

  11. Sedimentary • Small pieces of rock, known as sediment, come together to form rock • Sediment such as: inorganic rock or organic matter • Erosion occurs: Water, wind, and ice carry sediment • Deposition occurs: sediment settles out of water. Layers form and are squeezed together tightly.

  12. Types of Sedimentary • Clastic~ sediment that is squeezed together • Organic~ remains from plants or animals that are deposited in thick layers • Chemical~ minerals dissolve in water and mix with other minerals, a new chemical forms, water evaporates

  13. Metamorphic • Heat and pressure change rocks beneath the Earth’s surface. There are two categories: • Foliated : grains are arranged in parallel layers • Non-foliated : grains are arranged randomly, not in layers GO TO ACTIVITY

  14. STOP

  15. Inside Earth

  16. Volcanoes~ activity will follow

  17. Go to Discovery education watch the video clips you have been assigned on PT, Volcanoes, and inside earth.

  18. Plate tectonics There are 3 types of plate movements, you will be able to draw and explain each one plus the geological formations that occur with each. • Transform • Divergent • Convergent

  19. Plate Tectonics video clip click

  20. Weathering and Erosion The three processes which cause the earth to wear down are physical weathering, chemical weathering, and erosion. 1. Physical weathering is the actual breakdown of rock by the action of natural forces such as water, wind, plants, and animals. Examples would be water turning to ice in the cracks of rocks which causes them to breakdown, the growth of plant roots through rocks, the wearing down of rocks due to animal foraging, and the breakdown of rock due to wind.

  21. Chemical Weathering 2. Chemical weathering causes changes in the rocks from the reactions of different chemicals on the surface of rocks. Examples are oxidation, rust, that deteriorates any surface on which it acts acidic secretions of lichen plants growing in rock, and the effects of carbonic acid, which can cause caves and caverns to form over time

  22. Erosion • 3 Erosion is the washing, blowing, or carrying away of weathered rock material. Forces of erosion are wind, water, ice, and gravity. Running water is a good example of erosion, as are glaciers and mass wasting. • Weathering is breaking rock..Erosion is moving the rock!

  23. References • Basics of Geology: All About Rocks and Minerals • Discovery Education retrieved by Laurie Haddock 2010 for educational purposes only

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