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Today: We will explain the changes on Earth’s surface and be able to determine how rocks provide valuable information about Earth’s crust. You will work.

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Presentation on theme: "Today: We will explain the changes on Earth’s surface and be able to determine how rocks provide valuable information about Earth’s crust. You will work."— Presentation transcript:

1 Today: We will explain the changes on Earth’s surface and be able to determine how rocks provide valuable information about Earth’s crust. You will work with a partner to describe, explain and identify various examples of how Earth’s surface changes through natural and chemical processes.

2 The Basics… WEATHERING: The breakdown of rocks
MECHANICAL weathering = the natural and physical breakdown of rock CHEMICAL weathering = the breakdown of rock by chemical reactions Acid precipitation

3 MECHANICAL WEATHERING
Erosion: Movement of sediment by wind, water, glaciers and gravity WATER! Major agent of erosion Rivers Oceans Freeze/Thaw: water freezes and expands, thaws and rocks break apart Plants: roots may grow into tiny cracks in rocks and exert force, breaking the rock

4 Test It… You will see a series of pictures.
One partner will look at the picture and describe it to his/her partner. The partner will write down what Earth process they believe is represented by the picture. *We are NOT giving answers here! IE: erosion by water; chemical weathering; etc… Then, partners switch positions. Repeat!

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11 PARTNERS SWITCH!

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18 Were You Right?!

19 EROSION BY WATER

20 CHEMICAL WEATHERING

21 EROSION BY WATER

22 MECHANICAL BY FREEZE-THAW

23 MECHANICAL BY PLANTS

24 EROSION BY WIND

25 EROSION BY WIND

26 EROSION BY WATER

27 EROSION BY WATER

28 MEHCANICAL BY PLANTS

29 CHEMICAL WEATHERING

30 MEHCANICAL BY FREEZE-THAW

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