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Sixth Grade Science SOIL Lesson 8.

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Presentation on theme: "Sixth Grade Science SOIL Lesson 8."— Presentation transcript:

1 Sixth Grade Science SOIL Lesson 8

2 Earth’s Soil Soil is the basis of life for all living things on Earth’s surface

3 Particles of weathered and eroded rock
Of What Is Soil Made? Particles of weathered and eroded rock Humus –once living plants & animals Air Water Living organisms

4 Physical Rock Weathering
Mechanical weathering – rock changes shape , size, but is still the same material Ice Wedging Pressure Release Plant root growth Abrasion

5 Mechanical Weathering: Ice Wedging

6 Mechanical Weathering: Pressure Release/Exfoliation

7 Mechanical Weathering: Plant Root Growth

8 Mechanical Weathering: Abrasion

9 Chemical Weathering Dissolving Rusting

10 Chemical Weathering: Dissolving

11 Chemical Weathering: Rusting

12 Rock Particles In Soil Are Of Different Sizes
Gravel Sand Silt Clay

13 Soil Layers Soil Layers are called HORIZONS

14


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