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1.What is the difference between mechanical and chemical weathering? mechanical weathering - wearing down of rock without changing it completely chemical weathering - wearing down of rock by using chemicals or acids.
2. Describe the weathering processes of each chemical weathering agent. water can cause a reaction with some material air can cause rust by oxidation acid rain can dissolve granite and monuments acid in ground water can cause lime stone to be eaten away acid in living things can cause trees weather away
4. What is the most important and most common agent of chemical weathering? Why do you think? water can cause the most since everything can't weather rock without water
5. What is the difference between weathering, abrasion, erosion, and deposition? weathering-the wearing away of rock abrasion-the rubbing of two or more rock erosion-the carrying away of rock
6. What are the two most important factors in determining the rate of weathering? climate and surface area
7. How do hotter temperatures and wet climates affect the rate of weathering? they cause rust which breaks down iron
8. What are the horizons of a soil profile? What letter represents each horizon? What is found in each horizon? O horizon-dead plants and animals A horizon-humus B horizon-clay C horizon-partly broken rock R horizon-full rock
9. What layer of soil would you find the most humus? topsoil
10. Which horizon does soil formation begin? R horizon
11. List some examples of decomposers and explain why they are important for soil. worms, bacteria, and fugi
12. Which soil horizon layer forms last? O horizon
13. What is humus? organic material made of decomposed plants and animals
14. What is soil? a loose mixture of small organic matter
15. Which horizon is called the parent material? C horizon
16. What does it mean if soil is fertile? soil's ability to hold nutrients
17. Compare the particle sizes of sand, clay, and silt. sand is very small, clay is bigger, and silt is huge
18. Why is it good to have permeable soil or rocks? so roots can constantly get water
19. What are the 5 soil conservation techniques? Describe how each is used to conserve soil. Basic info. contour plowing protects from heavy rain terracing prevents erosion on steep hills no-till farming slows the losing of nut
19. What are the 5 soil conservation techniques? Describe how each is used to conserve soil. Basic info continued... cover crops covers soil so not to much rain crop rotation stops nutrients from disapearing no-till farming saves nutrients
Created by: Brian F
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