Presentation on theme: "Human Activity Do Now: A forest can be considered a natural resource."— Presentation transcript:
1 Human Activity Do Now: A forest can be considered a natural resource. Why do you think this is so?EQ - What are the effects of human activity on erosionand natural resources?
2 EQ - What are the effects of human activity on erosion and natural resources?GPS Which Standards are students learning in this unit?S6E5. Students will investigate the scientific view of how the earth’ssurface is formed.i. Explain the effects of human activity on the erosion of the earth’ssurface.j. Describe methods for conserving natural resources such as water,soil, and air.S6E6. Students will describe various sources of energy and with theiruses and conservation.a. Explain the role of the sun as the major source of energy and itsrelationship to wind and water energy.
3 What is erosion?The natural movement of sediment from one place to another.
4 What human activities cause erosion? Humans cause erosion by logging, mining, farming, and construction.
5 What is logging? How logging contributes to erosion: Tree roots die Clear-cutting – cutting down all trees in an area.How logging contributes to erosion:Tree roots dieDecay takes placeNothing is left to anchor soilRain washes soil away
6 What is mining? Strip Mining – removes surface Open Pit – cuts large pitsBoth of these remove plant roots that anchor soil.
7 What is farming? How farming contributes to erosion: Pulls nutrients out of the soil, leavingthe soil vulnerable to erosion.Dust Bowl –Removed grasses to plant wheatDrought – little or no rainWheat diedWind blew soil awayOnly dust left
8 What is construction? Clear land to build This removes plants and roots that anchor soil.
9 Key Questions What is soil conservation? What methods prevent soil erosion?What is a cover crop?What is crop rotation?What is contour plowing?What is terracing?What is windbreak?
10 Soil Conservation-various methods humans use to take care of the soil. What is soil conservation?Soil Conservation-various methods humans use to take care of the soil.
11 What methods prevent soil erosion? Methods to prevent soil erosion-cover crop, crop rotation, contour plowing, terracing, and windbreak.
12 What is a cover crop?Cover Crop-a crop that is planted in between harvests to reduce erosion and replace nutrients. Ex:soybean and clover
13 What is crop rotation?Crop Rotation-change crops from year to year so that nutrients do not get depleted
14 What is contour plowing? Contour plowing-rows in a field are plowed in curves instead of straight lines.
15 What is terracing?Terracing-one steep field is changed into a series of smaller fields.
16 What is windbreak? Windbreak-planting trees around a field to prevent wind erosion.