1. Conservation of Natural Resources: Energy, Soil, Land and Recycling 8SCIENCE: Wed. Jan. 19 and Thurs. Jan. 20

2. Review: What is Conservation? Protecting the land and resources so future generations can use them We can manage resources wisely 3Rs

3. Conservation of Energy Which natural resources should we try and conserve and protect? ALL natural resources: non/renewable, wildlife How can we conserve these energy resources?

4. Conservation of Soil What effect do humans have on soil? Soil is used for agriculture: Growing and planting of crops: e.g. corn, banana Native plants are replaced by these crops What do crops need to grow? Nutrients These nutrients are taken out of the soil when crops are harvested = soil depletion If nutrients are not replaced, soil may not be able to grow more crops

5. How can we conserve the soil? Crop rotation Changing the type of crops so more nutrients may stay in the soil Fertilizer Compost Chemicals

6. Conservation of Soil Erosion: When soil is removed by wind or water Related to the TYPE of farming and management of the soil Plows prepare land for crops, but special methods can reduce erosion Terracing – very common in Colombia Strip-cropping

7. Recycling Part of the 3Rs Reduce, reuse and recycle Recycling is: a process that changes an item or resource to be used again Advantages? Saves more of the resource being used Saves land space that could become a landfill (where garbage goes)