Land, Water, and Air Resources Conserving Land and Soil Waste Disposal and Recycling Water Pollution and Solutions Air Pollution and Solutions Global Changes

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<ul><li> Slide 1 </li> <li> Land, Water, and Air Resources Conserving Land and Soil Waste Disposal and Recycling Water Pollution and Solutions Air Pollution and Solutions Global Changes in the Atmosphere Table of Contents </li> <li> Slide 2 </li> <li> Land, Water, and Air Resources Main Idea Detail Identifying Main Ideas As you read the section Types of Land Use, write the main idea in a graphic organizer like the one below. Then write three supporting details that give examples of the main idea. Three uses that change the land are AgricultureMiningDevelopment Conserving Land and Soil </li> <li> Slide 3 </li> <li> Land, Water, and Air Resources Conserving Land and Soil Types of Land Use Pg. 633 1. Concept Map: Agriculture Mining Development 2. Why can less than a third of Earths land be farmed? The rest is too dry, wet, salty, or mountainous 3. List three ways that new farmland can be created. A.Clearing forests B.Draining wetlands C.Irrigating deserts 4. The construction of buildings, roads, bridges, dams, and other structures is called _____. development </li> <li> Slide 4 </li> <li> Land, Water, and Air Resources Conserving Land and Soil 5. Choices that is are a result of development. Decrease in farmland Decrease in wildlife habitats 6. the removal of nonrenewable resources from the land is called ____. mining 7. Venn Diagram: Strip Mining Underground Mining 8. Strip mining involves carrying minerals up through shafts dug in the ground. False </li> <li> Slide 5 </li> <li> Land, Water, and Air Resources Conserving Land and Soil The Structure of Soil Pg. 634 9. The way people depend on soil. To provide plants with nutrients To store and filter water to break down wastes to recycle chemical substances needed for life 10. Part of the structure of fertile soil. Litter Topsoil Subsoil Bedrock </li> <li> Slide 6 </li> <li> Land, Water, and Air Resources Conserving Land and Soil 11. Litter B- Dead leaves and grass. 12. Topsoil C- Rock fragments, nutrients, water, air, and decaying animal and plant matter. 13. Subsoil A- Rock fragments, water, and air 14. The rock that makes up Earths crust is called ____. bedrock </li> <li> Slide 7 </li> <li> Land, Water, and Air Resources Conserving Land and Soil 15. It takes about ten years to form a few centimeters of new soil. False 16. How is bedrock broken down to form soil? Freezing and thawing break apart the bedrock. Both plant roots wedged between rocks and chemicals released by lichens break the rocks into smaller pieces. Animals such as earthworms and moles help grind the rock into even smaller particles. </li> <li> Slide 8 </li> <li> Land, Water, and Air Resources Conserving Land and Soil Soil Management Poor soil management can result in erosion, nutrient depletion, and desertification. The advance of desert-like conditions into areas that previously were fertile is called desertification. </li> <li> Slide 9 </li> <li> Land, Water, and Air Resources Conserving Land and Soil Soil Management Pg. 635-637 17. List three problems that can result from poor soil management. A.Erosion B.Nutrient depletion C.Desertification 18. The process by which water, wind, or ice moves particles of rocks or soil is ____. erosion 19. List the soil conservation practice that is shown in the drawing. Terracing </li> <li> Slide 10 </li> <li> Land, Water, and Air Resources Conserving Land and Soil 20. The process of soil becoming less fertile is called ____. nutrient depletion 21. Leaving fields fallow C- Leaving fields unplanted 22. Applying fertilizer A- Adding nutrients that help crops grow better 23. Crop rotation B- Planting different crops in a field each year </li> <li> Slide 11 </li> <li> Land, Water, and Air Resources Conserving Land and Soil 24. What is desertification? It is the advanced of desert-like conditions into areas that previously were fertile. 25. In the past 50 years, a large amount of land is undergone desertification. true 26. Flowchart: Drought occurs Crops fail Soil blows away </li> <li> Slide 12 </li> <li> Land, Water, and Air Resources Conserving Land and Soil 27. The process of restoring land to a more natural, productive state is called _____. land reclamation 28. Land reclamation is currently underway all over the world. True 29. It is easier to restore damaged land and soil than it is to protect them. False </li> <li> Slide 13 </li> <li> Land, Water, and Air Resources Conserving Land and Soil 30. How can an open mine be restored to agricultural land? The mining cuts are smoothed out, then the subsoil and topsoil that had been removed before mining are replaced. Finally, grass and trees are planted. </li> <li> Slide 14 </li> <li> Land, Water, and Air Resources Soil Click the Video button to watch a movie about soil. Conserving Land and Soil </li> <li> Slide 15 </li> <li> Land, Water, and Air Resources Links on Erosion Click the SciLinks button for links on erosion. Conserving Land and Soil </li> <li> Slide 16 </li> <li> Land, Water, and Air Resources End of Section: Conserving Land and Soil </li> <li> Slide 17 </li> <li> Land, Water, and Air Resources Before you read, preview the red headings. In a graphic organizer like the one below, ask a why, what, or how question for each heading. As you read, write the answers to your questions. Question Answer Asking Questions What is the problem with waste disposal? Each disposal method has advantages and disadvantages. What is recycling? Reclaiming raw materials and reusing them to create new products How can people help control the solid waste problem? Reduce, reuse, and recycle. Why are some wastes hazardous? Some are explosive, flammable, corrosive, or radioactive. Waste Disposal and Recycling </li> <li> Slide 18 </li> <li> Land, Water, and Air Resources Waste Disposal and Recycling The Problem of Waste Disposal Billions of tons of municipal solid waste are created in the United States each year. More than one third of that waste is paper. </li> <li> Slide 19 </li> <li> Land, Water, and Air Resources The Problem of Waste Disposal A sanitary landfill holds municipal solid waste, construction debris, and some types of agricultural and industrial waste. Waste Disposal and Recycling </li> <li> Slide 20 </li> <li> Land, Water, and Air Resources Waste Disposal and Recycling The Problem of Waste Disposal Pg. 639-640 1.What is municipal solid waste? It is the waste produced in homes, businesses, schools, and other places in a community. 2. What are other sources of solid waste? Other sources include construction debris and certain agricultural and industrial wastes. 3. List three methods of handling solid waste. A.Burning B.Burying C.Recycling </li> <li> Slide 21 </li> <li> Land, Water, and Air Resources Waste Disposal and Recycling 4. Sentences that are true about incineration. It refers to the burning of solid waste. It can be used to generate electricity. 5. A place where solid waste is buried is called a(n) ____. landfill 6. A polluted liquid that forms when rain water dissolves chemicals in landfill waste is referred to as _____. leachate </li> <li> Slide 22 </li> <li> Land, Water, and Air Resources Waste Disposal and Recycling 7. How does a sanitary landfill differ from an open dump? Unlike an open dump, a sanitary landfill is constructed to safely hold solid waste. 8. Venn Diagram: Landfills Incinerators Recycling Pg. 641-642 9. What is recycling? It is the process of reclaiming raw materials and reusing them. 10. Recycling reduces the volume of solid waste. True </li> <li> Slide 23 </li> <li> Land, Water, and Air Resources Waste Disposal and Recycling 11. A substance that can be broken down and recycled by bacteria and other decomposers is said to be ____. biodegradable 12. List the four major categories of products that are recycled. A.Metal B.Plastic C.Glass D.Paper 13. What are some common metal objects that can be recycled? Objects include metal desks, scissors, staples, paper clips, soda cans, house siding, and window screens. </li> <li> Slide 24 </li> <li> Land, Water, and Air Resources Waste Disposal and Recycling 14. What products can be made from recycled plastic milk jugs and soda bottles? Products include fiber filling for sleeping bags, fleece jackets, carpeting, park benches, shower stalls, floor tiles, trash cans, and dock pilings. 15. Glass is one of the most difficult products to recycle. False 16. Why can paper be recycled only a few times? Each time paper is recycled, the new paper is rough. 17. Sentences that are true about recycling. It conserves resources. It saves energy. </li> <li> Slide 25 </li> <li> Land, Water, and Air Resources Waste Disposal and Recycling 18. Concept Map: Reduce Reuse Recycle 19. Helping natural decomposition processes break down waste is called ____. composting 20. How can compost be used? It can be used as a natural fertilizer for plants. </li> <li> Slide 26 </li> <li> Land, Water, and Air Resources Waste Disposal and Recycling Hazardous Wastes Pg. 644-645 21. Hazardous waste is any material that can harm human health or the environment. True 22. Toxic C- waste that poisonous 23. Explosive A- waste that reacts very quickly 24. Flammable D- waste that easily catches fire 25. Corrosive B- waste that dissolves many materials </li> <li> Slide 27 </li> <li> Land, Water, and Air Resources Waste Disposal and Recycling 26. Some radioactive waste can remain dangerous for thousands of years. True 27. A person can be exposed to hazardous wastes only by eating or drinking them. False 28. Long-term exposure to hazardous wastes can be life threatening. True </li> <li> Slide 28 </li> <li> Land, Water, and Air Resources Waste Disposal and Recycling 29. List the methods of hazardous waste disposal. A.Burial in landfills B.Incineration C.Breakdown by living organisms D.Storage in deep rock layers 30. Scientists have been able to develop completely safe and permanent methods for disposing of radioactive wastes. False </li> <li> Slide 29 </li> <li> Land, Water, and Air Resources Waste Disposal and Recycling 31. How are some radioactive wastes currently stored? They are stored in vaults dug hundreds of meters underground or in concrete and steel containers above ground. Liquid radioactive wastes may be stored in deep rock layers. 32. The best way to manage hazardous wastes is to produce less of them in the first place. True 33. What can you do at home to reduce hazardous wastes? You can find substitutes for some hazardous household chemicals such as insect sprays. </li> <li> Slide 30 </li> <li> Land, Water, and Air Resources Sanitary Landfill Activity Click the Active Art button to open a browser window and access Active Art about sanitary landfills. Waste Disposal and Recycling </li> <li> Slide 31 </li> <li> Land, Water, and Air Resources End of Section: Waste Disposal and Recycling </li> <li> Slide 32 </li> <li> Land, Water, and Air Resources Before you read, preview Figure 13. Then write two questions that you have about the diagram in a graphic organizer like the one below. As you read, answer your questions. Q. What are some household causes of water pollution? A. Water and human wastes that are washed down sinks, toilets, and showers Q. What is sediment? A. Rock and sand that has been eroded by water Water Pollution and Solutions Previewing Visuals </li> <li> Slide 33 </li> <li> Land, Water, and Air Resources Water Pollution Wastes produced by households, agriculture, industry, mining, and other human activities can end up in water. Water Pollution and Solutions </li> <li> Slide 34 </li> <li> Land, Water, and Air Resources Water Pollution and Solutions Water-A Limited Supply Pg. 648-649 1.Sentences that are true about Earths water supply. Water is a scarce resource Salt water cannot be used for drinking or watering crops. About three quarters of Earths fresh water is in the form of ice. 2. Water stored in layers of soil and rock beneath Earths surface is called _____. groundwater 3. How does the water cycle purify water? During the water cycle, water evaporates from oceans, lakes, and rivers. As it evaporates any dissolved substances are left behind. The pure water vapor condenses into droplets that fall as precipitation. </li> <li> Slide 35 </li> <li> Land, Water, and Air Resources Waste Disposal and Recycling 4. What is a drought? A period when less rain than normal falls in an area. Water Pollution Pg. 649-651 5. Substances that cause pollution are called ____. pollutants 6. How can pollution affect water in areas far from its source? Pollutants dissolve and move throughout a body of water. 7. Most water pollution is the result of human activities. True </li> <li> Slide 36 </li> <li> Land, Water, and Air Resources Waste Disposal and Recycling 8. List four human activities that produce wastes that can end up in water. A.Agriculture B.Industry C.Households D.Mining 9. The water and human wastes that are washed down sinks, toilets, and showers are called ____. sewage 10. List three kinds of agricultural wastes. A.Animal wastes B.Fertilizer C.Pesticides </li> <li> Slide 37 </li> <li> Land, Water, and Air Resources Waste Disposal and Recycling 11. Particles of rock and sand in running water are called _____. sediments 12. How do sediments affect organisms in water? They cover up food sources, nesting sites, and eggs of organisms. They also block sunlight, which prevents algae and plants from growing. 13. How can hot water cause pollution? Heated water can change the temperature of a body of water and kill organisms living there. </li> <li> Slide 38 </li> <li> Land, Water, and Air Resources Waste Disposal and Recycling Keeping Water Clean Pg. 652-653 14. Concept Map: Proper sewage Reduction of Pollutants Effective cleanup of oil and gasoline spills 15. Few communities treat wastewater before returning it to the environment. False 16. Primary Treatment B- Using filters to remove solid materials 17. Secondary Treatment A- Using bacteria to break down wastes </li> <li> Slide 39 </li> <li> Land, Water, and Air Resources Waste Disposal and Recycling 18. What are two ways industries can reduce pollution? They can recycle wastes to recover useful materials and they can change their processes to produce less waste or less harmful waste. 19. Oil is a pollutant that nature can handle in small amounts. True 20. How do bacteria break down oil in the ocean? When oil is present, the bacteria multiply quickly and feed on the oil. 21. Gasoline or oil that leaks from an underground tank is easy to clean up. False </li> <li> Slide 40 </li> <li> Land, Water, and Air Resources Waste Disposal and Recycling 22. How can polluted groundwater be cleaned up? Groundwater can be pumped to the surface, treated, and then returned underground. 23. How can individuals prevent water pollution? They can prevent pollution by not pouring household chemicals, such as paint thinners and motor oil, down the drain. </li> <li> Slide 41 </li> <li> Land, Water, and Air Resources More on Cleaning Up Oil Spills Click the Planet Diary button for an activity about cleaning up o...</li></ul>