Bell work Thursday October 5 2012 Name three

Bell work Thursday October 5, 2012 Name three natural resources. What is the difference between renewable and non -renewable? Put the answers on the back of the bell work sheet

Natural Resources Fossil Fuels – Oil, Coal and Natural gas Food staples – Wheat, rice and corn Land for agriculture Land for housing, transport industry and human leisure activity • Land water for waste disposal • •

Raw Materials Renewable Nonrenewable Replaced as fast as plants and animals can grow Examples: Energy sources and minerals when used are gone forever and can not be replaced Timber Fish Crops Solar, hydroelectric, wind Oil Natural gas Coal

Natural Resource Usage Oceans – Overfished Toxic wastes poured into oceans Rivers used as disposal for waste Forests clear cut for timber, paper, land for farming, roads, firewood and charcoal Results on the earth

Problems from deforestation • Soil in deforested rainforests – thinning and lost because erosion (washes away) easily • Local weather changes - more storms • Increased runoff and more flooding • Loss of habitats and species extinction • More Carbon dioxide into air because less plants

Pollution • Harm done to environment by release of substances produced by human activities • Factories – chemical wastes • Agriculture- livestock waste, chemicals • Domestic waste – Trash, packaging • Nuclear fallout

Agriculture Overuse of fertilizers, herbicides & pesticides Eutrification Fertilizers wash into lakes and streams with run-off and adding nutrients causing excess growth of oxygen depleting plant life and a competition for oxygen so less fish

It is estimated that between 1880 and 1980 40% of all tropical rainforests were destroyed SO Deforestation and agricultural chemical use have caused the most pollution side effects in our ecosystems

Ticket out the Door • Give three reasons why the forests were destroyed • Give three effects that deforestation has on the environment • What two factors have caused the most pollution side effects on our ecosystems?

• • BW – Oct. 9, 2012 Draw a winding river Show the flow of the river Put a factory on your river Organism A, B, C and D – A is before the factory – B is right after the factory – C is down from b – D is farthest down the river Question: Which organism lives in the most polluted water?

Greenhouse effect • Naturally occurring greenhouse gases act as blanket around the earth and prevent some heat energy escaping into space. Mainly infra-red radiation

Greenhouse effects and results • Air pollution by CO 2 and Methane has increased the greenhouse effect and is contributing to global warming • Consequences – rise in sea level, flooding in low areas, changes in world climate and reduction in crop production

Natural vs Human Enhanced <meta HTTP-EQUIV="refresh" content="0; url=http: //www. google. com/imgres? num=10&hl= Website for this image Greenhouse effect graphic. Left - Naturally occurring greenhouse . . . nps. gov • Full-size image Type: • Same sizex larger), 40 KB 550 × 324 ( • Search by image Images may be subject to copyright. JPG

Fill in the blanks • Solar ______ passes through the _____ and the _____ earth’s surface. The earth ______ heat energy back into the _______. This is mainly_______ radiation. Some of the heat energy is ____ by the greenhouse gases. This causes the _____ to warm up. • Warms • Energy • Infra-red Absorbed Space Atmosphere Air Radiates

Conservation • Read conservation article • Describe the need for conservation of species and their habitats • Conservation of Natural resources – Water and non-renewable material including fossil fuels