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You have 10 minutes to 1. copy the card onto a new index card- including your group names.

Your group letter is on your desk! 2-3 per group Take an index card with writing and a blank index card. You have 10 minutes to 1. copy the card onto a new index card- including your group names. 2. Answer/define/give the main idea for your topic as briefly as possible

aubrey-chapman
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You have 10 minutes to 1. copy the card onto a new index card- including your group names.

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  1. Your group letter is on your desk!2-3 per group Take an index card with writing and a blank index card • You have 10 minutes to • 1. copy the card onto a new index card- including your group names. • 2. Answer/define/give the main idea for your topic as briefly as possible • 20 minutes- to include your main ideas on the PowerPoint slide • Either type or write • I will help with this part

  2. Air Resources • Pollutants : harmful material that can enter the biosphere through the land, air or water • Smog : a mixture of chemicals that occurs as a haze in the atmosphere, gray-brown • Acid Rain : rain containing nitric and sulfuric acids, toxic and can harm living things

  3. Overpopulation • More resources consumed and economy is affected as well Many countries have to head towards Demographic Transition to help lower population.

  4. Biological Magnification • Biological Magnification is when harmful substances increase in organism at higher trophic levels in a food chain or food web. • Osprey, brown pelican and bald eagle in extinction.

  5. Ozone Layer Depletion • Ozone layer blocks out the UV rays • Ozone layer is being depleted by aerosol • Sunblock protects people from UV rays • 46 countries signed an agreement to reduce aerosol usage by 2000

  6. Global Warming • Global warming is the term used to describe an increase in the average temperature of the biosphere • It is happening due to humans producing extra CO2 • Polar ice caps melt, floods occur, ecosystems are disturbed, and there are rises of tropical disease.

  7. Water Resources • Humans use billions of gallons of fresh water used daily • Pollution- sewage, oil spills, discarded chemicals. • Irrigation delivers water

  8. Renewable and nonrenewable resources • A renewable resource is one that can regenerate itself naturally, but is not necessarily unlimited (for example droughts limit water); this includes forests, freshwater and grassland • A nonrenewable resource cannot be replenished by a natural process; for example oil, coal and natural gas (technically they can regenerate, but it takes millions of years and is not practical)

  9. Land Resources • Provides space for cities and suburbs and raw materials for industry. • Contains soil can be permanately damaged if mismanaged • Erosion- wearing away of surfaces soil by water and wind • Desertification- in areas with dry climates, a process caused by a combination of poor farming practices, overgrazing, and drought that turns productive land into desert

  10. Ocean Resources • People depend on the ocean as a major source of protein. • Throughout the second half of the twentieth century, larger fishing boats with better gear for locating and catching fish were deployed around the world. • The annual world fish catch grew from about 20 million tons to more than 90 million tons between 1950 and 1990.

  11. Forest Resources Deforestationsustainable use • Loss of forests • Can lead to severe erosions as soil is exposed to heavy rain • Mature trees can be harvested selectively to promote the growth of younger trees • Planting new trees is one way to counteract • Erosion can also wash away nutrients in the top soil.

  12. Pollution • Pollution is the process by which harmful materials enter the biosphere through land, air, water and affect the environment as well as its inhabitants. • In the process of biological magnification the concentration of a pollutant is multiplied as it passes from producers to consumers, down the food chain. • This magnification makes pollution an even more deadly issue.

  13. Introduced Species • * They become invasive species that reproduce rapidly • Over consumption of food resources • Other species become extinct due to competition • Loss of biodiversity • One disease could wipe out entire population • Ex: Zebra mussels: Europe to Great Lakes

  14. Threats to Biodiversity • Biodiversity is variety in organisms in the biosphere. • Humans develop new land and destroy habitats, causing species to vanish. This is known as habitat fragmentation. • Some species are hunted for fur, meat, and hides. Some are hunted for medical purposes such as animal horns and gall bladders.

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