1 / 12

Unit 7 – Resources and the Environment ( Chp . 25, 26, & 27)

Unit 7 – Resources and the Environment ( Chp . 25, 26, & 27) . Review for TEST. Earth’s Resources Distributed Unevenly . Air Water Land Organisms Rocks Minerals Nutrients Geochemical cycles. Water. Liquid Wide range of temperatures High heat-storage capacity

kalil
Download Presentation

Unit 7 – Resources and the Environment ( Chp . 25, 26, & 27)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Unit 7 – Resources and the Environment (Chp. 25, 26, & 27) Review for TEST

  2. Earth’s ResourcesDistributed Unevenly • Air • Water • Land • Organisms • Rocks • Minerals • Nutrients • Geochemical cycles

  3. Water • Liquid • Wide range of temperatures • High heat-storage capacity • Dissolves many substances • Expands when it freezes

  4. Natural Resources Renewable: • living things • surface water • Groundwater • fertile soil • Air • solar energy • elements that cycle (carbon, nitrogen) • Replaced through natural processes at same rate as being used Non-Renewable: • Fossil fuels • Elements (gold, copper, silver) • Fixed amounts – replaceable through process that takes hundreds of millions of years

  5. Land Resources • Topsoil • Rocks • Minerals • Space for humans to use: • Housing • Agriculture • Roadways – use aggregates to build first layer. A mixture of gravel, sand, crushed stone

  6. How humans harm resources • Poor farming practices • Air pollution by activities that disrupt the balance of geochemical cycles • Burning of fossil fuels (releases sulfur) • Mining – ore can be mined for a profit

  7. Energy Resources • Sun is the primary energy resource • Biomass –wood and field crop burned to use as fuel • Coal • Natural gas • petroleum

  8. Air Resources • The most important component of air is: • Oxygen 21% • The oxygen in Earth’s atmosphere was supplied slowly over time by photosynthetic organisms • Geochemical cycles: • Water cycle • Carbon cycle • Hydrogen cycle

  9. Alternative Energy Resources • Solar energy • Hydroelectric power – energy from falling water • Geothermal energy • Nuclear energy • Biomass energy

  10. Word Equations Decreased demand for resources = reducing + reusing + recycling Biogas= methane + carbon dioxide Peat= remains of organisms + swamp + anaerobic conditions Gasohol = alcohol + gasoline Coal= peat + high temperature and pressure Topsoil= decaying organic matter + eroded rock + minerals + nutrients + oxygen + water

  11. Conservation / Population • Sustainable energy – will ensure current and future energy needs • Population will reach the carrying capacity and stop growing • Human Global Impact • Acid precipitation • Ozone depletion – ground level ozone is a major component of smog • Global warming

  12. GOOD LUCK! Test tomorrow

More Related