Presentation on theme: "Earth’s Natural Resources"— Presentation transcript:
1 Earth’s Natural Resources Chapter 4Energy and Mineral ResourcesAlternative Energy ResourcesWind, Air, and Land ResourcesProtecting Resources
2 Energy and Mineral Resources Renewable and Nonrenewable resources.Renewable resource: replenished over a fairly short period of time.Ex’s)Nonrenewable resources: takes millions of years to form and accumulate.
3 Place a star on the renewables and an X on the nonrenewables
4 Renewable and Nonrenewable resources Fossil Fuels: A hydrocarbon that may be used as a source of energy.CoalOil / PetroleumNatural Gas
5 Coal Passes through 4 stages of development. Read page 95 in the text List the 4 stages of the development of coal below.
6 CoalMore than 70% of the coal mined today is used by powerplants to generate electricity.Where is most of the coal located in Pa?What type of coal is located there?Burning coal creates acid rain
7 Petroleum and Natural Gas How does Petroleum and Natural Gas form? (p.96)What prevents oil and natural gas from migrating to the surface?Draw and label a type of structure that traps oil.
8 Tar Sands Where is most of the tar sand deposits located? What are some drawbacks from obtaining oil from tar sands?Where is most of the worlds oil shales?
9 Formation of Mineral Deposits Ore - Metallic mineral that can be mined for $$$.Some of the most important mineral deposits form through…igneous processesAs the magma cools, heavy minerals settle to the bottomhydrothermal solutions -or- hot water solutionsAs the water cools metallic ion separate out of solutionplacer depositsGold is popular placer deposit!
10 Nonmetallic mineral resources Divided into two groupsBuilding materialsIndustrial mineralsName 4 nonmetallic minerals and their uses.
11 Alternative Energy Resources SolarNuclearWindHydroelectricGeothermalTidal
12 Using your textbook, outline each of the types of alternative energy resources on a separate sheet of paperYour outline should be in the following formatAlternative Energy Source (e.g. Solar Energy)Renewable, or nonrenewable?Simple description of how it works to capture energy in your own words.AdvantagesList…Disadvantages
13 Water, Air, and Land Resources Nearly 71% of Earth’s surface is water!About 2% fresh water1.6% of fresh water is ice at the polesLess than 1% of Earth’s fresh water is usable
14 Water Pollution There are two types of water pollution Point source pollutionComes from a known and specific location“You can point to it”Nonpoint source pollutionDoes not have a specific point of originDifficult to identify a specific sourceRunoffWater that flows over the land rather than seeping into the groundLargest source of water pollution in the United States!
15 Point source or nonpoint sources of water pollution?
16 The Atmosphere - Earth’s Blanket of Air Chemical composition helps maintain life on earthNitrogen - 78%Oxygen - 21%Trace gases - 1%CO2Argon
17 Air PollutionPollution can change the chemical composition of the air disrupting natural cycles.Burning of fossil fuels is a major source of air pollutionMotor vehiclesCoal and oil fired powerplants
18 Burning fossil fuels releases… Carbon MonoxideNitrogen OxideSootWhen they combine with water vapor in the air they create acid rainWhen they combine with sunlight smog is produced
19 Burning fossil fuels and Carbon Dioxide (CO2) CO2 is a Greenhouse GasGreenhouse gas traps heat from the sunThe amount of CO2 in the atmosphere has increased since the industrial revolution began in the 19th centuryThe increase in CO2 has altered the Carbon cycle and contributed to unnatural warming of the lower atmosphere (global warming)
20 Land ResourcesLand provides soil and forests, as well as mineral and energy resources.How do land resources impact your daily life?Soil - to grow the food you eatForests - to build your home, furniture, paper…Petroleum - Energy, plastics…Minerals - makeup, coins in your pocket…Removing and using these resources can take a heavy toll on the environment!
21 Strip mines - drastically changes the landscape Destroys vegetationCauses soil erosionCreates pollution contaminating soil and waterDestroys ecosystems
22 More damage to land resources… Agricultureextensive irrigation systemsFertilizersPesticidesGenetically modified foodForestry - Removal of virgin forestsEliminates diversity of plant and animal speciesLandfills and waste facilitiesPotential to leak toxics into soil and ground water
24 How many plastic water bottles do we throw away each year? Look it up…How many plastic water bottles do we throw away each year?Year?Day?Hour?Minute?Second?
25 Protecting Resources Each year we throw out about… 30 million cell phones8 million TV’s18 million computersEnough tires to circle the 3 timesEnough shrink wrap to wrap the state of Texas!We have 6% of the world’s population yet we produce 33% of the world’s garbage!
26 How can keep ourselves in check? Many think conservation and pollution prevention are the answers.Conservation is the careful use of resources.Pollution prevention means stopping pollution from entering the environment.
27 At your table, come up with 10 conservation methods you can use in your daily lives.
28 Keeping water clean and safe Government began passing laws to prevent and decrease pollution.Clean Water Act (1972): The CWA went after industries to reduce or eliminate point sources of pollution into surface waters.Safe Drinking Water Act (1974): helped protect drinking water resources.
29 Protecting the Air In 1970 congress passed the Clean Air Act. Nations most important air pollution lawBecause of the CAA: motor vehicles and power plants use control devices to reduce or eliminate harmful byproducts of fossil fuel combustionEnergy Conservation = Cleaner AirHow does turning off the lights when you’re not using them decrease air pollution?
30 Caring for Land Resources Preventing pollution and managing land resources wisely!FarmersContour plowing: plowing across a hillside reduces runoffUse of organic fertilizers and IPM (pesitcides as a last resort)ForestrySelective cutting rather than clear cutting: preserves habitats and conserves resources
31 What you can do to care for the land Start a compost pile!Practice using IPM (integrated pest management)Conserve water, and electricityThe three R’sReduceReuseRecycle