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Earth’s Resources Chap. 25 Resources Land Resources Air Resources Water Resources Notes: Quizzes: Section Assessments Practice Test Questions.

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Presentation on theme: "Earth’s Resources Chap. 25 Resources Land Resources Air Resources Water Resources Notes: Quizzes: Section Assessments Practice Test Questions."— Presentation transcript:

1 Earth’s Resources Chap. 25 Resources Land Resources Air Resources Water Resources Notes: Quizzes: Section Assessments Practice Test Questions

2 Resources

3 I.What is a natural resource? Commodity that has value in its unmodified state.

4 I.What is a natural resource? A.Renewable Resource

5 I.What is a natural resource? A.Renewable Resource Resource that is depleted more slowly than it is replenished.

6 I.What is a natural resource? A.Renewable Resource 1.Living things

7 Living Renewable Resources Lumber/Paper Crops Fish Cattle/Sheep Chickens

8 I.What is a natural resource? A.Renewable Resource 1.Living things 2.Non-living things

9 Non-living Renewable Resources Sunlight Fresh air Fresh water Soil

10 I.What is a natural resource? A.Renewable Resource B.Nonrenewable Resource Resources that cannot be easily replaced

11 Nonrenewable Resources Fossil fuels Precious stones Gold/Copper/Silver Uranium

12 I.What is a natural resource? II. Where are natural resources?

13 The End

14 Land Resources

15 I.Protected land Yellowstone

16 I.Protected land A.About 42% of US is public land

17 I.Protected land A.About 42% of US is public land B.National parks preserve land Sequoia Nat. Park

18 I.Protected land A.About 42% of US is public land B.National parks preserve land C.Wildlife refuges protect animals’ natural habitats

19 II.Soil

20 A.Soil takes 1000 years to form

21 II.Soil A.Soil takes 1000 years to form B.Poor farming/overgrazing can lead to desertification

22 III. Materials A.Bedrock – limestone, granite, marble B.Aggregates – mixtures of rocks/sand C.Ores – material that is profitable to mine

23 The End

24 Air Resources

25 I.Oxygen

26 A.Makes up about 21% of air.

27 I.Oxygen A.Makes up about 21% of air. B.Believed to be introduced to atmosphere about 4.5 bya.

28 I.Oxygen A.Makes up about 21% of air. B.Believed to be introduced to atmosphere about 4.5 bya. C.Recycled primarily by photosynthesis.

29 II.Disruption of Earth’s Cycles

30 A.Carbon cycle

31 II.Disruption of Earth’s Cycles A.Carbon cycle 1.Increases Earth’s surface temp.

32 II.Disruption of Earth’s Cycles A.Carbon cycle 1.Increases Earth’s surface temp. 2.Changes rainfall patterns

33 II.Disruption of Earth’s Cycles A.Carbon cycle B.Nitrogen cycle 1.Burning fossil fuels releases nitrogen compound into the atmosphere 2.These compounds may become acid rain.

34 III. Air pollution Condition in which pollutants in the air become harmful to human health.

35 III. Air pollution A.Natural

36 III. Air pollution A.Natural

37 III. Air pollution A.Natural B.Man-made (anthropogenic)

38 III. Air pollution A.Natural B.Man-made (anthropogenic) C.Indoor air pollution

39 Indoor Air Pollution

40 III. Air pollution A.Natural B.Man-made (anthropogenic) C.Indoor air pollution D.Radon gas

41 Radon gas Called radon-222Called radon-222

42 Radon gas Called radon-222Called radon-222 Colorless, odorless, tasteless, naturalColorless, odorless, tasteless, natural

43 Radon gas Called radon-222Called radon-222 Colorless, odorless, tasteless, naturalColorless, odorless, tasteless, natural Forms when uranium-238 decaysForms when uranium-238 decays

44 Radon gas Called radon-222Called radon-222 Colorless, odorless, tasteless, naturalColorless, odorless, tasteless, natural Forms when uranium-238 decaysForms when uranium-238 decays Seeps upward through cracksSeeps upward through cracks

45 Radon gas Called radon-222Called radon-222 Colorless, odorless, tasteless, naturalColorless, odorless, tasteless, natural Forms when uranium-238 decaysForms when uranium-238 decays Seeps upward through cracksSeeps upward through cracks Has cause about 13,000 lung cancer deathsHas cause about 13,000 lung cancer deaths

46 The End

47 Water Resources

48 I.Water facts

49 A.It covers about 71% of Earth’s surface.

50 I.Water facts A.It covers about 71% of Earth’s surface. B.The oceans contain 97% of Earth’s water.

51 I.Water facts A.It covers about 71% of Earth’s surface. B.The oceans contain 97% of Earth’s water. C.Most animals are about 50- 60% water.

52 II.Water properties

53 A.Exists as a liquid over a large temperature range.

54 II.Water properties A.Exists as a liquid over a large temperature range. B.Has a large heat-storage capacity.

55 II.Water properties A.Exists as a liquid over a large temperature range. B.Has a large heat-storage capacity. C.Dissolves many substances.

56 II.Water properties A.Exists as a liquid over a large temperature range. B.Has a large heat-storage capacity. C.Dissolves many substances. D.Solid water expands.

57 III. Use of Freshwater

58 A.Some sources of freshwater include... III. Use of Freshwater

59 A.Some sources of freshwater include... B.Use of freshwater includes... III. Use of Freshwater

60 IV. Managing Freshwater

61 A.Dams and Reservoirs capture water. This may be used for... IV. Managing Freshwater

62 Three Gorges Dam (China)

63 PROS:

64 Three Gorges Dam (China) PROS: Clean energy source Increased shipping Better control of flooding.

65 CONS: Three Gorges Dam (China)

66 CONS: Very costly ($27 billion) River will fill with silt Displaces 1.4 million people. Three Gorges Dam (China)

67 A.Dams and Reservoirs capture water. This may be used for... B.Water is transported through aqueducts and pipes. IV. Managing Freshwater

68 California Water Most precipitation occurs in the _______ part of CA.Most precipitation occurs in the _______ part of CA. Most people live in the ______ part of CA.Most people live in the ______ part of CA.

69 IV. Managing Freshwater

70 A.Dams and Reservoirs capture water. This may be used for... IV. Managing Freshwater

71 A.Dams and Reservoirs capture water. This may be used for... B.Water is transported through aqueducts and pipes. IV. Managing Freshwater

72 A.Dams and Reservoirs capture water. This may be used for... B.Water is transported through aqueducts and pipes. C.Groundwater is pumped from aquifers. Too much withdrawal causes drawdown. IV. Managing Freshwater

73 V. Desalination

74 A.Salt water is distilled. V. Desalination

75 A.Salt water is distilled. B.This process can be slow and expensive. V. Desalination

76 A.Salt water is distilled. B.This process can be slow and expensive. C.Reducing use. V. Desalination

77 A.Salt water is distilled. B.This process can be slow and expensive. C.Reducing use. V. Desalination 1.Farmers change watering techniques.

78 A.Salt water is distilled. B.This process can be slow and expensive. C.Reducing use. V. Desalination 1.Farmers change watering techniques. 2.Domestic users change habits.

79

80 The End


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