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This lesson will increase your knowledge of concepts covered in the following TEKS for biology: - PowerPoint PPT Presentation


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This lesson will increase your knowledge of concepts covered in the following TEKS for biology:. 12.a – Analyze the flow of energy through various cycles including the carbon, oxygen, nitrogen, and water cycles.

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slide1

This lesson will increase your knowledge of concepts covered in the following TEKS for biology:

12.a – Analyze the flow of energy through various cycles including the carbon, oxygen, nitrogen, and water cycles.

12.c – Compare variations, tolerances, and adaptations of plants and animals in different biomes

12.d – Identify and illustrate that long-term survival of species is dependent on a resource based that may be limited.

slide3

QUESTION: What happened in Ireland when an agricultural crop failed and what are the implications about our dependence on pesticides?

slide4

Ireland suffered a famine because their crops were genetically uniform and they lacked pesticide technologyToday, farmers rely on pesticides to protect their crops

Based on: Population Reports, May 1992

slide5

QUESTION: Some people question the need for environmental legislation. Using the bald eagle, make a case that environmental legislation can help preserve natural ecosystems.

slide6

Once the eagle was protected by the Endangered Species Act and DDT was banned, eagle populations increased rapidly. The bald eagle is now listed as threatened.

From: Time, July 11, 1994

slide8

Organic Foods

Certified organic foods cannot be produced with hormones, antibiotics, herbicides, insecticides, chemical fertilizers, genetic modification or germ-killing radiation

From: Newsweek, September 30, 2002

overview of lesson
Overview of Lesson
  • Humans and freshwater
  • Global water cycle
  • Biomes
  • Water availability in Texas
  • The future
slide11

The quality of human life is directly proportional to the amount of available freshwater per person

slide12

Humans are 55-60% water and can only live days without fresh water. Why is there so much water in the human body?

slide13

Circulatory System

Based on: Mader, S., Inquiry into Life, McGraw-Hill

slide14

Urinary System

Based on: Mader, S., Inquiry into Life, McGraw-Hill

slide15

Many of the agricultural systems that feed humans are dependent on irrigation with freshwater. Why do plants need water?

Photo courtesy of Texas Department of Transportation

slide16

All agricultural systems are based on plants converting the energy of the sun to the energy of sugar through the process of photosynthesis

energy of the sun + carbon dioxide + water

energy of sugar + oxygen

overview of lesson1
Overview of Lesson
  • Humans and freshwater
  • Global water cycle
  • Biomes
  • Water supply in Texas
  • The future
slide18

Less than 3% of Earth’s water is freshwater

  • The rest is too salty for human consumption or agriculture
slide19

Water Cycle

Based on: Goodenough, et al., Human Biology, Saunders College

Data from Jackson, et al., Ecological Applications, vol. 11, 2001

overview of lesson2
Overview of Lesson
  • Humans and freshwater
  • Global water cycle
  • Precipitation and biomes in U.S.
  • Water supply in Texas
  • The future
slide21

Biome Distribution

Based on: Mader, S., Inquiry into Life, McGraw-Hill

slide22

Air movement patterns across U.S.

Pacific Moisture

Based on: Transactions of the American Fisheries Society, November 1981

slide23

Mountains and Rain Shadows

Condensation occurs when air cools as it rises over mountains, resulting in precipitation on the western side of the mountain. As the air moves down from mountains, evaporation tends to occur.

slide24

Major Biomes of the U.S.

Based on: Mader, S., Inquiry into Life, Wm. C. Brown, Publishers

slide26

Photo courtesy of G. Kroh

Photo courtesy of G. Kroh

California Redwoods

slide27

Photo courtesy of G. Kroh

Great Basin Desert in the

Rain Shadow of the Sierras

slide28

Photo courtesy of G. Kroh

Meadow in the Rocky Mountains

slide29

Photo courtesy of G. Kroh

High Plains of Texas Panhandle

slide30

Photo courtesy of G. Kroh

Deciduous Forest of East Texas

overview of lesson3
Overview of Lesson
  • Humans and freshwater
  • Global water cycle
  • Biomes
  • Water supply in Texas
  • The future
slide32

Typical paths of movement of the various cold and warm air masses that invade Texas

Based on: Texas Weather

slide34

Most of the surface water is in the eastern side of Texas

From: Texas Parks & Wildlife, July 2002

slide35

Texas rivers are one the State’s most important natural resources

Photo courtesy of R. Drenner

Brazos River near Mineral Wells

slide36

Texas rivers are now impounded by more than 200 major dams. All lakes but one (Caddo Lake) are formed by dams.

Photo courtesy of R. Drenner

Possum Kingdom Lake on Brazos River

water treatment process fort worth

Water Treatment Process, Fort Worth

From City of Fort Worth

1. Reservoirs provide water

2. Raw water pump station pumps water to treatment plant

3. Flash mix of chemicals to clump particles and increase settling

plus charcoal to absorb taste and odor from bluegreen algae

4. Coagulation basin where particles clump

5. Sedimentation basin where particles settle to bottom

6. Filters consisting of 4 ft of coal, sand and gravel

7. Disinfection using chlorine (ozone used in future)

8. Clearwell storage before water is pumped to the public

9. Distribution through 2,400 mile of pipelines to homes and

businesses

overview of lesson4
Overview of Lesson
  • Humans and freshwater
  • Global water cycle
  • Biomes
  • Water supply in Texas
  • The future
slide39

Water Fights

Based on: U.S. News & World Report, May 19, 2003

slide40

The population of Texas will double in the next 50 years

Based on: Texas Parks & Wildlife, July 2002

slide41

The Future?

  • Only eight more major dams will
  • be built in the next 50 years
  • Almost 900 Texas cities will not
  • have enough water from current
  • sources to meet their needs in
  • 2050
slide42

Texas cities are requiring water conservation measures such as low-volume toilets while promoting volunteer xeriscaping

slide43

Xeriscapingis a method of landscaping that uses plants that are well adapted to the local area and are drought-resistant

slide45

Water Supply System for Fort Worth

Village Creek Sewage Treatment Plant

Trinity River

Wetland

slide47

Decline in Wetland Acreage

From Scientific American, June 1998

slide48

Next Lesson

Acid Rain and Fishless Lakes