1 / 57

Bell Ringer

Bell Ringer. Which line is the predator? Which line is the prey? What happens to the predator population when the prey population decreases ? What causes the prey population to decrease?. T-Chart. Chapter 6. Humans in the Biosphere. The Effect of Human Activity.

creda
Download Presentation

Bell Ringer

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. Bell Ringer Which line is the predator? Which line is the prey? What happens to the predator population when the prey population decreases? What causes the prey population to decrease?

  2. T-Chart

  3. Chapter 6 Humans in the Biosphere

  4. The Effect of Human Activity • Humans affect global environments through: • Agriculture • Development • Industry • Resources that are affected: • Soil • Water • Atmosphere

  5. Agriculture • One of the most important inventions in human history • Encouraged the growth of modern civilizations • Monoculture- planting the same crop in the same spot year after year. • Negatives: • Use of water, soil, and fossil fuels

  6. Development • Americans live in dense populated urban areas • Too crowded Developed Suburbs • More People = More Waste • Negatives: • Consumes farmlands, destroys natural habitats • Waste affects air, water, and soil

  7. Industrial Growth • Inspired by the Industrial Revolution of the 1800s • Needed to provide the United States with up to date technology • Negatives: • Requires A LOT of energy • Industries have traditionally discarded wastes directly into the air, water, soil

  8. Sustainable Development • Sustainable Development- provides for human needs while preserving the ecosystems that produce natural resources • Should do more than just enable people to survive, it should help them improve their situation. • Examples: Solar Power, Wind Energy, Etc.

  9. Renewable and Nonrenewable Resources • Renewable Resources- can be produced or replaced by a healthy ecosystem • Example: white pine tree, can grow back after being cut down • Nonrenewable Resources- Natural processes can not replenish them in a reasonable amount of time. • Example: Fossil fuels take millions of years to renew

  10. Class Assignment • Silently, list how humans are affecting the south shore or greater Chicago area environment. Give an example of each.

  11. Closure • Write the conclusion section for our class MEL-Con. Generate 2 ideas for sustainable development and how it might help solve the problems that we listed earlier.

  12. Bell Ringer • What three human activities have transformed the biosphere? • USE YOUR NOTES

  13. 6.1 Review • 3 human affectivities that affect biosphere: • Agriculture- Farming • Development-Urbanization, creating suburbs • Industrial Growth-Factories, mass production • Resources that are affected: • Soil • Water • Atmosphere

  14. 6.2 Using Resources Wisely • Key Questions: • Why is soil important, and how do we protect it? • What are the primary sources of water pollution? • What are the major forms of air pollution?

  15. Soil Resources • Soil Erosion-removal of soil by water or wind • Dust Bowl • Desertification- Process of farmland turning into desert • Causes: • Farming, overgrazing, drought, and climate change

  16. Soil Resources • Deforestation-Loss of forests • Leads to severe soil erosion • Trees help keep the soil in place, absorb carbon dioxide, and protects fresh water supplies • Over half the worlds old-growth forest have been lost to deforestation

  17. Soil Resources • How can we protect our soil?

  18. Freshwater Resources • Humans depend on fresh water for: • Drinking water • Industry • Transportation • Energy • Waste disposal

  19. Water Pollution • Pollutant-a harmful material that can enter the biosphere • Point source pollution-enters from single source • Example:Oil spill or factory • Nonpoint source pollution: enters from many sources • Example: Run-off from the road or chemicals released into the air by cars and factories

  20. Main Sources of Pollution • Industrial and agriculture chemicals • Residential sewage • Nonpoint sources

  21. Biological Magnification • Occurs when a pollutant, such as DDT, is picked up by an organism and is not broken down or eliminated from its body. • Travels through the energy pyramid

  22. Water Pollution • What are the primary sources of water pollution? • How can we stop water pollution?

  23. Class Assignment • By yourself, work on the chapter 6.2 handout

  24. Class Activity • Individually, list a couple human activities that affect the south shore community environment.

  25. Class Activity • As a group, discuss the factors that you just listed. Group every factor into categories.

  26. Bell Ringer • List two ways to prevent soil erosion. • List 2 ways to reduce water pollution. • USE YOUR NOTES

  27. 6.2 Continued • What are the major forms of air pollution?

  28. Atmospheric Resources • Atmosphere • Absorbs harmful ultraviolet radiation • Provides oxygen • Regulates global temperature (without greenhouse effect, earth would be 30 degrees Celsius cooler)

  29. Air Pollution • Common forms of air pollution are: • Smog • Acid rain • Greenhouse gases

  30. Air Pollution • Smog- Gray-brown haze formed by chemical reactions among pollutants released into the air

  31. Acid Rain • Acid Rain • Caused by releasing nitrogen and sulfur into air • Combine to form nitric and sulfuric acid • Can kill plants • Can change composition of soil

  32. Greenhouse Gases • Come from: • Cars • Cows • Industry • Homes • Agriculture • Definition- Carbon gases that are released into the atmosphere that contribute to global warming and climate change

  33. Class Assignment • Pg. 182 #1-7

  34. Bell Ringer • Get your notes out and study for the 6.1 and 6.2 vocabulary quiz. (5 minutes)

  35. Corners Activities • After hearing the statement read by your teacher, please walk respectfully to the corner that you agree with most: Strongly Agree, Agree, Disagree, Strongly Disagree

  36. Statement #1 • The laws against trading ivory should be lifted. This will improve the global economy and get the United States out of this recession.

  37. Statement #2 • Crops are needed in order for humans to survive. Even though growing crops can cause soil erosion and hurt natural habitats, humans should continue to grow crops because they are needed to help humans survive.

  38. Statement #3 • Humans are the main reason why some natural habitats are no longer able to support the plant and animal populations that were once in that natural habitat.

  39. Biodiversity • Biodiversity- total of all the genetically based variation in all organisms in the biosphere.

  40. Types of Biodiversity • Ecosystem diversity- variety of habitats, communities, and ecological processes • Species diversity- number of different species in the biosphere, or in a particular area. • Genetic Diversity- sum total of all different forms of genetic information carried by a particular species

  41. Threats to Biodiversity • Five threats: • Altered Habitats- habitats eliminated for urban or agriculture reasons • Habitat Fragmentation-development causes habitats to split • Hunting and the Demand for Wildlife Products- Causes extinction • Introduced Species- • Example- Asian Carp • Pollution • Example- DDT (Biological Magnification) • Climate Change

  42. Conserving Biodiversity • Ecological hot spot- place where significant numbers of species and habitats are in immediate danger of extinction.

  43. Class Assignment • Complete the 6.3 worksheet • Use your textbook and notes

  44. Bell Ringer • What are the five major threats to biodiversity? (Use your notes) • Who is responsible for these threats on biodiversity?

  45. Homework Review • Take out your chapter 6.3 worksheet for review

  46. Causes • Deforestation • Air Pollution • Water Pollution • Development • Industrial Growth

  47. Bell Ringer • Explain why a paper company would say that deforestation is not as bad as people make it out to be. • At least 3 sentences • Use “Lorax” notes/worksheet

  48. Chapter 6.4 Key Questions • How does the average ecological footprint in America compare to world’s average? • How can ecology guide us toward a sustainable future?

More Related