1 / 106

Chapter Menu

Chapter Introduction Lesson 1 People and the Environment Lesson 2 Impacts on the Land Lesson 3 Impacts on Water Lesson 4 Impacts on the Atmosphere Chapter Wrap-Up. Chapter Menu. How do human activities impact the environment?. Chapter Introduction. What do you think?.

roysanders
Télécharger la présentation

Chapter Menu

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. Chapter Introduction Lesson 1 People and the Environment Lesson 2 Impacts on the Land Lesson 3Impacts on Water Lesson 4 Impacts on the Atmosphere Chapter Wrap-Up Chapter Menu

  2. How do human activities impact the environment? Chapter Introduction

  3. What do you think? Before you begin, decide if you agree or disagree with each of these statements. As you view this presentation, see if you change your mind about any of the statements. Chapter Introduction

  4. 1. Earth can support an unlimited number of people. 2. Humans can have both positive and negative impacts on the environment. 3. Deforestation does not affect soil quality. 4. Most trash is recycled. Do you agree or disagree? Chapter Introduction

  5. 5. Sources of water pollution are always easy to identify. 6. The proper method of disposal for used motor oil is to pour it down the drain. 7. The greenhouse effect is harmful to life on Earth. 8. Air pollution can affect human health. Do you agree or disagree? Chapter Introduction

  6. People and the Environment • What is the relationship between resource availability and human population growth? • How do daily activities impact the environment? Lesson 1 Reading Guide - KC

  7. People and the Environment • population • carrying capacity Lesson 1 Reading Guide - Vocab

  8. Population and Carrying Capacity A population is all the members of a species living in a given area. population from Latin populus, means “people” Lesson 1-1

  9. Population and Carrying Capacity (cont.) Today, about 6.7 billion people live on Earth. Lesson 1-1

  10. Population and Carrying Capacity (cont.) • The greatest increase in human population occurred during the last few centuries. • Population explosion describes the sudden rise in human population that has happened in recent history. Lesson 1-1

  11. Population and Carrying Capacity (cont.) • Carrying capacity is the largest number of individuals of a given species that Earth’s resources can support and maintain for a long period of time. • Earth has limited resources and cannot support a population of any species in a given environment beyond its carrying capacity. Lesson 1-1

  12. Population and Carrying Capacity (cont.) If the human population continues to grow beyond Earth’s carrying capacity, eventually Earth will not have enough resources to support humans. What is the relationship between the availability of resources and human population growth? Lesson 1-1

  13. Impact of Daily Actions Each of the 6.7 billion people on Earth uses resources in some way and the use of these resources affects the environment. resource Science Use a natural source of supply or support Common Use a source of information or expertise Lesson 1-2

  14. Impact of Daily Actions(cont.) What are three things you did today that impacted the environment? Lesson 1-2

  15. Human population has exploded since the 1800s. • Every day billions of people use Earth’s resources. • The human population will eventually reach its carrying capacity. Lesson 1 - VS

  16. When humans use resources, they can have both negative and positive impacts on the environment. • It is important for humans to use resources wisely. Lesson 1 - VS

  17. About how many people live on Earth today? A. about 100 million B. about 6.7 billion C. about 10 billion D. about 67 billion Lesson 1 – LR1

  18. Which phrase describes the change in human population in recent history? A. decreasing carrying capacity B. decreased life span C. increasing carrying capacity D. population explosion Lesson 1 – LR2

  19. If the human population grows beyond Earth’s carrying capacity, which of the following will likely be true? A. Earth will be able to support humans for several thousand years. B. Earth will continue providing unlimited resources. C. Earth will not have enough resources to support humans. D. There will be a population explosion. Lesson 1 – LR3

  20. 1. Earth can support an unlimited number of people. 2. Humans can have both positive and negative impacts on the environment. Do you agree or disagree? Lesson 1 - Now

  21. Impacts on the Land • What are the consequences of using land as a resource? • How does proper waste management help prevent pollution? • What actions help protect the land? Lesson 2 Reading Guide - KC

  22. Impacts on the Land • deforestation • desertification • urban sprawl • reforestation • reclamation Lesson 2 Reading Guide - Vocab

  23. Using Land Resources • Deforestation is the removal of large areas of forests for human purposes. • Deforestation affects soil and air quality. Brand X Pictures/Punchstock Lesson 2-1

  24. Using Land Resources(cont.) • Scientists estimate that human activities have doubled the amount of nitrogen cycling through the ecosystems. • Excess nitrogen can kill plants adapted to low nitrogen levels and affect animals that depend on those plants for food. Lesson 2-1

  25. The Nitrogen Cycle Lesson 2-1

  26. Using Land Resources(cont.) • Desertification is the development of desert-like conditions due to human activities and/or climate change. • A region of land that undergoes desertification is no longer useful for food production. Lesson 2-1

  27. Though mines are essential for obtaining much-needed resources, digging mines disturbs habitats and changes the landscape. Photodisc/Getty Images Lesson 2-1

  28. Using Land Resources(cont.) What are some consequences of using land as a resource? Lesson 2-1

  29. Construction and Development • The development of land for houses and other buildings near a city is called urban sprawl. • The impacts of urban sprawl include habitat destruction, loss of farmland, and an increase in runofff that can reduce the water quality of streams, rivers and groundwater. Lesson 2-2

  30. Waste Management • Landfills are areas where trash is buried. • A landfill is carefully designed to meet government regulations. • Hazardous waste cannot be placed in landfills because it contains harmful substances that can affect soil, air, and water quality. Lesson 2-3

  31. Lesson 2-3

  32. Waste Management(cont.) What is done to prevent the trash in landfills from polluting air, soil, and water? Lesson 2-3

  33. Positive Actions • Governments, society, and individuals can work together to reduce the impact of human activities on land resources. • Protected forests and parks are important habitats for wildlife. • Reforestation involves planting trees to replace trees that have been cut or burned down. Lesson 2-4

  34. Positive Actions(cont.) Reclamation is the process of restoring land disturbed by mining. reclamation from Latin reclamare, means “to call back” Lesson 2-4

  35. Positive Actions(cont.) • Green spaces are areas that are left undeveloped or lightly developed. • Individuals can have a big impact on land-use issues by practicing the three Rs—reusing, reducing, and recycling. Lesson 2-4

  36. Positive Actions(cont.) What can you do to help lessen your impact on the land? Lesson 2-4

  37. Deforestation, agriculture, and mining for useful rocks and minerals all can affect land resources negatively. • People use land for living space, which can lead to urban sprawl, an increase in roadways, and the need for proper waste disposal. Lesson 2 - VS

  38. Creating national parks, preserves and local green spaces, reforestation, and practicing the three Rs are all ways people can positively impact land resources. Lesson 2 - VS

  39. Landfills do which of the following to control pollution? A. cover the landfill with clay and dirt B. line the landfill with sand or gravel C. monitor the quality of underground oxygen D. use groundwater to dilute liquid wastes Lesson 2 – LR1

  40. Which of these describes areas where trash is buried? A. runoff B. landfill C. urban sprawl D. none of these Lesson 2 – LR2

  41. Which of these is NOT an impact of urban sprawl? A. loss of farmland B. increase in runoff C. habitat destruction D. fewer cars on highways Lesson 2 – LR3

  42. Do you agree or disagree? 3. Deforestation does not affect soil quality. 4. Most trash is recycled. Lesson 2 - Now

  43. Impacts on Water • How do humans use water as a resource? • How can pollution affect water quality? • What actions help prevent water pollution? Lesson 3 Reading Guide - KC

  44. Impacts on Water • point-source pollution • nonpoint-source pollution Lesson 3 Reading Guide - Vocab

  45. Water as a Resource Most water use in the United States is by power plants to generate electricity and to cool equipment. Lesson 3-1

  46. Water as a Resource(cont.) How do humans use water as a resource? Lesson 3-1

  47. Sources of Water Pollution Point-source pollution is pollution from a single source that can be identified. pollution from Latin polluere, means “to contaminate” Lesson 3-2

  48. Sources of Water Pollution(cont.) • Pollution from several widespread sources that cannot be traced back to a single location is called nonpoint-source pollution. • Most of the water pollution in the United States comes from nonpoint sources and is therefore harder to control. Lesson 3-2

  49. Sources of Water Pollution Lesson 3-2

  50. Sources of Water Pollution Lesson 3-2

More Related