End Show Slide 1 of 21 Copyright Pearson Prentice Hall Biology

End Show Slide 2 of 21 Copyright Pearson Prentice Hall 6-1 A Changing Landscape

End Show 6-1 A Changing Landscape Slide 3 of 21 Copyright Pearson Prentice Hall Earth as an Island All organisms on Earth share a limited resource base and depend on it for their long-term survival. To protect these resources, we need to understand how humans interact with the biosphere.

End Show 6-1 A Changing Landscape Slide 4 of 21 Copyright Pearson Prentice Hall Human Activities What types of human activities can affect the biosphere?

End Show 6-1 A Changing Landscape Slide 5 of 21 Copyright Pearson Prentice Hall Human Activities Some human activities that affect the biosphere include: hunting and gathering agriculture industry urban development

End Show 6-1 A Changing Landscape Slide 6 of 21 Copyright Pearson Prentice Hall Agriculture The Green Revolution Started in the mid-twentieth century Increased global food production through  modern plant breeding  agricultural techniques. Over the last 50 years, the green revolution has helped world food production double!!!

End Show 6-1 A Changing Landscape Slide 7 of 21 Copyright Pearson Prentice Hall Agriculture Challenges for the Future While increasing world food supplies, modern agriculture has created ecological challenges. For example: Monoculture leads to problems with insect pests and diseases. Finding enough water for irrigation is difficult. Pesticides and fertilizers enter ecosystems

End Show 6-1 A Changing Landscape Slide 8 of 21 Copyright Pearson Prentice Hall Industrial Growth and Urban Development Human society and its impact on the biosphere were transformed by the Industrial Revolution, which added machines and factories to civilization.

End Show 6-1 A Changing Landscape Slide 9 of 21 Copyright Pearson Prentice Hall

End Show 6-1 A Changing Landscape Slide 10 of 21 Copyright Pearson Prentice Hall Industrial Growth and Urban Development The energy to power machinery comes mostly from fossil fuels—coal, oil, and natural gas. Suburban growth consumes farmland and stresses native plants and animals.

End Show - or - Continue to: Click to Launch: Slide 11 of 21 Copyright Pearson Prentice Hall 6-1

End Show Slide 12 of 21 Copyright Pearson Prentice Hall 6-1 Today, the most important source of environmental change on the planet is a.the green revolution. b.wild plants. c.humans. d.abiotic factors.

End Show Slide 13 of 21 Copyright Pearson Prentice Hall 6-1 The practice of planting a single crop in the same place year after year is called a.uniculture. b.monoculture. c.the green revolution. d.plant breeding.

End Show Slide 14 of 21 Copyright Pearson Prentice Hall 6-1 One problem with modern agriculture is that a.chemical fertilizers don’t work. b.chemical pesticides can damage beneficial insects. c.it has decreased world food production. d.new varieties of plants require little water.

End Show Slide 15 of 21 Copyright Pearson Prentice Hall 6-1 One impact of early hunting and gathering groups in North America might have been a.changing the climate from very cold to much warmer. b.the elimination of forests. c.a mass extinction of large mammals about 12,000 years ago. d.the development of large civilizations in Central and South America.

End Show Slide 16 of 21 Copyright Pearson Prentice Hall 6-1 Most of the energy for industry comes from a.the sun. b.nuclear power plants. c.moving water. d.fossil fuels.

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