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C2 C  Practice
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Transcript

  • 1. Journal Entry What is the environment ? Is the environment something that can be “ harmed ,” “ saved ,” “ preserved ,” or “ destroyed ”?
  • 2. Pause here Take 3 – 5 minutes
  • 3. Welcome back! Let’s continue
  • 4. What is Environmental Science?
    • We need to define environmental science and compare environmental science with ecology . We do this by identifying the five major fields of study that contribute to environmental science.
  • 5. What is Environmental Science?
    • Environmental Science is the study of the air, water, and land surrounding an organism or a community, which ranges from a small area to Earth’s entire biosphere.
  • 6. The Goal of Environmental Science
    • To accomplish this goal, environmental scientists study two main types of interactions between humans and their environment:
      • How our actions alter our environment.
      • The use of natural resources.
  • 7. Our Environment Through Time
    • For example, the environmental change that occurred on Manhattan Island over the last 300 years was immense, yet that period of time was just a “blink” in human history.
  • 8. Many Fields of Study
    • Ecology is they study of interactions of living organisms with one another and with their environment.
  • 9. Many Fields of Study
  • 10. Scientists as Citizens, Citizens as Scientists
    • Governments, businesses, and cities recognize that studying our environment is vital to maintaining a healthy and productive society.
    • Thus, environmental scientists are often asked to share their research with the world.
  • 11. Where and how we live …
    • Changes to the environment occurred as we progressed from hunter-gatherers, through the agricultural revolution, and into the Industrial Revolution.
  • 12. Hunter-Gatherers
    • Hunter-gatherers affect their environment in many ways:
      • Native American tribes hunted buffalo.
      • The tribes also set fires to burn prairies and prevent the grow of trees. This left the prairie as an open grassland ideal for hunting bison.
  • 13. Hunter-Gatherers
    • In North America, a combination of rapid climate changes and overhunting by hunter-gatherers may have led to the disappearance of some large mammal species, including:
    Giant Sloths Giant Bison Mastodons Cave Bear Saber Toothed Cats
  • 14. The Agricultural Revolution
    • Agriculture is the raising of crops and domesticated livestock for food or for other products that are useful to humans.
  • 15. The Agricultural Revolution
    • The agricultural revolution allowed human populations to grow at an unprecedented rate.
  • 16. The Agricultural Revolution
    • The agricultural revolution changed the food we eat.