Understanding Our Environment


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Understanding Our Environment

  1. 1. Understanding Our Environment Ecology I Mr. Nettles
  2. 2. Class Motto <ul><li>Discipline fuels character! </li></ul><ul><li>Character builds hope! </li></ul><ul><li>Hope assures your future! </li></ul>
  3. 3. Agenda- Monday, January 23, 2012 <ul><li>Warm Up </li></ul><ul><li>“ Understanding Our Environment” </li></ul><ul><li>Wrap Up (LIA) </li></ul><ul><li>A-Plus </li></ul>
  4. 4. Today’s Objectives <ul><li>Define environmental science, ecology, agriculture, natural resource, pollution, and biodiversity </li></ul><ul><li>Compare ecology and environmental science. </li></ul><ul><li>List the five major fields of study that contribute to environmental science. </li></ul><ul><li>Describe the major environmental effects of hunter-gatherers, the agricultural revolution, and the Industrial Revolution. </li></ul><ul><li>Classify environmental problems into three major categories. </li></ul>
  5. 5. Warm Up (Jan. 23) <ul><li>How do you define the term environment ? </li></ul><ul><li>Are humans part of the environment ? </li></ul><ul><li>How can science help us understand and solve environmental problems ? </li></ul>
  6. 6. What is Environmental Science? <ul><li>Environmental Science = the study of how humans interact with the environment </li></ul><ul><li>The environment includes the natural world, the complex web of relationships between living things, and everything produced by humans . </li></ul>
  7. 7. The Goals of Environmental Science <ul><li>A major goal of environmental science is to understand and solve environmental problems. </li></ul><ul><li>To accomplish this goal, environmental scientists study two main types of interactions between humans and their environmen t: </li></ul><ul><ul><li>The use of natural resources. </li></ul></ul><ul><ul><li>How our actions change our environment. </li></ul></ul>
  8. 8. Key Question <ul><li>How do ecology and environmental science differ? </li></ul><ul><ul><li>Remember that ecology is the study of the relationships that living organisms have with each other and their natural environment. </li></ul></ul><ul><li>Answer : Ecology involves the study of ALL living things interacting with the environment whereas Environmental Science involves ONLY humans interacting with the environment. </li></ul>
  9. 9. 5 Major Fields of Study that Contribute to Environmental Science <ul><li>Biology - the study of living organisms </li></ul><ul><li>Earth Science – the study of Earth’s nonliving systems and the planet as a whole </li></ul><ul><li>Physics – the study of matter and energy </li></ul>
  10. 10. 5 Major Fields of Study that Contribute to Environmental Science <ul><li>Chemistry – the study of chemicals and their interactions. </li></ul><ul><li>Social Sciences – the study of human populations </li></ul>
  11. 11. Stages of Our Environment Through Time <ul><li>Hunter-Gatherers </li></ul><ul><ul><li>Hunter-Gathers are the earliest group of people who obtained food by collecting plants, hunting, and scavenging the remains of animals. </li></ul></ul><ul><ul><li>They affected the environment by: </li></ul></ul><ul><ul><ul><li>overhunting large game animals, which led to the extinction of animals such as the giant bison and saber-toothed tiger </li></ul></ul></ul><ul><ul><ul><li>spreading different plant species around the world by traveling from place to place </li></ul></ul></ul>
  12. 12. Stages of Our Environment Through Time <ul><li>The Agricultural Revolution </li></ul><ul><ul><li>Agriculture – the practice of growing, breeding, and caring for plants and animals that are used for food, clothing, housing, and transportation. </li></ul></ul><ul><ul><li>Began in many different parts of the world 10,000 years ago </li></ul></ul><ul><ul><li>Started with hunter-gatherers planting seeds from plants they gathered and breeding animals from their local environments </li></ul></ul><ul><ul><li>Developing farmlands out of rainforests caused harm to the environment through soil loss, floods, and water shortage. </li></ul></ul>
  13. 13. Stages of Our Environment Through Time <ul><li>The Industrial Revolution </li></ul><ul><ul><li>Involved a shift from energy sources such as animal muscle and running water to fossil fuels such as coal and oil </li></ul></ul><ul><ul><li>Made producing food and goods much faster and less expensive </li></ul></ul><ul><ul><li>Improved the quality of life for people in ways such as the invention of the light bulb and improvement of medical care </li></ul></ul><ul><ul><li>Produced environmental problems such as pollution and habitat loss </li></ul></ul>
  14. 14. 3 Main Environmental Problems <ul><li>Resource Depletion </li></ul><ul><ul><li>Natural Resource – any natural material that is used by humans </li></ul></ul><ul><ul><ul><li>Renewable Resources can be replace quickly by a natural process . Examples include water, air, soil, and trees . </li></ul></ul></ul><ul><ul><ul><li>Nonrenewable Resources are used at a much faster rate than they are made . Examples are minerals and fossil fuels. </li></ul></ul></ul><ul><ul><li>Resources become depleted when a large amount of them become used up. </li></ul></ul>
  15. 15. 3 Main Environmental Problems <ul><li>Pollution: </li></ul><ul><ul><li>Pollution – an undesired change in air, water, or soil that badly affects the health, survival, or activities of living things. </li></ul></ul><ul><ul><ul><li>Biodegradable Pollutants can be broken down by natural processes . An example is human sewage . </li></ul></ul></ul><ul><ul><ul><li>Non-degradable Pollutants are not broken down easily and can build up to dangerous toxic levels in the environment . Examples are lead and mercury. </li></ul></ul></ul><ul><ul><li>Most pollution today is caused by human activity. </li></ul></ul>
  16. 16. 3 Main Environmental Problems <ul><li>Loss of Biodiversity: </li></ul><ul><ul><li>Biodiversity – the number and variety of species that live in an area. </li></ul></ul><ul><ul><li>Much of the Earth’s biodiversity has been loss due to extinction . </li></ul></ul>
  17. 17. Wrap Up (Jan. 23) <ul><li>What was one fact that you Learned today? </li></ul><ul><li>What was the most Interesting thing about today’s class? </li></ul><ul><li>How can you Apply or use the information that you learned today? </li></ul>
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