1 / 23

Environmental Science

Environmental Science. What is Environmental Science?. Relationships between people and the natural environment. Interdisciplinary Broad field Ecology is a basic tool Goals Establish general principles about how the natural world functions Identifying, understanding, and solving problems.

alexa
Télécharger la présentation

Environmental Science

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. Environmental Science

  2. What is Environmental Science? • Relationships between people and the natural environment. • Interdisciplinary • Broad field • Ecology is a basic tool • Goals • Establish general principles about how the natural world functions • Identifying, understanding, andsolving problems

  3. What is Earth Science? • All the sciences that collectively seek to understand Earth and its neighbors in space. • Four Sciences: • Geology • Oceanography • Meteorology • Astronomy

  4. How are earth science, environmental science and people connected? People Earth Science Resources: -Renewable -Non-renewable Environment: -Biological -Physical Population growth Environmental problems Environmental science

  5. How do Earth scientists know all this stuff? • Observation • Experimentation • Understanding other sciences • Biology • Physics • Chemistry

  6. The Nature of Scientific Inquiry The Scientific Method • Collection of scientific facts through observation and measurement • Hypothesis: tentative explanations to observations • Extensive testing and analysis • Acceptance, modification or rejection • Models • Useful when dealing with natural processes that occur over very long periods of time (scales of time) or in inaccessible locations.

  7. The nature of Scientific Inquiry Theory Paradigms Theories that are extensively documented and explain a large number of interrelated aspects of the natural world. • A well tested and widely accepted view that the scientific community agrees best explains certain observable facts Scientific laws • A basic principle that describes a particular behavior of nature that is generally narrow in scope and can be sated briefly

  8. STUDYING EARTH FROM SPACE… pg 8. How can satellite images be used to study Earth from space? • Know the composition of Earth’s surface • Precipitation data • Understanding global climate change

  9. Scales of Space and Time

  10. The Nebular Hypothesis and Origins of Earth and the Solar System A. solar nebula B. contraction into rotating disk C. Cooling causing condensing into tiny (dust sized) solid particles D. Collisions between these form larger bodies E. These accrete to form planets Oceanography 100 Animations

  11. Earth’s Spheres

  12. HYDROSPHERE • Oceans  97% • Freshwater • Streams • Lakes • Glaciers • Underground

  13. Atmosphere • Life-giving gaseous envelope • ½ lies below an altitude of 5.6 km • 90 % occurs within just 16 km • Protects from the dangerous radiation emitted by the Sun. • Site of weather and climate

  14. Biosphere • All life on Earth • Depend and respond to their physical environment • Have an effect on their physical environment

  15. Geosphere Layers defined by composition: • Crust • Oceanic, 40 km, d= 3g/cm3 • Continental, 70 km, d = 2,7 g/cm3 • Mantle, 2900 km, d=3,4 g/cm3 • Core, d= 13 g/cm3

  16. Geosphere Layers defined by physical properties: • Lithosphere • Asthenosphere • Lower mantle • Outer core • Inner core

  17. Continental Drift and Plate Tectonics

  18. CONTINENTS Mountain belts OCEAN BASIN

  19. Earth as a System What is a SYSTEM? • Group of interacting parts that form a complex whole. • Two types: • Closed system: energy moves freely in and out, but matter does not enter or leave the system. • Open system: both matter and energy flow into and out of the system.

  20. Earth as a System • Within the Earth system, the spheres are interconnected.

  21. Earth as a System • Energy for the Earth system is powered by two sources: • Sun: drives external processes that occur in the atmosphere, hydrosphere and at Earth’s surface. • 2) Heat from Earth’s interior: powers internal processes that produce volcanoes, earthquakes and mountains.

  22. Sources • http://www.enov.co.uk/pages/Environment.html • http://www.myrrh-art.com/Levels_in%20Matter_T.html • http://volcano.oregonstate.edu/volcanoes-national-parks • http://www.northeducation.ac.th/elearning/ed_sc30/chap07/sc7112_1.html • http://animals.howstuffworks.com/marine-life/coral-reef.htm • http://www.kidsgeo.com/geography-for-kids/0040-introduction-to-our-atmosphere.php • http://sciencerevolution.net/dict_m.html • http://www.crystalinks.com/platetectonics.html • http://bumileluhur.blogspot.com/2011/01/seafloor-features.html • http://www.eoearth.org/article/Physiography_of_the_Earth's_terrestrial_surface

More Related