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Science 10

Science 10. Aim: Intro to Energy Flow in Global Systems. Agenda. Go over Unit test Intro to Energy Flow in Global Systems Next class. Defining Systems. System :  The part of the universe you wish to study. Surroundings:  Anything outside the system. Types of Systems.

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Science 10

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  1. Science 10 • Aim: Intro to Energy Flow in Global Systems

  2. Agenda • Go over Unit test • Intro to Energy Flow in Global Systems • Next class

  3. Defining Systems System:  The part of the universe you wish to study. Surroundings:  Anything outside the system.

  4. Types of Systems Isolated System: • Does not exchange any matter or energy with its surroundings Example: - A good thermos

  5. Types of Systems Closed System: • Exchanges energy with its surroundings, but not matter Example: Chemical reaction that gives off heat in a stoppered flask.

  6. Types of Systems Open System: • Exchanges both matter and energy with its surroundings. Example: heating up an Open container of water.

  7. The Biosphere(the living globe) Our system of water, land and air

  8. The Biosphere(the living globe) The biosphere requires a constant supply of energy to function.

  9. The Biosphere(the living globe) The sun delivers this energy daily.

  10. The Biosphere(the living globe) Consists of three components: 1) Atmosphere 2) Hydrosphere 3) Lithosphere

  11. The Biosphere: Atmosphere • A thin layer of well mixed gasses (mostly nitrogen (78%) and oxygen (21%)) surrounding the Earth. • Allows vital light rays to pass through to the Earth but shields us against lethal radiation.

  12. The Biosphere: Atmosphere Most of the atmosphere is concentrated in the lower 2 layers: • Troposphere: 0 – 12 km high • Stratosphere: 13 – 50 km high, • Mesophere: 50 – 80 km high • Thermosphere : 80km – 300 km

  13. The Biosphere: Atmosphere • O2and O3 (ozone) in the outermost layers of the atmosphere absorb most of the harmful ultraviolet type radiation. Most of which is in the stratosphere. • Also burns most meteorites.

  14. Hydrosphere: • All of the Earth’s water (Includes water in the air and ground water). • The hydrologic cycle is the evaporation and condensation of the Earth’s water. • Water continuously cycles in and out of the atmosphere.

  15. Hydrosphere: • Clouds are water droplets found mostly in the troposphere • The Cryosphere consists of water that is temporarily frozen in polar ice caps, snow, permafrost, and glaciers.

  16. Lithosphere: • All of the land (soil) • Provides the water and minerals needed by plants to produce the food for all trophic levels. • Varies in thickness from 100 – 200 km thick.

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