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Agenda 1/10

Answer warm up question: Give an example of a system. How do you know this is a system? Go over Syllabus and Lab Safety Contract (get Lab Safety Contract signed for HW) Complete notes Complete Biosphere in a Bottle Activity. Agenda 1/10. The Earth and its Systems.

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Agenda 1/10

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  1. Answer warm up question: Give an example of a system. How do you know this is a system? • Go over Syllabus and Lab Safety Contract (get Lab Safety Contract signed for HW) • Complete notes • Complete Biosphere in a Bottle Activity Agenda 1/10

  2. The Earth and its Systems

  3. A system consists of parts that work together. • Parts of the Earth: • Geosphere/lithosphere • Atmosphere • Hydrosphere • Biosphere Why is the Earth classified as a “system”?

  4. All the rocks and soil on Earth’s surface. • Scientists divide the geosphere into • COMPOSITIONAL layers • PHYSICAL layers. What makes up the Geosphere? 1 kilometer= 0.62 mile or 10 football fields.

  5. All the water on or near the Earth’s surface. • Includes • Oceans • Lakes • Rivers • Wetlands • Icecaps • Clouds • Soil • Rock layers beneath surface What is the hydrosphere?

  6. Narrow layer around Earth’s surface in which life can exist. • Layer that gets sunlight for plants, which provide for animals • Also layer that has water, energy and moderate temperatures • Consists of • Uppermost part of geosphere • Most of the hydrosphere • Lower part of the atmosphere. What is the biosphere?

  7. Mixture of gases that surround the Earth. What is the atmosphere?

  8. Helps control temperature of planet. • Without gases in atmosphere it would be too cold to live here. Why is the atmosphere important?

  9. Closed system- energy enters and leaves but matter does not. • EX: Earth- energy from sun enters & reradiates but energy trapped by plants (and eventually animals) does not leave Earth. • Open system- both matter & energy are exchanged by a system. • EX: When Earth was first forming it was open because constantly hit by comets & meteors What is the difference between an open & closed system?

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