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Starter 10-29-13

Starter 10-29-13. The anatomy of grasshoppers is being studied in a dissection lab. Working in groups of three, students make observations using a hand lens, forceps, and a scalpel. Two of the students in a group have finished their observations. These

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Starter 10-29-13

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  1. Starter 10-29-13 The anatomy of grasshoppers is being studied in a dissection lab. Working in groups of three, students make observations using a hand lens, forceps, and a scalpel. Two of the students in a group have finished their observations. These two students may do all of the following except — • A remove their goggles • B review their notes • C wash their hands • D assist their lab partner

  2. Heat Transfer in the Earth

  3. Energy – What is it? Energy from the sun drives weather. Energyis the ability or capacity to do work on some form of matter.

  4. Heat Transfer in the Atmosphere • Heat transfers from high to low temps. • There are three means: • Conduction • Convection • Radiation

  5. Conduction • Conduction occurs when heat is transferred by DIRECT CONTACT • Solids including wet soil are good conductors

  6. Conduction On Earth Seafloor spreading Melting of a plate

  7. Convection • Fluid movement carries heat with it • Heated air is less dense, expands, and rises • Cooler, denser air sinks to replace warm air – completes convective cycle. • Convection: movement of molecules within fluids caused by heating and cooling

  8. Convection on Earth Ocean currents Atmospheric circulation Wind/weather patterns Plate tectonics (convection in the mantle)

  9. Solar Radiation **All matter emits energy as long as its temp. greater than 0K (this is called radiation)** • Radiation from sun is solar radiation • Solar energy travels through space via electromagnetic waves • Ex: greenhouse effect

  10. Greenhouse Effect

  11. “El Niño” • abnormal warming of surface ocean water in the Eastern tropical Pacific • Warmer climate results • Causes more rainy weather and bigger storms to the East (North and South America) and droughts to the West (Australia and Asia)

  12. “La Niña” • abnormal cooling of surface ocean water in the Eastern tropical Pacific • Cooler climate results • Causes more rainy weather and bigger storms to the West (Australia and Asia) and droughts to the East (North and South America)

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