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# 7th Grade Chapter 5 Lesson 4

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For Student Use Only

For Student Use Only

Published in: Education, Technology
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### Transcript

• 1. 7 th Grade Chapter 5 Lesson 4 Pgs. 178-183 For Student Use Only
• 2. The Motion of Air
• Wind- movement of air from one place to another in a horizontal motion.
• Updraft, Current, and Downdraft- wind moving vertically
• Wind- has kinetic energy
• 3. Energy
• Sun- source of all heating
• Radiant Energy is converted into kinetic energy (to heat)
• Earth and Water release heat energy
• 4. Energy
• Temperature Factor
• Winds= a direct result of the temperature differences that exist across the surface of the Earth
• Different surfaces heat differently
• Some surfaces reflect light and some absorb light
• Remember darker surfaces absorb more than lighter surfaces
• Different areas of the Earth heat differently
• The angle of the sun is more direct at different areas
• 5. Heat Energy
• Albedo- the percentage of radiation that is reflected
• Color is determined by the amount of light that is reflected
• Black absorbs colors
• White reflects all colors
• Dark heats up more quickly than light
• 6. Heat Energy
• Three differences between land and water
• 1. Water is somewhat transparent but land is not
• 2. Land is a solid but water is a liquid
• 3. Water has a much greater heat capacity than land
• 7. Difference between soil and water
• 1. Water is somewhat transparent but land is not
• Radiant energy heats water differently from soil
• Movie Notes:
• A Look at How Land Heats up
• 8. Difference between soil and water
• 2. Land is a solid but water is a liquid
• Molecules of solid do not move, but liquids do move and heat up quickly
• Liquids create convection currents (warm fluids rise and cool fluids sink)
• Movie Notes:
• Surface Wind and Convection Currents
• 9. Difference between soil and water
• 3. Water has a much greater heat capacity than land
• - Heat Capacity- a substance is the amount of energy needed to raise its temperature by one degree
• Movie Notes:
• Heat Capacity
• 10. Heat Capacity
• These differences make different objects heat up differently
• It is important that water heat up slowly
• Our bodies are water
• Our Earth is water