December 2, 2014
Warm up: What are the six weather tools we have studied? What do they
measure?
Content Objective: The student will be able to define the 3 types of heat transfer
in the atmosphere and after taking notes and viewing video clips.
Literacy Objective: The student will be able to write a description of how a rain
gauge works after a reading.
Radiation Energy direct from the sun. Most heat arrives as infrared radiation.
Standing out in the sunshine you get warmer than you do if you stand in the
shade – that’s radiation.
Conduction Heat transfer from one substance to another that is touching. When
you walk barefoot on the hot sand or road your feet get hot or burn – that is
conduction. Your feet touch the road or sand.
Convection In fluids particles can move easily taking energy along. Convection
happens in fluids (air or liquid). The movement of heat happens because of
density. Watch bubbles or particles in a pot of boiling liquid.
Turn in : XCEL energy sheets filled out using the blue sheet from the kit.
Enter current conditions using the form handed out on 12/1
Sun’s radiation heats land and water. Air gets heated by radiation and conduction.
Air close to the earth is warmer. In the troposphere air is heated by convection.
Air near the surface of the land is heated by conduction (heat transfer from the
land to the air). Particles of air begin to move faster and bump into each other
making them move farther apart so the air becomes less dense. Cooler dense air
sinks to the surface forcing warm air to rise.
Convection currents upward movement of warm air and downward movement
of cool air.
Read pages 570-571. Enter the following in your notebook.
1. How many centimeters of snow equals one centimeter of rain?
2. Draw a rain gauge. Explain how the rain gauge works.
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