Energy Notes.

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Presentation transcript:

Energy Notes

Energy Potential Energy is… “stored” energy energy of position due to gravity’s pull Kinetic Energy is… energy of motion Potential is converted to Kinetic to cause movement… see next slide

A boulder resting at the top of a slope Potential Energy stored energy EXAMPLES A boulder resting at the top of a slope WATER BEHIND A DAM

Water flowing down-slope in a stream Kinetic Energy energy in motion EXAMPLES Water flowing down-slope in a stream Sediments moving down-slope in erosion Mass movement (slides and slumps)

Energy Transfer ALWAYS from HIGH AMOUNT to LOW! ALWAYS from energy SOURCE (HIGH AMOUNT) to energy SINK (LOW amount) There are 3 ways energy can transfer from energy source to energy sink Conduction Convection Radiation

Example: occurs in _____________ ________________of molecules conduction Solids ONLY occurs in _____________ ________________of molecules collision Example: OUCH!

differences in density convection Demonstration Cool/HIGH Density water Sinks liquids & gases occurs in _____________________ caused by ____________________ differences in density WARM/LOW Density Water Rises

convection examples:

energy travels in_____________ radiation waves energy travels in_____________ Examples:

Radiation Can travel through solids Can travel though liquids and gases too! Radiation is the only method that can travel through SPACE (which is nothing)

ALL RADIATION travels the Same way but there are Different types! Type is determined by wavelength Are more powerful than Short waves LONG waves

ESRT p 14! SHORT WAVE RADIATION LONG WAVE RADIATION SHORT wave Light

The SUN gives off most forms Of radiation… Incoming SOLar radiATION In-Sol-Ation MOSTLY VISIBLE LIGHT Some Infrared (long wave) A little Ultraviolet (short wave)

Energy REVIEW By what method is energy transferred directly from a heat source to a heat sink? By what method is energy transferred from warm air to cool air? By what method is energy transferred from the Sun to Earth? What is the major type of EM Radiation that Earth received from the sun? What color is the shortest wave visible light?