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Forms of Energy & Transformations Energy makes things happen!! Energy is neither created nor destroyed, it is constant.

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Presentation on theme: "Forms of Energy & Transformations Energy makes things happen!! Energy is neither created nor destroyed, it is constant."— Presentation transcript:

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2 Forms of Energy & Transformations Energy makes things happen!! Energy is neither created nor destroyed, it is constant.

3 I. NUCLEAR ENERGY A. Fission  Split apart  Radioactive uranium atoms can break apart – fission.  If fission happens in a billionth of a second you get an ATOMIC BOMB. B. Fusion  Joining together  Deuterium+Lithium= * (heat + light)  so D + L = energy  SUN  Scientists can’t control this yet; it’s hard to build a star! *

4 II. KINETIC ENERGY: MOTION A. Translational: Motion from Point A to Point B Examples: toy car or rolling ball... B. Rotational: Spin Examples: toy top C. Tortional: Twist Examples: twisted playground swing, anything that twists D. Vibrational: Shake (short movements) Examples: Rattleback, Slinky

5 III. POTENTIAL ENERGY: STORED (waiting to happen) Outline A. Gravitational  HYDROPOWER, WALKING DUCK  WATER CYCLE/ALPINE ECOSYSTEM B. Chemical  EXPLODING CANNISTER/ALCOHOL BURNER, BATTERY C. Elastic SPRINGS RUBBER BANDS

6 III. POTENTIAL: A. Gravitational: Hydropower Pull of gravity makes things move downhill. Reservoir: water runs downhill to turn the turbine to turn the generator to make electricity. PE=mgh

7 III. POTENTIAL: A. Gravitational: Water Cycle Water cycle:  precipitation-rain  evaporation-sun  condensation-cloud  precipitation-rain

8 III. POTENTIAL: B. Chemical: Natural Resources Harnessing fossil fuels and natural resources: Oil Coal Natural Gas Wood Food

9 III. POTENTIAL: C. Elastic: Spring/Stretch Rubber  Plastic poppers  Super balls, Air-zooka  Rubber bands  Screaming Balloons Springs  Slinky

10 IV. LIGHT ENERGY (Electromagnetic Energy) A. Lightning (Tesla Coil) 1. Air inside the cloud rubs, makes static electricity.. Negative charges settle in cloud. Negative charges move to positive > lightning. B. Light Sticks C. Laser – very focused ray of light Surgery; Pointers D. Solar cells

11 V. SOUND ENERGY A. THUNDER  When lightning strikes, it heats and forces air molecules outward. B.SONIC BOOM C. EXAMPLES: Cracker Blaster, Solar Tunes, Thunder Drum

12 VI. HEAT ENERGY: A. The Heat Tax Heat comes from every energy conversion !!!  Nothing is for nothing!  Always pay “heat taxes.” EXAMPLES: Solar thermal Wind energy Friction = motion + heat Thermoelelectric Converter Heat Engines Radiometer

13 VI. HEAT ENERGY: B. Geothermal “Earth” + “heat” Dig a hole: Temp. Increases as you go. Water gets in the cracks of the earth; turns to steam: - steam heat - geysers (Old Faithful) - Geysers Plant in CA

14 Examples of HEAT ENERGY: C. Solar Thermal The sun’s heat: Car on cold day Wind Energy: 1. Sun heats the air unevenly. 2. Warm air rises, makes wind.Wind has translational KE.

15 Do you know the energy transformations in FIREWORKS?

16 FIREWORKS Answer Going up: Chemical > Trans. KE > Grav. PE > Trans. KE + heat Exploding: Chemical > Light + Sound + Heat

17 This concludes our energy notes.


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