1. Notes 2: Sources and Forms of Energy
Learning Goal:
Describe different sources of energy
Determine the starting and ending form of energy for various objects

2. FORMS OF OUR ENERGY WE USE ENERGY IN SEVERAL FORMS. WHY ?
EFFICIENCY OF USE
MOST ENERGY MUST BE TRANSFORMED, OR CHANGED, TO BE USEFUL
KINETIC
THE ENERGY OF MOVEMENT
ANY MOVING OBJECT
POTENTIAL
STORED ENERGY
POSITION
CHEMICAL

3. MECHANICAL KINETIC POTENTIAL THE ENERGY OF MOVEMENT ANY MOVING OBJECT
STORED ENERGY
POSITION
CHEMICAL

4. HEAT ( THERMAL ) THE ENERGY OF MOVING ATOMS OR MOLECULES
MEASURED INDIRECTLY
THERMOMETER

5. RADIANT
ENERGY THAT TRAVELS THROUGH SPACE
LIGHT
RADIO TV
X-RAY

6. ELECTRICAL THE MOVEMENT OF ELECTRONS THROUGH WIRE VERY USEFUL
BUT MUST BE CHANGED TO SOME OTHER FORM TO BE USED
VERY EASY TO CHANGE
ONLY USEFUL IF CHANGED INTO A DIFFERENT FORM OF ENERGY

7. CHEMICAL THE ENERGY THAT BONDS MOLECULES TO EACH OTHER FOOD FUELS
PHOTOSYNTHESIS
FUELS
RELEASED WHEN MOLECULAR BONDS ARE BROKEN

8. NUCLEAR LOCKED INSIDE THE NUCLEUS OF ATOMS DIFFICULT TO UTILIZE
BUT VERY POWERFUL
RELEASED IN TWO WAYS
FISSION
SPLIT A BIG ATOM INTO TWO SMALLER ONES
FUSION
JOIN TWO SMALLER ATOMS INTO A LARGER ONE

9. PRIMARY SOURCES OF OUR ENERGY
JUST AS THERE SEVERAL FORMS OR TYPES OF ENERGY
THERE ARE ALSO SEVERAL SOURCES OF ENERGY
IN OTHER WORDS, WHERE DOES OUR ENERGY COME FROM

10. THE SUN PROVIDES ENERGY IN TWO WAYS

11. 1. DIRECTLY FROM THE SUN RADIANT ENERGY WE CALL THIS SOLAR ENERGY
THIS ENERGY IS USED RIGHT AWAY AND IS NOT STORED
SOLAR POWERED CARS
SOLAR HEAT

12. 2. STORED SOLAR ENERGY CHEMICAL MECHANICAL
STORED BY PHOTOSYNTHESIS IN PLANTS
COAL AND PETROLEUM
WHEAT, CORN, ANY TYPE OF VEGETATION
MEAT
MECHANICAL
WIND
WATER BEHIND DAMS

13. OCEAN TIDES MECHANICAL TIDAL MOVEMENT OF THE OCEANS
HARNESSED TO PROVIDE ENERGY
BY GENERATION OF ELECTRICITY

14. EARTH’S HEAT - GEOTHERMAL
INTERNAL HEAT OF THE EARTH
HEAT HOMES
RUN TURBINE GENERATORS TO PRODUCE ELECTRICITY
NOT AVAILABLE EVERYWHERE

15. FISSION FUELS ENERGY FROM THE NUCLEUS URANIUM IS THE USUAL FUEL
SPLIT A BIG ATOM INTO TWO SMALLER ONES
VERY LARGE ENERGY SOURCE

16. FUSION FUELS ENERGY FROM THE NUCLEUS
JOIN TWO SMALLER ATOMS INTO A LARGER ONE
USUALLY HYDROGEN AND LITHIUM ISOTOPES ARE THE FUEL
DEUTERIUM AND TRITIUM
THE ENERGY SOURCE OF THE SUN AND THE STARS
NOT POSSIBLE ON THIS PLANET - YET

17. THEY ARE ALL “A”
EXCEPT
8 = D
9 = C
13 = C
16 = E
17 = E