Types of Energy!
What is energy? Energy is the ability to cause change (or to do work)
Kinetic Energy Kinetic Energy is the energy an object has because of its motion. Depends on the object’s speed and its mass.
Potential Energy Potential Energy is the energy stored in an object because of its position/height. Depends on its height/position and its mass.
Roller Coasters!! At the top of the first and tallest hill, the car has the greatest potential energy. This potential energy is transformed into kinetic energy as it races down the hill.
Thermal Energy All objects have thermal energy (heat), which, increases as the temperature increases. Which has more thermal energy…a block of ice or a cup of water?
Radiant Energy The energy carried by light is called radiant energy. When radiant energy is absorbed it can become thermal energy (like a black jacket on a hot day) Name 3 objects that have radiant energy….
Electrical Energy Electrical energy is the energy carried by electric current (created by electrons moving from atom to atom in a flow). Power plants generate electrical energy. How do these power plants generate electricity?
Chemical Energy Chemical energy is the energy stored in chemical bonds. Examples: –Food (ex. photosynthesis) –Fuels (ex. natural gas, oil, coal)
Nuclear Energy Nuclear energy (also called atomic energy) is the energy within the nuclei of atoms. Nuclear energy is released by the splitting (fission) or merging together (fusion) of the nuclei of atom(s). It is nuclear fission that we use as a power source to give us nuclear power.
Playing Basketball… When dribbling a basketball, what types of energy does the ball have and how do they change throughout the movement?
Classwork / Homework Answers Workbook – C13, S1 “Before you read” – answers will vary Highlight / UnderlineText – check for completion 1. – A slower moving object has less kinetic energy; an object with less mass has less kinetic energy also 2. – The top vase will have more potential energy; potential energy is affected by position (height) and mass 3. – greatest thermal energy = hot coco - least thermal energy = ice
Classwork / Homework Answers Workbook – C13, S1 4. – Food has stored chemical energy that our bodies use. 4. continued… Food’s chemical energy comes from the food chain which is started through photosynthesis where radiant energy from the sun is transformed into chemical energy for fuel. 5. When an object absorbs light energy, the object gets warmer (like a black shirt on a hot day in the sun) 6. – 220V electrical outlet
Classwork / Homework Answers Workbook – C13, S1 1. – Potential energy is stored energy relating to its position and depends upon its height and mass. Kinetic energy is the energy of motion and depends upon the object’s speed and mass. 2 – potential energy = book on a shelf Kinetic energy = a ball rolling Electrical energy = the energy that makes a TV work Thermal energy = the energy in a hot cup of tea Chemical energy = the energy in food Nuclear energy = the energy in an atom’s nucleus Radiant energy = a lamp giving off light
Classwork / Homework Answers Worksheets – C13, energy (pg. 17) 1. power plants 2. solar/light 3. food and fuel 4. nuclear 5. magma 6. light/solar 7. position
Classwork / Homework Answers Worksheets – C13, energy (pg. 25) 1. Energy is the ability to cause change 2. It has energy if it is causing change or can cause change 3. kinetic and potential 4. radiant and thermal 5. electrical (and chemical) 6. chemical 7. potential 8. chemical 9. radiant
Classwork / Homework Answers Worksheets – C13, energy (pg. 25) 10. nuclear 11. thermal 12. kinetic 13. kinetic 14. transferring 15. greater 16. less 17. potential energy 18. more 19. more
Classwork / Homework Answers Textbook – Chapter Review – C13, energy (pg. 400) 10. C - potential 11. D - radiant 12. D – chemical to kinetic (food to motion) 14. A - chemical 20. answers will vary 21. answers will vary
Classwork / Homework Answers Textbook – Chapter Review – C13, energy (pg. 402) 2. B D C – 7.6 (38.2 * 20% = 7.6) 8. B – potential to kinetic