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Energy What are some ways we use or see energy being used?

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Presentation on theme: "Energy What are some ways we use or see energy being used?"— Presentation transcript:

1 Energy What are some ways we use or see energy being used?

2 Some forms and uses of energy

3 What is energy? Energy is the ability to do work or cause change. What types of energy do you see in this photo? Nuclear energy (sun) Chemical energy (plants) Thermal energy (melting snow) Mechanical energy (moving water) Light energy (visible light)

4 Everything we do is connected to energy use.

5 Energy is usually described as kinetic or potential

6 Different forms of Energy Kinetic Energy- the energy an object has due to its motion.

7 Kinetic energy increases when you have more mass. The green ball has more kinetic energy because it has more mass. So it makes a bigger splash! Which ball will make a bigger splash?

8 Kinetic energy increases when you have more speed Will the ball go farther with a slow swing or a fast swing? Why? A fast swing has more speed, therefore, more kinetic energy and the ball will go farther.

9 Potential Energy- the energy an object has stored, often due to its position.

10 Which skier has more potential energy? Why? Skier 1 has more potential energy because they are at a higher position than skier 2. http://www.youtube.com/watch?v=vl4g7T5gw1M

11 Roller Coasters use potential and kinetic energy to create an exciting ride http://www.youtube.com/watch?v=0H5_jrwSA3w

12 Try it! Create a roller coaster with just the right balance of potential and kinetic energy so it doesn’t crash! http://www.brainpop.com/games/coastercreator/

13 Is it Kinetic or Potential?

14 Classify the following as a type of potential energy or kinetic energy (use the letters K or P) 1.A bicyclist pedaling up a hill 2.An archer with his bow drawn 3.A volleyball player spiking a ball 4.A baseball thrown to second base 5.The chemical bonds in sugar 6.The wind blowing through your hair 7.Walking down the street 8.Sitting in the top of a tree 9.A bowling ball rolling down the alley 10.A bowling ball sitting on the rack What can you find in your home that are examples of kinetic and potential energy? Name two for each type of energy.

15 Kinetic Energy Lab You will be testing the factors that affect kinetic energy by recording the distance a marble will roll down a ramp. – You will change its mass and its speed (angle of the ramp) and describe how this affects its energy.

16 Kinetic Energy The faster an object moves, the more kinetic energy it has. The greater the mass of a moving object, the more kinetic energy it has. Kinetic energy depends on both mass and velocity.

17 Potential Energy “The bigger they are the harder they fall” is not just a saying. It’s true. Objects with more mass have greater P.E. The formula to find P.E. is P.E. = Weight X Height.

18 http://vitalnj.pbslearningmedia.org/asset/mck 05_int_rollercoaster/ http://vitalnj.pbslearningmedia.org/asset/mck 05_int_rollercoaster/

19 Energy forms and transformations http://phet.colorado.edu/en/simulation/energ y-forms-and-changes http://www.pbslearningmedia.org/resource/h ew06.sci.phys.maf.trebuchet/energy-transfer- in-a-trebuchet/ Trebuchet potential into kinetic energy

20

21 How does the bulb light up? What forms of energy are seen? The bulb gets its energy from the battery. There is chemical energy in the battery Electrical energy in the wires Thermal energy in the bulb filament Light energy and thermal energy seen from the bulb. Energy changes form to light the bulb.

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