Chapter 5 Lesson 2 Forms of Energy

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Presentation transcript:

Chapter 5 Lesson 2 Forms of Energy How can you find an object’s mechanical energy? What are other forms of energy?

Forms of Energy Full of Energy The graph shows the fuel sources used to generate electricity in the state. Estimate the percentage of coal used in Indiana to generate electricity? _____________________________ 2) How do you think this graph might change in 10 years? ______________________________________________________________________________________________________________________________________________________________________________

Mechanical Energy The energy of motion that does the work Combination of Kinetic AND Potential energy Objects have mechanical energy if they can do work More mechanical energy = More work Example: When a spring is coiled up or a rubber band is stretched, mechanical energy is stored in it. When the spring uncoils or the rubber band snaps back, this energy is released

Mechanical Energy http://studyjams.scholastic.com/studyjams/jams/science/matter/energy-and-matter.htm

If an object has 50 joules of kinetic energy and 237 joules of potential energy, what is its mechanical energy?

Describe with examples that energy exists in several different forms What are other forms of energy? Describe with examples that energy exists in several different forms

What Are Other Forms of Energy? 7 Forms of energy to know Mechanical – motion of object Sound - vibrations Nuclear – fusion and fission Thermal – temperature of object Electrical – batteries or power lines Electromagnetic – visible light, microwaves Chemical – food, cells in your body, matches

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2 Nuclear Energy

Nuclear Energy Use the Venn diagram to compare and contrast nuclear fission and nuclear fusion.

3 Thermal Energy

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5 Electrical Energy

Electromagnetic Energy 6 Electromagnetic Energy

Forms of Energy Many objects in this restaurant have more than one form of energy. Find three objects. http://www.pearsonsuccessnet.com/snpapp/learn/navigateIDP.do?method=vlo&internalId=140611115000077&isHtml5Sco=false#