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Science Log

Science Log. What exactly does it mean when you say things like, “Whew, I don’t have any energy today.” What are some types of energy that you can think of?. Objectives. List the types of Energy. Predict how energy will change. What is energy?. Energy is the ability to do work.

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Science Log

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  1. Science Log What exactly does it mean when you say things like, “Whew, I don’t have any energy today.” What are some types of energy that you can think of?

  2. Objectives List the types of Energy. Predict how energy will change.

  3. What is energy? Energy is the ability to do work. Energy causes countless actions and reactions to occur every day.

  4. Types of Energy We will focus on eight types of energy.

  5. Kinetic Energy Energy in use or motion. Energy due to movement.

  6. Potential Energy Stored energy. Energy due to how high it is off the ground and how much gravity could pull on it.

  7. Heat Energy A measure of how much atoms are moving.

  8. Light Energy Causes things to be luminous (lit up).

  9. Sound Energy Sound is produced by a vibrating object. Waves of molecules hitting each other (like dominos)

  10. Electrical Energy Electrons flow in a current.

  11. Chemical Energy Energy stored in a molecule that can be released with a chemical reaction.

  12. Elastic Energy Stored energy when something is stretched or deformed.

  13. Do you get it? What type of energy is it? • A woman is jogging. • You listen to a piano. • You put on sunglasses because the sun is bright. • A boulder sits precariously on the edge of a cliff. • You are ready to shoot a sling shot. • Your hands are hot after you rub them together. • You get zapped by static. • You eat a Snickers.

  14. What is Thermodynamics? Thermodynamics is the study of how energy changes from one form to another.

  15. 1st Law of Thermodynamics Energy can change forms but can neither be created nor destroyed. Therefore, there are always equal amounts of energy going into and out of a system. Sometimes called conservation of energy. Ex: motor, human body, slap hand on table

  16. 2nd Law of Thermodynamics Energy always flows from a high concentration to a low concentrations. Or, heat always flows from hot to cold. Also, energy becomes more random and useless as time goes on. (Entropy) Energy eventually changes into useless heat.

  17. More heat is flowing out of this man's body than his metabolism can generate. He is cold. More heat is flowing out of this man's body than his metabolism can generate. He is cold.

  18. More heat is flowing into this More heat is flowing into this man's body than is flowing out. He is hot.

  19. Do you get that? • If 100 units of energy go into an engine, predict how many units should come out. • If that engine is run on chemical energy (gas), what forms of energy do you predict it will change into? • When you eat food, what form did the energy start in and what forms did it end up as?

  20. Try it yourself. At home, first identify 3 types of energy and record it. Next observe energy changing forms at least once. What type of energy did it start out as and what types did it end up as? This paper is due tomorrow.

  21. Objectives List the types of Energy. Predict how energy will change.

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