CDA 3 Energy in our life Study Guide 1.Sunlight is what type of energy transfer? Radiation Heat transfer between your hand and a piece of ice is? 2. Heat transfer between your hand and a piece of ice is? Conduction If 2 North poles of a magnet are pushed together what happens? 3. If 2 North poles of a magnet are pushed together what happens? They push away or Repel each other.

4. A wire carrying current exerts a what? Electromagnetic field 5. A nail, piece of wire, and a battery can make what? An electromagnet 6. If light bulbs are wired in parallel what happens when one bulb burns out? 6. If light bulbs are wired in parallel what happens when one bulb burns out? The others remain lit 7. If light bulbs are wired in series what happens if one bulb is removed? 7. If light bulbs are wired in series what happens if one bulb is removed? All bulbs go out

8. Parallel circuits have more than one what? Paths for current to flow 9. If you can choose how many devices in a circuit are on or off, what type of circuit is it? Parallel 10. If switch A is turned off for bulb A and another path exists for bulb B will bulb B light up? Yes and A will be off 11.Heat transfer by touching is what type? 11.Heat transfer by touching is what type? Conduction

12. Thermal energy always moves in what direction? Warmer to cooler 13. Energy transferred through the vacuum of outer space is what type? Radiation 14. Does warm air rise or fall? Warm air rises 15. A Warm solid cooling off in liquid is what energy transfer? 15. A Warm solid cooling off in liquid is what energy transfer? Conduction

16.When a battery wears out or drains, what happened to all the energy? Its converted to other energy forms 17. A bicycle and a car are examples of mechanical energy, what fuels would be their chemical energy Food and gasoline or diesel fuel 18.Plants transform EM energy from the sun and convert it into what type of energy? Chemical

19.Playing the drums shows what energy conversion? Mechanical to sound 20. A flashlight shining demonstrates what energy types? 20. A flashlight shining demonstrates what energy types? Light, chemical and heat 21. A reading lamp is what energy transformation? Electrical to EM(electromagnetic) light

22. A hand generator lighting a light bulb is what series of energy transformations.? Mechanical to electrical to electromagnetic 23. Gasoline in a car or truck demonstrates what energy transformation? Chemical to mechanical energy 24. A falling object has KE and PE, which is increasing and which is decreasing? KE increases and PE decreases

25.Potential energy is lowest and kinetic is highest at what point of a rollercoaster? Bottom of first hill 26. A bouncing ball stops because of a loss of what two energy types? 26. A bouncing ball stops because of a loss of what two energy types? Sound and heat energy 27. The total of PE and KE stays the same is aka what? Law of conservation of energy 28. In every energy transformation what is true? Energy is conserved 29. Engines put out usable energy and what ? Unusable energy like friction or heat