Review for Week 18 DCA:

  1. What is biomass? ______

______

  1. What is energy? ______
  2. What is potential energy? ______
  3. What is kinetic energy? ______

5. EXAMPLES OF ENERGY TRANSFORMATIONS

STARTING ENERGY TRANSFORMED INTO EXAMPLE Potential To Kinetic YES/NO

CHEMICAL / CHARCOAL BURNING
MECHANICAL / MIXING BOWL
ELECTRICAL / SOUND
ELECTRICAL / TOASTER OVEN
HEAT (THERMAL) / LIGHTING A MATCH
ELECTRICAL / WINDMILL
ELECTRICAL / HAIR DRYER
HEAT (THERMAL) / LIGHT BULB
  1. What does the law of conservation of energy state? ______

______

  1. In the hydroelectric power plant lab where we built a turbine, what kind of energy transformation is occurring? ______
  2. Do fossil fuels such as oil or coal cause pollution? ______
  3. What would be a “cleaner” form of energy? ______
  4. Name some forms of energy that are nonrenewable: ______

______

  1. Name some forms of energy that are renewable: ______

______

  1. What is a circuit? ______

How does it convert energy? ______

  1. Energy appears in two forms. What are they? ______
  2. Read the descriptions below and identify each as potential or kinetic:
  3. The energy that exists before baking soda and vinegar combine to create carbon dioxide gas. ______
  4. A child on his way down a playground slide. ______
  5. Exploding fireworks. ______
  6. Ocean Waves. ______
  7. A stunt driver at the top of a ramp. ______
  8. The flexed string of an archer’s bow. ______
  9. Boiling water. ______
  10. A glowing neon sign. ______
  11. The sun. ______
  12. The bond between hydrogen and oxygen that creates water. ______
  1. Which one is an example of kinetic energy?
  2. A battery
  3. a rollercoaster at the top of a hill
  4. a bike rider in a race
  5. a stretched rubber band
  6. Which one is an example of potential energy?
  7. the wind
  8. a battery
  9. a child sliding down a slide
  10. boiling water
  11. Where do you have the most potential energy?
  12. at the bottom of a hill
  13. on the 2nd turn of the rollercoaster
  14. at the very top of a hill
  15. just before you finish a ride
  16. If you are bouncing a ball, at what point do you have the greatest kinetic energy?
  17. right before it hits the ground
  18. when it is in your hand
  19. right after it leaves your hand
  20. when it hits someone else’s hand.
  21. When a battery is running low, it has decreasing potential energy.
  22. True
  23. False
  24. Lighting a match is an example of:
  25. thermal energy transformed to electrical energy
  26. chemical energy transformed to thermal energy
  27. electrical energy transformed to mechanical energy
  28. mechanical energy transformed to electrical energy
  29. What is a force? ______
  30. What is the force that pulls objects towards each other? ______
  31. What is a balanced force? ______
  32. What is an unbalanced force? ______
  33. When one object is pushing or pulling another object, the first object is ______a force on the second object.
  34. Unbalanced forces can cause an object to do three things: 1. ______, 2.______, 3. ______
  35. What is the result of the combination (draw arrows to represent which way they would go).

 +  = ______

+  on wheels = ______