Name: ______Period: ______

3 week review

  1. What does the law of conservation of energy state? Energy is never created or destroyed it only changes
  1. Write all types of energy:sound, chemical, light, nuclear, electrical, thermal, and mechanical
  1. What kind of energy does a moving object have?mechanical
  1. What kind of energy is stored inside a battery?chemical
  1. What energy transformation(s) take(s) place when you strike and light a match?

Chemical to radiant

  1. PHOTOSYNTHESIS transforms radiant energy from the Sun into what type of energy?chemical
  1. What happens to the liquid in thermometers when it is heated?The liquid expands
  1. Which of the pictures below illustrates the transformation of electrical to thermal energy? D

Match the energy system with the energy transformation that is occurring

9.A toaster ___L__ / a.Chemical Energy to Thermal Energy and Radiant Energy
10. Person Running ____H__ / b.Radiant Energy to Chemical Energy
11.Candle Burning ____A___ / c.Chemical Energy to Mechanical Energy, Thermal Energy
12.Playing a Violin __I___ / d.Radiant Energy to Electrical Energy
13.Turning on a flashlight __F___ / e.Electrical Energy to Thermal Energy
14.Windmill Turning ___K___ / f.Chemical Energy to Radiant Energy
15.Tanning Bed ____J___ / g.Nuclear Energy to Electrical Energy
16.Nuclear Power Plant ____G____ / h.Chemical Energy to Mechanical Energy
17.Tree Growing Fruit _____B___ / i.Mechanical Energy to Sound Energy
18.Iron(used for clothing) ___E____ / j.Electrical Energy to Radiant Energy
19.Digesting an Apple ___C___ / k.Mechanical Energy to Electrical Energy
20.Solar Calculator ____D___ / l.Electrical Energy to Thermal Energy and Radiant Energy

21. Define conduction:Transfer of thermal energy by direct contact

22. Define convection:transfer of thermal energy in liquids and gases.

23. Define radiation:transfer of thermal energy by electromagnetic rays

  1. Hot coffee is stirred with a spoon; the spoon gets hot due to conduction.
  1. A chair is placed several feet from a fire in a fireplace. The side of the chair facing the fireplace gets warm because ofradiation.
  1. A certain type of decorative lamp contains colored liquids. These liquids form globs that break off and rise to the top of the liquid. The globs rise due to convection.
  1. Near the ceiling of a room the air is warmer. The warm air rises because of convection.
  1. A college student holds the back of his hand near an iron to see if it is hot. Heat is transferred to his hand by radiation.
  1. A heater is placed under one corner of a water bed mattress. Warm water moves throughout the mattress because of convection.
  1. A certain type of stainless steel cookware has a layer of copper applied to the bottom to help it heat evenly. The copper transfers heat to the pan by conduction.
  1. In a swimming pool, the water near the surface is slightly warmer. The warm water rises because of convection.
  1. One end of a copper rod is placed in a flame of a Bunsen burner. Small pieces of wax placed along the rod melt at progressively larger distance from the flame. Heat is transferred through the rod by conduction.
  1. A house burns down. On the house next door, all of the vinyl siding is twisted and warped by the heat. The heat was transferred to the house next door by radiation.