Physical Science Chapter 5 Worksheet 4 Name ________________________ Period________________________ Use the words in the table below to complete the concept map insulators conductors radiation electrical forced-air Thermal Energy is transferred by Conduction whose transfer is helped by 3. ____________ and hindered by 4. ____________ 1. ____________ which is used in all the conventional heating systems radiation 2. ____________ in the form of electromagnetic waves and 5. ____________ and 6. ____________ In each of the following statements, a term has been scrambled. Unscramble the term and write it on the line provided ________________ 7. If particles move more llsowy the object’s temperature falls. ________________ 8. Conduction can take place in solids, liquids, and sages. ________________ 9. Thermal energy includes both kinetic and ttnepoail energy ________________ 10. Any material that can flow is lufdi. ________________ 11. Any material that allows heat to pass through it easily is a roconcutd. ________________ 12. Materials with high specific heat can absorb heat without a large hngcae in temperature ________________ 13. Radiation is the transfer of energy in the form of vaews. ________________ 14. When an object increases in temperature it naigs thermal energy. ________________ 15. Many conductors, such as silver and copper, are lemtas. ________________ 16. Energy that travels by radiation is often called darinta greeny. ________________ 17. Insulators, such as wood and air, are poor conductors of thea. ________________ 18. The transfer of thermal energy by convection and conduction both require atterm. Fill in the blanks using the correct terms from the table active stroke combustion conduction heating systems free heat pump passive thermal energy 19. Using solar energy is especially appealing because it is _______________________________. 20. Most ___________________________ use fuel of electricity as a source of energy. 21. A house with large windows on its south side and few windows on its other sides probably uses a(n) ________________________ solar heating system. 22. Solar collectors are used in buildings that have ______________________ solar heating systems. 23. Fuel burned in a stove or fireplace transfers thermal energy to the surrounding air by _____________________, convection, and radiation. 24. Before solar energy can be used as a source of heat, it must be changed to ___________________. 25. ________________________ means rapid burning. 26. A two-way heat mover is a ___________________________________. 27. A _________________________ is the movement of a piston up or down. Write T if the statement is or F if the statement is false ____ 28. Particles that make up matter are in constant motion. ____ 29. The faster particles move the less kinetic energy they have. ____ 30. Temperature is the measure of the average kinetic energy of the particles in an object. ____ 31. When temperature increases, the kinetic energy of the particles decreases. ____ 32. The thermal energy of an object is the total energy of the particles in a material. ____ 33. A 5-kg chunk of aluminum and a 5-kg block of silver that are at the same temperature have the same thermal energy. ____ 34. Heat flows from a higher temperature to a lower temperature. ____ 35. Heat is measured in newtons. ____ 36. Different materials need the same amounts of heat to have similar changes in temperatures. ____ 37. The amount of energy it takes to raise the temperature of 1 kg of a material 1 kelvin is the specific heat of the material. ____ 38. Water has a relatively low specific heat. ____ 39. Materials with a high specific heat can absorb a lot of energy and show little change in temperature. ____ 40. Materials that are poor conductors are poor insulators. ____ 41. The transfer of energy through matter by direct contact of the its particles is convection. ____ 42. The transfer of energy in the form of invisible waves is conduction. ____ 43. Solids usually conduct heat better than liquids and gases. ____ 44. The R-value of insulation indicates the resistance to heat flow. ____ 45. Air is a poor heat conductor. ____ 46. Wind and ocean currents are example of conduction currents. ____ 47. Energy is usually transferred through fluids by radiation. ____ 48. As water is heated, it expands, becomes less dense, and rises. ____ 49. Dark-colored materials absorb less radiant energy that light-colored materials. ____ 50. Only radiant energy that is reflected is changed to thermal energy. ____ 51. The higher the R-value of insulation the less resistant it is to heat flow. Fill in the blanks using the correct terms from the table combustion radiator solar collector conduction insulators radiation solar energy fluid heat engine kinetic energy convection 52. Thermal transfer by convection takes place in materials that are ________________________. 53. A type of heat transfer that does not require matter is __________________________. 54. Energy from the Sun is _________________________. 55. Energy is transferred through matter by direct contact of particles by _______________________. 56. The rapid burning of fuels that takes places in engines is called ____________________. 57. A device with a large surface area designed to heat the air near it by conduction is a(n) ____________________. 58. Materials such as air, wood, and rubber that do not allow heat to pass through them easily are called ____________________________. 59. The transfer of heat energy by movement of matter is called _________________________. 60. A device that absorbs radiant energy from the Sun is a(n) ____________________________. 61. A device that changes thermal energy into mechanical energy is called a(n) ____________________. 62. The particles of an object with a high temperature have a high _________________________. Answer the following questions 63. Using your knowledge of heat, explain what happens when you heat a pan of soup on the stove, and then put some leftover soup in the refrigerator. 64. Why is winter clothing generally darker than summer clothing? Why does wearing two or three layers of clothing help keep you warmer in cold weather than wearing one thick layer? 65. How does a heat mover get heat from cold air? 66. Which has the greater amount of thermal energy, a layer of ice on a pond or a cup of hot water? Explain.