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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.