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Name
Date
Class
■
Temperature and Heat
■
Transferring Thermal Energy
Directions: In each of the following statements, a term has been scrambled. Unscramble the term and write it
on the line provided.
1. If particles move more llsowy the object’s temperature falls.
2. Conduction can take place in solids, liquids, and sages.
3. Thermal energy includes both kinetic and ttnepoail energy.
4. Any material that can flow is lufdi.
5. Any material that allows heat to pass through it easily is a
roconcutd.
6. Materials with a high specific heat can absorb heat
without a large hngcae in temperature.
7. Radiation is the transfer of energy in the form of vaews.
8. When an object increases in temperature it naigs thermal
energy.
9. Many conductors, such as silver and copper, are lemtas.
10. Energy that travels by radiation is often called darinta
greeny.
11. Insulators, such as wood and air, are poor conductors of
thea.
12. The transfer of thermal energy by convection and
conduction both require atterm.
Directions: On the lines provided, explain the differences between conduction, convection, and radiation.
Use the information in the exercise above to help you. Write your answers in complete sentences.
13.
Name
Date
Class
Thermal Energy
Directions: In each of the following statements, a term has been scrambled. Unscramble the term and write it
on the line provided.
14.The transfer of energy through matter by direct contact
of particles is called docniotucn.
15.The transfer of energy by the movement of matter is
called vecconniot.
16.The type of heat transfer that does not require matter is
iadraniot.
17.Any material that does not allow heat to pass through it
easily is an roinsulta.
18.An ntieanrl busmcotoin engine burns fuels inside
chambers called cylinders.
19Energy from the sun is lraos neeygr.
20.A device on a building that absorbs radiant energy from
the sun is lraos lleocctro.
21.The thermal energy that flows from something with a
higher temperature to something with a lower temperature
is called eath.
22.Thermal energy is converted into mechanical energy by a
thea gennie.
23. A thea revmo moves thermal energy from one location and
transfers it to another location at a different temperature.
24. The pertreuamet measures the average kinetic energy of
all the particles in an object.
25. The total energy of the particles in a material is ethrlam
gyeren.
26. The pcciifes thea of a material is the amount of energy it takes
to raise the temperature of 1 kg of the material 1 kelvin.
Name
Date
Class
Transferring Thermal Energy
Directions: Determine whether the italicized term makes each statement true or false. If the statement is true,
write true in the blank. If the statement is false, write in the blank the term that makes the statement true.
27. Materials that are poor conductors are poor insulators.
28. The transfer of energy through matter by direct contact of its particles
is convection.
29. The transfer of energy in the form of invisible waves is conduction.
30. Solids usually conduct heat better than liquids and gases.
31. The R-value of insulation indicates its resistance to heat flow.
32. Air is a poor heat conductor.
33. Wind and ocean currents are examples of conduction currents.
34. Energy is usually transferred in fluids by radiation.
35. As water is heated, it expands, becomes less dense, and rises.
36. Dark-colored materials absorb less radiant energy than light-colored
materials.
37. Only radiant energy that is reflected is changed to thermal energy.
38. The higher the R-value of insulation the less resistant it is to heat flow.
Directions: Circle the object in each pair that will take in more heat. In the blank, explain why that object will
take in more heat.
39. a silver spoon
a wooden log
40. a white shirt
a red shirt
41. foil in the sunlight
a sidewalk in the sunlight
42. single-pane window
double-pane window
43. R-5 insulation
R-35 insulation
Name
Date
Class
Directions: Use the figure below to answer questions 1–5. In the blank at the left, write the letter of the term or
phrase that completes each statement or answers the question.
44.How will the heat from the pot in room A move to its handle?
a. convection
b. radiation
c. conduction
d. both a and b
45.Thermal energy is transferred to the sunbather in room B by ______.
a. convection
b. radiation
c. conduction
d. both a and b
46.Where does most of the heat provided by the fire in room C go?
a. up the chimney b. into the room
c. to the people
d. none of these
47.In room C, thermal energy is transferred to the people by ______.
a. convection
b. conduction
c. radiation
d. both a and c
48.In room D, the thermal energy of the iron is transferred to the clothes by ______.
a. convection
b. conduction
c. radiation
d. none of these
Directions: Answer the following questions using complete sentences.
49.Water has a very high specific heat. Why does this make it a very good substance for use in
cooling systems of automobiles?
50.A well-insulated house should have insulation with an R-value of at least R-19 in the walls
and an R-value of R-30 to R-44 in the ceilings. Why is a higher R-value needed in the ceilings?
51.Why do the pipes in a steam-heating system need to be insulated?