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Thermal Energy 3
Test Description: Continued Review
Instructions: Answer all questions to get your test result.
1) As a piece of metal with a hole in it cools, the diameter of the hole
A
Stays the same
B
Increases
C
Decreases
2) When a bimetallic bar made of copper and iron strips is heated, the bar bends toward the iron strip. The reason for this is…
A
Iron expands more than copper
B
Iron gets hotter before copper
C
Copper gets hotter before iron
D
Copper expands more than iron
3) Consider a sample of water at 0C. If the temperature is slightly increased, the volume of water…
A
Contracts
B
Remains the same
C
Expands
4) When water at 4C is heated it expands. When water at 4C is cooled, it
A
Contracts
B
Expands
C
Neither
5) The fact that desert sand is very hot in the day and very cold at night is evidence that sand has a
A
Low specific heat capacity
B
High specific heat capacity
6) a substance can absorb heat energy by the process of…
A
convection
B
conduction
C
radiation
D
all of these
7) Metals are both good heat conductors and also good electrical conductors because of the…
A
Similarity between thermal and electrical conductive properities
B
High densities of metals
C
Free electrons of outer electrons in metal
D
High elasticity of metals
8) A good heat conductor is a…
A
Poor insulator
B
Neither
C
Good insulator
9) Energy transfer by convection is restricted to
A
Solids
B
Liquids
C
Gases
D
Fluids
10) The higher the temperature of an object, the
A
Shorter the wavelengths it radiates
B
Longer the wavelengths it radiates
*select an answer for all questions
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