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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
Increases
B
Stays the same
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
Copper expands more than iron
B
Iron gets hotter before copper
C
Copper gets hotter before iron
D
Iron expands more than copper
3) Consider a sample of water at 0C. If the temperature is slightly increased, the volume of water…
A
Expands
B
Contracts
C
Remains the same
4) When water at 4C is heated it expands. When water at 4C is cooled, it
A
Expands
B
Neither
C
Contracts
5) The fact that desert sand is very hot in the day and very cold at night is evidence that sand has a
A
High specific heat capacity
B
Low specific heat capacity
6) a substance can absorb heat energy by the process of…
A
all of these
B
convection
C
conduction
D
radiation
7) Metals are both good heat conductors and also good electrical conductors because of the…
A
Free electrons of outer electrons in metal
B
High densities of metals
C
High elasticity of metals
D
Similarity between thermal and electrical conductive properities
8) A good heat conductor is a…
A
Neither
B
Good insulator
C
Poor insulator
9) Energy transfer by convection is restricted to
A
Fluids
B
Gases
C
Solids
D
Liquids
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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