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First Law of Thermodynamics — Unit test Answers

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21
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Elements with low specific heat values have which characteristic?

A
low atomic mass
B
high thermal energy
C
low kinetic energy
D
low number of atoms per gram
22
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Dante pours hot tea into a mug that is cool to the touch. Which best explains what will happen now?

A
The tea will get warmer because the mug acts as a thermal insulator.
B
The tea will get cooler because it gains energy from the mug.
C
The mug will get warmer because thermal energy transfers from the tea to the mug.
D
The mug will get warmer because the tea creates more thermal energy inside the mug.
23

Which best describes the relationship between heat, internal energy, and thermal energy?

A
Internal energy is heat that flows, and heat is the part of thermal energy that can be transferred.
B
Internal energy is thermal energy that flows, and thermal energy is the part of heat that can be transferred.
C
Thermal energy is heat that flows, and heat is the part of internal energy that can be transferred.
D
Heat is thermal energy that flows, and thermal energy is the part of internal energy that can be transferred.
25

Thermal energy from the Sun travels to Earth by

A
conduction.
B
charged molecules.
C
electromagnetic waves.
D
convection currents.

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