Answers NC-Physical ScienceTemperature and Thermal Energy

Temperature and Thermal Energy Answers

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Hot coffee in a mug cools over time and the mug warms up. Which describes the energy in this system?

The average kinetic energy of the particles in the mug decreases.

The average kinetic energy of the particles in the coffee increases.

Thermal energy from the mug is transferred to the coffee.

Thermal energy from the coffee is transferred to the mug.

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What happens when the thermal energy of a substance increases?

The motion of the particles in the substance increases, and the temperature of the substance decreases.

The motion of the particles in the substance decreases, and the temperature of the substance increases.

Both the motion of the particles in the substance and the temperature of the substance decrease.

Both the motion of the particles in the substance and the temperature of the substance increase.

Which best describes thermal energy?

It is the difference between internal energies of two or more substances.

It is the sum of internal energies of two or more substances.

It is the portion of internal energy that can be transferred from one substance to another.

It is the portion of potential energy that can be transferred from one substance to another.

Sayid recorded the temperatures of four substances in a chart.

The particles in substance W have a greater average kinetic energy than the particles in substance Z.

The particles in substance X have a greater average kinetic energy than the particles in substance Z.

The particles in substance W have a lower average kinetic energy than the particles in substance X.

The particles in substance Z have a lower average kinetic energy than the particles in substance Y.

The diagram shows the scales used for recording temperatures. The labels for the scales are missing.

W: FahrenheitX: CelsiusY: Kelvin

W: KelvinX: CelsiusY: Fahrenheit

W: CelsiusX:FahrenheitY: Kelvin

W:CelsiusX: KelvinY: Fahrenheit

Juan measured the temperature of salt water. He then added 273 temperature units to the measured temperature value. Which temperature conversion is Juan most likely doing?

degrees Celsius to degrees Fahrenheit

degrees Celsius to kelvins

kelvins to degrees Celsius

degrees Fahrenheit to degrees Celsius

A thermometer is placed in water in order to measure the water’s temperature. What would cause the liquid in the thermometer to drop?

The molecules in the water spread apart.

The molecules in the thermometer’s liquid spread apart.

The kinetic energy of the water molecules decreases.

The kinetic energy of the thermometer’s liquid molecules increases.

A thermometer is placed in water in order to measure the water’s temperature. What would cause the liquid in the thermometer to rise?

The molecules in the water move closer together.

The molecules in the thermometer’s liquid spread apart.

The kinetic energy of the water molecules decreases.

The kinetic energy of the thermometer’s liquid molecules decreases.

What is the temperature, in degrees Celsius, of a substance with a temperature of 49K?

–322°C

–224°C

224°C

322°C

The diagrams show the movement of particles for two substances.Which best compares the temperatures of the substances?

Substance X has the highest temperature because its particles have more kinetic energy.

Substance X has the highest temperature because it has fewer particles.

Substance Y has the highest temperature because its particles have more kinetic energy.

Substance Y has the highest temperature because it has more particles.

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Temperature and Thermal Energy Answers

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