Temperature and Thermal Energy

When holding an ice cube, what causes the ice to melt?

• Thermal energy from the ice is transferred to the air.

• Thermal energy from the hand is transferred to the ice.

• The hand absorbs thermal energy from the ice.

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

• Thermal energy from the coffee is transferred to the mug.

• Thermal energy from the mug is transferred to the coffee.

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

What happens when the thermal energy of a substance increases?

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

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

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

Which best describes thermal energy?

• 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.

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

Which type of energy refers to the sum of potential and kinetic energies in the particles of a substance?

• motion

• heat

• internal

Which shows the potential energy of particles in three substances, from least to greatest?

• liquid, gas, solid

• solid, liquid, gas

• gas, liquid, solid

To convert 78 degrees Fahrenheit to Celsius; First subtract 32 from 78. What next?

• Multiply 46 by 5/9

• Add 273 to 46

• Multiply 46 by 9/5

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

• -322 degrees Celsius

• -224 degrees Celsius

• 224 degrees Celsius

Which is equal to a temperature of 50 degrees Fahrenheit?

• 10 degrees Celsius

• 18 degrees Celsius

• 32 degrees Celsius

When measuring the temperature of salt water, if you added 273 to the measured value, what are you doing?

• Converting degrees Celsius to Fahrenheit

• Converting Fahrenheit to degrees Celsius

• Converting degrees Celsius to Kelvins