Heat and Temperature

What is thermal expansion?

• Thermal expansion is the increase in volume of a substance due to an increase in temperature.

• Thermal expansion is the decrease in volume of a substance due to a decrease in temperature.

• Thermal expansion is the change in color of a substance when heated.

• Thermal expansion is the process of a substance becoming solid when heated.

What is specific heat capacity?

• The amount of heat required to raise the temperature of 1 kg of a substance by 1 degree Celsius.

• The total heat energy contained in a substance.

• The heat required to change a substance from solid to liquid at its melting point.

• The heat required to increase the temperature of a substance without changing its state.

What happens to molecules when heat is added?

• The molecules move slower and contract.

• The molecules move faster and may expand.

• The molecules remain unchanged.

• The molecules dissolve in the heat.

What is freezing?

• Freezing is the process where a liquid turns into a solid when heat is removed.

• Freezing is the process where a solid turns into a liquid when heat is added.

• Freezing is the process of cooling a gas to form a liquid.

• Freezing is the process of evaporating a liquid into vapor.

How can thermal energy be increased in a substance?

• By raising the temperature of the substance.

• By decreasing the pressure on the substance.

• By adding more mass to the substance.

• By cooling the substance down.

What is the boiling point of water?

• 90 degrees Celsius (194 degrees Fahrenheit)

• 100 degrees Celsius (212 degrees Fahrenheit)

• 110 degrees Celsius (230 degrees Fahrenheit)

• 80 degrees Celsius (176 degrees Fahrenheit)

What is a thermometer?

• A device used to measure temperature.

• A tool for measuring humidity.

• An instrument for measuring pressure.

• A gadget for measuring speed.

What is thermal energy?

• Thermal energy is the total energy of all the particles in a substance.

• Thermal energy is the energy stored in the bonds of chemical compounds.

• Thermal energy is the energy associated with the motion of an object's center of mass.

• Thermal energy is the energy released during a nuclear reaction.

What is temperature?

• Temperature is a measure of the average kinetic energy of the particles in a substance.

• Temperature is the total amount of heat in a substance.

• Temperature is the measure of how hot or cold an object is based on its color.

• Temperature is the measure of the pressure exerted by particles in a substance.

What is the effect of removing heat from water?

• It causes the water to evaporate into steam.

• It causes the water to freeze into ice.

• It increases the temperature of the water.

• It turns the water into vapor.