Topic 6 (Temperature & Heat)

What is temperature?

• The amount of heat energy in an object

• The degree of hotness or coldness of an object

• The amount of light reflected by an object

• The degree of brightness of an object

Which of the following temperature scales is based on the freezing and boiling points of water?

• Kelvin scale

• Celsius scale

• Fahrenheit scale

• Rankine scale

Which of the following statements is true about heat?

• It is a form of energy

• It is a form of matter

• It is a type of light

• It is a type of sound

What is the process by which heat is transferred from one object to another through direct contact?

• Convection

• Radiation

• Conduction

• Insulation

Which of the following statements is true about specific heat capacity?

• It is the amount of heat energy required to raise the temperature of a substance by one degree

• It is the amount of heat energy required to melt a substance

• It is the amount of heat energy required to vaporize a substance

• It is the amount of heat energy required to freeze a substance

What is thermal equilibrium?

• The state in which two objects have the same temperature and no heat flows between them

• The state in which two objects have different temperatures and heat flows from the hotter object to the cooler object

• The state in which two objects have the same temperature and heat flows from the cooler object to the hotter object

• The state in which two objects have different temperatures and no heat flows between them

Which of the following is a necessary condition for thermal equilibrium to be established between two objects?

• The two objects must be in physical contact with each other

• The two objects must be made of the same material

• The two objects must be the same size

• The two objects must be at the same height

Which of the following is an example of a system in thermal equilibrium?

• A pot of boiling water on a stove

• A person holding an ice cube in their hand

• A hot cup of coffee on a table in a cold room

• A refrigerator keeping food cold

Which of the following is an example of latent heat?

• Boiling water reaching its boiling point

• A metal rod heating up when placed in a flame

• Ice melting into water at 0°C

• A cup of hot coffee cooling down to room temperature

How does latent heat affect the temperature of a substance during a phase change?

• It causes the temperature to decrease

• It causes the temperature to increase

• It causes the temperature to remain constant

• It causes the temperature to fluctuate randomly