Temperature and Heat

Temperature is:

• A sensation

• The transfer of energy

• A scale

• When something feels cold

Answer explanation

Temperature is a scale used to measure how hot or cold something is. It quantifies thermal energy, distinguishing it from sensations or energy transfer.

Heat IN PHYSICS is:

• The transfer of energy between two substances

• A scale

• When something feel cold

• A sensation

Answer explanation

Heat is defined as the transfer of energy between two substances due to a temperature difference. This distinguishes it from sensations or scales, making the first option the correct answer.

When the particles of a substance expand, the temperature is low

• True

• False

Answer explanation

The statement is false because when particles of a substance expand, it typically indicates an increase in temperature, not a decrease. Expansion often occurs when a substance is heated.

A hot object tends to become a colder body, this is known as HEAT TRANSFER

• TRUE

• FALSE

Answer explanation

The statement is TRUE because heat transfer is the process where a hot object loses heat to become cooler, moving towards thermal equilibrium with its surroundings.

The importance of the measuring of temperature can be found in many fields, mention one

What happens to the particles of a substance when it is heated?

• They contract

• They expand

• They remain the same

• They freeze

Answer explanation

When a substance is heated, its particles gain energy and move faster, causing them to expand. This is why the correct answer is that they expand, as opposed to contracting, remaining the same, or freezing.

Heat always flows from:

• A colder object to a hotter object

• A hotter object to a colder object

• Objects of the same temperature

• None of the above

Answer explanation

Heat always flows from a hotter object to a colder object, following the second law of thermodynamics. This means that energy naturally moves towards equilibrium, making the correct choice 'A hotter object to a colder object'.