Thermal | MCQs

Explanation

• Thermal energy is the form of energy that is transferred from one body to another due to a difference in temperature, and is received from heat.
• It is the energy of motion of particles in a substance, such as atoms or molecules, and is often referred to as "heat energy".

Explanation

• In a solid, the particles are closely packed and have a fixed position.
• But they still have some freedom to vibrate or oscillate in place, due to their thermal energy.

Explanation

Matter changes state from:

• Solid to liquid (melting) when it gains energy
• Liquid to gas (vaporization) when it gains energy

This is because the particles need more energy to break free from their rigid structure in solids and move more freely in liquids, and even more energy to escape into the air as gases.

Explanation

• A thermal conductor is a material that allows heat energy to flow through it easily.
• Such as metals like copper, aluminum, and iron.

Explanation

The properties used to describe heat are:

• Hot (high temperature)
• Energy (thermal energy)
• Cold (low temperature)

Explanation

The first modern air conditioner was invented in 1902 by Willis Haviland Carrier.

He was a skilled engineer who began experimenting with the laws of humidity control.

This was to solve an application problem at a printing plant in Brooklyn, NY.

Explanation

Heat energy is responsible for changing the state of matter.

Such as:

• Melting (solid to liquid).
• Freezing (liquid to solid).
• Evaporation (liquid to gas).
• Condensation (gas to liquid).