Which of the following is NOT an example of a wave phenomenon?

• Dropping a stone in a pond

• Hearing a sound

• Seeing your mom

• Writing a letter

Answer explanation

The correct choice is 'Writing a letter' because it does not involve a wave phenomenon, unlike dropping a stone in a pond, hearing a sound, or seeing your mom.

What is a wave?

• A repeating movement that transfers matter.

• A single vibration that transfers energy.

• A repeating movement, disturbance, or vibration that transfers energy.

• A static disturbance that does not transfer energy or matter.

Answer explanation

A wave is a repeating movement, disturbance, or vibration that transfers energy, making this the correct choice.

Does a wave transfer matter along with energy?

• Yes, it transfers both matter and energy.

• No, it only transfers energy, not matter.

• Yes, but only in the case of electromagnetic waves.

• No, it does not transfer energy or matter.

Answer explanation

Waves only transfer energy, not matter. They propagate through a medium by transferring energy without displacing the particles of the medium.

What do all waves carry from place to place?

• Matter

• Energy

• Light

• Heat

Answer explanation

Waves carry energy from place to place, not matter, light, or heat. Energy is the correct choice as it is the fundamental property transferred by waves.

How do molecules in a wave pass energy?

• By moving from one place to another

• By passing energy to the next neighbor

• By absorbing energy from the wave

• By producing vibrations

Answer explanation

Molecules in a wave pass energy by passing energy to the next neighbor, transferring the energy along the wave.

What is necessary for waves to continue traveling?

• Constant absorption of energy by a medium

• Presence of matter in the path

• Energy to carry

• A decrease in energy

Answer explanation

Waves need energy to carry in order to continue traveling.

What happens to a wave once the energy is absorbed by a medium?

• The wave changes direction

• The wave increases in speed

• The wave ceases to exist

• The wave transforms into matter

Answer explanation

The wave ceases to exist as the energy is absorbed by the medium, leading to the wave dissipating.

How are all waves produced?

• By chemical reactions

• By electrical currents

• By vibrations

• By temperature changes

Answer explanation

Waves are produced by vibrations, not by chemical reactions, electrical currents, or temperature changes.

What do waves move according to the image?

• Matter

• Energy

• Boats

• Air

Answer explanation

Waves move according to energy, not matter, boats, or air. Energy is the correct choice as waves transfer energy through a medium.

What happens to the boat when waves move according to the image?

• It moves to a different place.

• It stays in the same place.

• It sinks.

• It speeds up.

Answer explanation

The boat stays in the same place because the waves are moving, not the boat itself. The boat will rise and fall with the waves but will not change its position.