What is the primary way waves transfer energy?

• By moving matter from one place to another

• By creating electrical currents

• By causing disturbances that transfer energy without permanently moving matter

• By converting energy into mass

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

• Sound waves

• Water waves

• Seismic waves

• X-rays

What do mechanical waves require in order to travel?

• A source of heat

• A medium (solid, liquid, or gas)

• A vacuum

• An electric charge

What is the key difference between mechanical and electromagnetic waves?

• Mechanical waves transfer energy, while electromagnetic waves do not

• Electromagnetic waves need a medium, while mechanical waves do not

• Mechanical waves need a medium to travel, while electromagnetic waves can travel through a vacuum

• Electromagnetic waves are always visible, while mechanical waves are not

Which of the following correctly describes transverse waves?

• The particles move parallel to the wave direction

• The particles move perpendicular to the wave direction

• The wave travels only in one direction

• The wave can travel only through solids

Why can sound not be heard in space?

• Space absorbs sound waves

• Sound waves need air to travel, but space is a vacuum

• Sound waves move too fast in space to be detected

• Electromagnetic waves block sound waves in space

How does a microwave oven heat food?

• By producing heat that directly warms the food

• By generating sound waves that cook the food

• By transferring energy to water molecules, making them vibrate and produce heat

• By reflecting visible light waves onto the food

Which of the following is an example of an electromagnetic wave?

• Water wave

• Sound wave

• X-ray

• Seismic wave