Mechanical and Electromagnetic Waves

What is a key difference between mechanical and electromagnetic waves?

• Mechanical waves can travel through a vacuum.

• Electromagnetic waves require a medium to travel.

• Mechanical waves require a medium to travel.

• Electromagnetic waves cannot travel through space.

Which of the following is an example of a mechanical wave?

• Light from a star

• Microwaves

• Sound from a drum

• Radio waves

How do seismic waves travel?

• Through the Earth's surface

• Through electromagnetic fields

• Through space

• Through a vacuum

What happens to sound in a vacuum?

• It becomes louder

• It travels faster

• It cannot be heard

• It changes frequency

Which waves can travel through both a medium and a vacuum?

• Sound waves

• Water waves

• Seismic waves

• Electromagnetic waves