What types of waves can travel through empty space AND mediums?

• Longitudinal

• Mechanical

• Transverse

Which type of waves must have a medium in order to travel?

• electromagnetic (transverse) wave

• mechanical wave

Which type of wave does NOT require a medium to travel?

• electromagnetic (transverse) wave

• mechanical wave

What is a medium?

• something between a small and a large?
• the substance through which a wave can travel
• a pattern of vibration that simulates when a wave is standing still
• the distance from any point on a wave to an identical point on the next wave

A medium can be a .....

• solid
• liquid
• gas
• all of the above

Sound waves usually travel fastest through:

• solids

• liquids

• gases

Light waves travel the fastest through ---

• Liquids

• Gases

• Solids

What is the picture an example of?

• Reflection

• Refraction

• Diffraction

• Scattering

When you look in the mirror, you see an image of yourself? What property of the wave is responsible for this?

• Reflection

• Refraction

• Diffraction

• Absorption

Why the sky look blue during midday and red during sunset

• Reflection of light

• Refraction of light

• Dispersion of Light

• Scattering of Light