Unit 7 Review

What is a medium?

• Solid

• Liquid

• Gas

• All of the above

What causes an object to appear green?

• While reflecting all other colors in the visible spectrum, it absorbs green

• While reflecting all other colors in the visible spectrum,it scatters green

• While scattering all other colors in the visible spectrum,it reflects green

• While absorbing all other colors in the visible spectrum, it reflects green

Which best describes white light?

• Only one color of light

• A blend of all reflected colors of light

• The complete absence of light

• None of the above

These types of waves are able to penetrate the human body and be absorbed by bones to produce an image.

• X-Ray

• Microwaves

• Radio

• Infrared

These types of waves are used for cooking food, mobile phone signals, WiFi, and traffic speed cameras.

• Radio

• Microwaves

• Infrared

• Ultraviolet

Some animals are able to see at night, while humans are not. What part of the eye gives them this ability?

• Cones

• Lens

• Tapetum

• Rods

What do all waves carry?

• Matter

• Reflections

• Energy

• Mediums

How is the intensity of sound measured?

• In frequencies

• In amplitudes

• In hertz

• In decibels

During a storm when you see lightning several seconds usually pass before you hear thunder. What is the reason for this?

• Your eyes must work better than your ears

• Only the sound waves transmit energy

• Only the light waves transmit energy

• Light waves travel faster than sound waves

Which is true based on diffraction of sound?

• Sound can only travel in straight paths

• Sound does not travel quickly

• Sound can be heard in other rooms

• None of the above