Science 8 Practice Final Exam 1

Light can only travel around a corner if it:

• Refracts in water

• Bends due to gravity

• Reflects off a surface

• Passes through a filter

The retina in the human eye is most similar to which part of a camera?

• Lens

• Aperture

• Flash

• Film

Which of the following objects is opaque?

• Clear plastic cup

• Frosted glass

• Aluminum foil

• Wax paper

Which material would most likely cause light to scatter in many directions?

• Clear glass

• Polished mirror

• White wall

• Tinted plastic

A beam of light travels from water into air. What happens to the beam?

• Slows down and bends away from the normal

• Speeds up and bends away from the normal

• Speeds up and bends toward the normal

• Reflects back into the water

In a periscope, how many reflections typically occur to view around an object?

• 0

• 1

• 2

• 4

Which feature of the eye controls the amount of light entering it?

• Retina

• Lens

• Iris

• Cornea

What does a convex lens do to light rays passing through it?

• Spreads them apart

• Reflects them

• Refracts them outward

• Brings them together

Why does a black shirt feel warmer in sunlight than a white shirt?

• It reflects all colour wavelengths

• It absorbs all colour wavelengths

• It transmits all colour wavelengths

• It refracts all colour wavelengths

Which of the following best explains why shadows are formed?

• Light slows down

• Light bends

• Light travels in straight lines

• Light changes color