The Science Behind Sight

How do the lenses in glasses work?

• They turn images upside down so the brain has to do less work.

• They bend light to focus it on the right spot on the retina.

• They help the eye to see what is moving on all sides.

• D They let more light into the pupil.

How does the author support the idea that sight is an important sense?

• by listing the different tasks sight helps with

• by explaining that people need light to see

• by stating the names of all of the senses, including sight

• by sharing that people can see objects that give off light

The passage states that some materials reflect light. What does reflect mean?

• to use up

• to bounce back

• to make bigger

• to bring into being

What causes the pupil to become smaller?

• blinking the eye

• being in a place that is dark

• putting bright light into the eye

• looking at an object that is far away

The author states that animals with eyes at the sides of their heads cannot tell how far away something is. Why does the author state this?

• to explain why most animals that hunt have eyes in the front

• to explain why it is good for an animal to be able to see behind it

• to support the idea that some animals see things differently than people do

• to support the idea that the body parts of different animals perform special jobs

If something is ____________ it gives off light.

• dark
• see through

• dim
• luminous

If an object is ___________ you can see through it.

• dim

• transparent
• reflective
• dark

When light ____________ of a surface, it bounces back without passing through the surface.

• sticks to

• reflects
• transmits
• absorbs

Something that ____________ gives off lights and makes the are around it brighter.

• reflects
• absorbs
• illuminates
• dims

If you __________ something, you guess or estimate the size or amount of something.

• judge

• calculate
• measure
• assess