Vision and Light Chapter 2

What is the order in which light travels for an animal to be able to see an object?

• Light travels from a source towards an object, then reflects off of the object and into the eye for an animal to see the object.

• Light travels from a source towards the eye of an animal, then reflects off the pupil and towards the prey so the predator can see it.

• Light travels from a source towards an object, then reflects off the eye of an animal, and finally onto the object

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Why do scientists change only one variable at a time?

• to slow down the progress

• So they can tell if changing a variable made a difference.

• because it is illegal to do more than one

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The pupil...

•  lets light into the eye

•  responds to light

• takes information to the brain

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to cause light to bounce off a material

• evidence

• reflect

• explanation

• variable

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something that can change in an investigation

• model

• predator

• prey

• variable

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an animal that is hunted and eaten by other animals

• model

• predator

• prey

• variable

an animal that hunts and eats other animals

• model

• predator

• prey

• variable

something that scientists make to answer questions about the real world

• model

• predator

• prey

• variable

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Light allows an animal to get information from its environment using its

• nose

• ears

• mouth

• eyes

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Geckos rely on this sense to find prey…

• vision

• touch

• hearing

• taste

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