Objects that cannot make their own light are ____________.

Light travels in straight lines called _______________.

A __________ is formed when an opaque object blocks the light.

An object that is ________ allows some, but not all, light rays to pass through.

_______________ objects allow all light to pass through.

The colors we see are the colors that are ____ by the objects around us.

The opening in the iris that allows light to enter the inside of the eye is the _________.

The part of the eye that refracts light to focus it is the ___________.

The transparent, curved covering in the front of the eye is the _______.

The back part of the eye where an image forms is the ___________.

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