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4th Grade Science

Across
The ability to do work
The nerve that carries light to your brain
Colored part of eye
the energy that is stored in an object due to its position
an instance of one moving object or person striking violently against another.
White part of your eyes
Down
The return of light from a surface
The strength of a moving object. Usually determined by its speed and weight
The energy of an object in motion
Clear covering that rests over your pupil
Dark circle in the center of the iris
Clear part inside your eye that refracts light