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What is the ray model of light?
a model that shows light travels in straight lines.
Why does a tree cast a shadow?
the tree blocks light that travels in a straight line.
What does the ray model help us predict?
how light behaves when it hits objects.
What is reflection?
when light bounces off a surface.
What is refraction?
when light bends as it passes through a different medium.
What is the law of reflection?
the angle of incidence equals the angle of reflection.
What are opaque objects?
objects that do not let light pass through.
What are translucent objects?
objects that let some light pass through.
What are transparent objects?
objects that let all light pass through.
Why does an opaque object form a shadow?
it blocks all the light.
Why does a translucent object form a dim shadow?
it lets only some light through.
Why does a transparent object form no shadow?
it lets all the light through.
What causes the phases of the moon?
the moon’s position relative to Earth and the Sun.
What is the position of the moon during a new moon?
when the moon is between Earth and the Sun.
What is is the position of the moon during a full moon?
when Earth is between the moon and the Sun.
What does waxing mean?
the moon is getting bigger.
