reflect, the action of light bouncing off a surface, source, where something comes from, proof, scientific evidence that something is true, prove, to find proof that something is true when doing a scientific investigation, ray, a line that light travels in, ray diagram, a diagram to show how light travels, absorb, to take in a substance, image, a picture of the object that you see on a screen or in a mirror, mirror, a very smooth, shiny surface that reflects light well, reflection, when light bounces off a surface, surface, the top layer that is next to the air, asteroid, a rocky mass that orbits the Sun, closest, the one that is nearest, comet, a lump of ice and dirt which moves in a large orbit around the Sun, furthest, the one that is the most far away, orbit, the movement of a body in space around a larger body in space, solar system, the Sun and the planets, moons, comets and asteroids which move around it, spacecraft, a vehicle for travelling in space, anticlockwise, the opposite of clockwise which is the direction the hands of the clock move, axis, anything that spins or rotates has to turn around a central line, this line is the axis, globe, the model of the Earth, spin, a verb that means to turn very fast, titled, at an angle, not vertical, apparent movement, this means that the movement does not really happen but it looks like it happens

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