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Science matters!
| boiling point | the boiling point of a substance is the temperature at which the substance changes from a liquid to a gas |
| lens | a lens is a curved piece of clear material that bends [refracts] light rays as they pass through it (the lens) |
| convex lens | a lens that is thicker in the middle than at the edges bends light rays toward one another; (example: lens found in an eye and telescope) |
| concave lens | a lens that is thicker at the edges than in the middle bends light rays away from one another |
| fulcrum | fulcrum is the fixed point that the lever rests on |