2. Impact- a big change that will affect people
3. Legacy- what a person leaves behind after they do something
4. Polytheism- belief in more than one god
5. Astrolabe- an instrument used to make measurements of the position of celestial bodies
6. Pulley block-a block or casing in which one or more pulleys are mounted.
7. Wood screw-a tapering metal screw with a sharp point.
8. Casting-an object made by pouring molten metal or other material into a mold.