Across
- 2. A polygon with ten sides.
- 5. The branch of mathematics dealing with the properties and relationships of numbers.
- 7. The process of splitting an atomic nucleus into two smaller nuclei.
- 9. The study of the origin, structure, evolution, and eventual fate of the universe.
Down
- 1. A positively charged subatomic particle found outside an atom's nucleus.
- 3. A unit of energy in the International System of Units.
- 4. The force that opposes the relative motion of surfaces in contact.
- 6. The measure of the amount of matter in an object.
- 8. The rate of change of velocity of an object.