Across
- 3. The force exerted on a body by gravity.
- 6. The transfer of thermal energy.
- 8. An elementary particle that is identical to the nucleus of the hydrogen atom
- 11. Movement back and forth at a regular speed.
- 12. A type of circuit where the current that flows through all the devices is the same
- 13. The set of physical phenomena associated with the presence and motion of electric charge.
- 16. The bending of a wave when it enters a medium where its speed is different.
- 17. The science of the origin and development of the universe.
- 18. The emission of energy as electromagnetic waves.
- 19. Effect observed when the source of a wave moves relative to an observer.
Down
- 1. A closed loop that allows current to flow.
- 2. A reaction in which the products themselves spread the reaction.
- 4. A subatomic particle having the same mass as a given particle but opposite electric or magnetic properties.
- 5. A hypothetical tunnel connecting two separate points in space-time.
- 6. Scientist known for his discovery of the expansion of the universe.
- 7. The basic unit of a chemical element.
- 9. A device that emits light through a process of optical amplification.
- 10. A type of energy possessed by the body due to its motion
- 14. Atoms of the same element with different numbers of neutrons.
- 15. A type of matter hypothesized to account for a large part of the total mass in the universe.