Across
- 4. breaking apart of a nucleus into smaller nuclei
- 5. very high-speed electron
- 8. mass and energy cannot be created or destroyed; they can only change forms
- 9. very energetic electromagnetic radiation
- 12. process whereby a nucleus releases radioactive particles and energy
- 13. weapon powered by fission
- 16. reaction inside plants that combines water, carbon dioxide, and sunlight to produce sugar and oxygen
- 18. weapon powered by fusion
- 19. combining of nuclear particles to form a larger nucleus
- 20. energy that travels in waves through matter such as air, water, or wood and can be detected by the human ear
- 21. electromagnetic waves that can be detected by the eye
- 22. energy that is in motion
- 24. flow of electrons
- 25. energy of movement
- 26. energy that is stored
- 27. releasing of energy through burning
- 28. energy stored in the nucleus of an atom
Down
- 1. another name for digestion
- 2. energy that comes from plant and animal matter
- 3. process that breaks down sugar molecules to release the stored energy
- 6. another name for a thermonuclear bomb
- 7. material with unstable nucleus
- 10. attractive and repelling forces contained in magnetic materials
- 11. measuring the amount of radioactive elements in a substance to determine its age
- 13. two protons and two neutrons with no electrons
- 14. petroleum products formed from the remains of plants and animals that were buried in the past and placed under pressure
- 15. total kinetic energy that an object's molecules possess
- 17. ability to perform work
- 23. energy stored in chemical bonds