Across
- 3. the most important part of a system or idea
- 6. the most important part of something
- 8. how much a material resists the flow of electricity
- 10. pairs of electric or magnetic charges with opposite signs
- 12. extremely useful or important
- 13. events or facts that can be observed
- 14. a large amount of something
- 15. to react to something
Down
- 1. shows or makes something known
- 2. finding out or explaining something complicated
- 4. the latest and most advanced tools or methods
- 5. how well a material allows electricity or heat to pass through
- 7. the way something acts or responds
- 9. materials that sometimes conduct electricity
- 11. opposite in effect or direction
- 16. a material that is weakly repelled by a magnetic field