Across
- 9. emit (energy, especially light or heat) in the form of rays or waves.
- 10. the end of a magnet where the magnetic field is strongest
- 13. a type of energy that travels in waves through space at the speed of light
- 14. the flow of electric charge, usually electrons, through a conductor like a wire
- 15. an instrument for detecting or measuring a small electric current by movements of a magnetic needle or of a coil in a magnetic field
- 16. a material that doesn't allow electricity or heat to pass through it easily
- 17. occurs when an object has fewer electrons than protons
- 19. explains the three-dimensional shapes of molecules by assuming that electron pairs around a central atom repel each other and arrange themselves to minimize this repulsion
- 20. a material that allows electricity (or heat) to flow through it easily
Down
- 1. the north-seeking end of a magnet or the terminal of a battery or cell connected to the positive plate
- 2. the pole of a magnet that points toward the south when the magnet is suspended freely
- 3. waves that are created as a result of vibrations between an electric field and a magnetic field
- 4. a device that converts mechanical energy into electrical energy
- 5. the invisible area surrounding a magnet where its magnetic force can be felt
- 6. a magnetic field that surrounds our planet
- 7. to push away or force apart
- 8. the force that causes certain objects, like magnets, to attract or repel each other due to an invisible field surrounding them
- 11. a force that pulls objects or particles together
- 12. an object has more electrons than protons, resulting in an overall negative electrical state
- 18. an atom or group of atoms that has an electric charge