Across
- 2. unit of energy
- 4. a push or pull
- 6. this is a measure of how many waves pass a point in one second. It is measured in hertz
- 9. measures the average kinetic energy of the particles in a substance
- 13. unit of electrical current
- 14. this is a measure of how much space an object occupies
- 17. chemical bonding that involves the electrostatic attraction between oppositely charged ions
- 20. any change in velocity
- 21. this kind of particle is made of a nucleus containing two protons and two neutrons
- 22. this is equal to the force on an object times the distance over which it is applied
- 25. this is the type of energy stored in stretched objects
- 26. number of protons in the nucleus of an atom
- 28. a pure substance consisting only of atoms that all have the same numbers of protons in their nuclei
- 29. scientist that created the three laws of motion
Down
- 1. this is the time it takes for half of a radioactive substance to decay
- 3. chemical bond that involves the sharing of electron pairs between atoms
- 5. this is what provides the force needed to move charges in a circuit
- 7. movement of charged particles
- 8. this is stored energy
- 10. for every action, there is an equal and opposite what?
- 11. simple machines provide mechanical what?
- 12. technical term for radiation in the form of light
- 15. has a negative charge
- 16. mass per unit volume
- 18. another name for thermal energy
- 19. this is a measure of how much matter an object is made of
- 23. speed and direction
- 24. the smallest unit of ordinary matter that forms a chemical element
- 27. this is a circuit's opposition to the flow of electricity