Across
- 2. a chemical bond that forms when atoms share electrons
- 3. the sum of the number of protons and neutrons in an atom
- 5. a substance containing a hydrogen atom and produces hydronium ion when dissolved in water
- 7. release energy as heat
- 9. negatively charged particle that occupies the space in the atom outside the nucleus
- 10. rate of change of velocity with time
- 12. the amount of space occupied by a 3-d object
- 15. an organic compound used by cells to store and release energy
- 23. an attractive force between all objects that have mass
- 24. a vector that represents an object's speed and direction
- 25. a pulling force applied to an object stretch
- 26. neutral particle located in the nucleus of an atom
Down
- 1. a substance that can combine with hydrogen ions and produces hydroxide ions when dissolved in water
- 2. a squeezing force applied to an object that can make an object shrink
- 4. distance between any two crests or trough on a wave
- 6. an influence tending to change the motion of an object or produce motion in a stationary object
- 8. an atom that is no longer neutral because it has gained or lost electrons
- 11. the ability of a material to transfer heart or electricity
- 13. neutral particle that forms as a result of electron sharing
- 14. a tentative explanation that can be tested with a scientific explanation
- 16. occurred when a light ray changes direction as it passes from one material to another
- 17. the return of light, heat or sound after striking a space
- 18. absorbs energy as heat
- 19. one or two or more atoms of an element having the same number of protons in their nuclei but a different number of neutrons
- 20. mass per unit volume of a material
- 21. neutral particle that has no charge
- 22. a covalent compound made up of many small, repeating units linked together in a chain