Across
- 2. Characteristics that you can observe or measure without changing the identity of the matter.
- 5. Chemical reaction where more energy is needed to start the reaction.
- 10. Mass per unit volume of a substance.
- 12. Stored energy due to the interactions between particles.
- 14. A group of atoms that are held together by chemical bonds and act as a unit.
- 15. Chemical reaction where more energy is released during the reaction.
- 16. The amount of thermal energy transferred from regions of higher temperature to regions of lower temperatures.
- 18. Property which occurs when a substance reacts with another substance, changing it into a new substance.
- 21. Characteristic of matter that can be observed as it changes to a different type of matter.
Down
- 1. A group of chemical symbols and numbers that represent the element and the number of atoms of each element that makes up a compound.
- 3. The substance produced by the chemical reaction.
- 4. Energy in motion.
- 6. The measure of the average kinetic energy of the particles in a material.
- 7. The starting substance in a chemical reaction.
- 8. A substance made of only one type of atom.
- 9. The ability of a type of matter to burn easily.
- 11. The amount of space a substance takes up.
- 13. Matter with a composition that is always the same.
- 14. The amount of matter in a substance.
- 17. A small particle that is the building block of matter.
- 19. Matter changes into other substances with different chemical and physical properties.
- 20. Type of substance that occurs when atoms of two or more different elements are bonded together.