Across
- 2. - the amount of mass in a given volume
- 8. – when one element replaces another element in a compound or if 2 elements in different compounds trade places
- 9. - a solid that forms from liquids during a chemical reaction
- 10. - more energy is released as the product forms than is required to break the bonds of the reactants.
- 11. – when 2 or more elements or compounds combine to make a more complex substance. Decomposition – when compounds break down into simpler substances.
- 13. - biological catalysts that help reactions necessary for life occur at body temperature
- 14. - the study of the properties of matter and how matter changes
- 15. - a way to show a chemical reaction, using symbols instead of words
Down
- 1. - where matter can enter from or escape to the surroundings
- 3. - the new substances that form
- 4. - more energy is required to break the bonds of the reactants than is released by the formation of the products.
- 5. - a substance made of two or more elements chemically combined in a specific ratio
- 6. - the substances that undergo the chemical change
- 7. - where matter does not enter or leave
- 12. - during a chemical reaction, matter is not created or destroyed