Across
- 4. A _____ helps control chemical reactions in the body at body temp.
- 6. What is the amount of a substance in a given volume?
- 8. What is the minimum amount of energy needed to start a chemical reaction?
- 10. What type of matter system can not enter or escape to surroundings?
- 12. When more energy is required to break bonds of reactants than released by the formation of product is?
- 14. When ______ happens when one element replaces another element in a compound in a chemical reaction.
- 15. What type of reaction releases energy as a product forms is greater than energy to require to break bonds of reactant?
Down
- 1. A _____ is a material that increases the rate of a reaction by lowering the activation energy.
- 2. What is a solid that forms when 2 liquids are during chemical reaction?
- 3. When ______ happens compounds break down into simpler substances.
- 5. When matter can enter or escape to it surroundings is?
- 7. What are new substances that form from reactants?
- 9. When 2 or more elements combine to make a more complex compound is called a?
- 11. What are substances that undergo chemical reactions?
- 13. What is a material is used to slow down the rate of reactions?