Across
- 2. A reaction in which one element replaces another in a compound or when two elements in different compounds trade places.
- 4. Change A change in which one or more substances combine or break apart to form new substances.
- 5. A substance formed as a result of a chemical reaction.
- 7. A chemical reaction that breaks down compounds into simpler products.
- 9. System A system in which matter can enter from or escape to the surroundings.
- 10. Law of the Conservation of Mass The principle that the total amount of matter is neither created nor destroyed during any chemical or physical change.
- 12. Change A change that alters the form or appearance of a material but does not make the material into another substance.
- 13. A substance that enters into a chemical reaction.
- 14. A solid that forms from a solution during a chemical reaction.
- 15. A reaction that absorbs energy, often in the form of heat, becoming colder.
Down
- 1. A number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction.
- 3. Equation A short, easy way to show a chemical reaction, using symbols.
- 6. System A system in which no matter is allowed to enter or leave.
- 8. A reaction that releases energy, usually in the form of heat, becoming warmer.
- 11. A chemical reaction in which two or more simple substances combine to form a new, more complex substance.