Across
- 6. Change that takes place when two or more substances interact to form new substances.
- 9. A way of describing the number of atoms that make up one molecule of a compound.
- 10. Transfer of energy in the form of electromagnetic waves.
- 13. Compounds or elements that are the result of a chemical reaction
Down
- 1. Chemical reaction in which energy is absorbed, usually getting colder.
- 2. States that matter can neither be created nor destroyed, it can only change form.
- 3. Chemical reaction in which energy is given off, usually as thermal energy.
- 4. States that energy cannot be created or destroyed, it can only change form or be transferred.
- 5. Thermal energy
- 7. Transfer of heat in a fluid in which the warmer fluid rises and the cooler fluid sinks in currents.
- 8. Compounds or elements that change during a chemical reaction.
- 9. Transfer of heat through direct contact.
- 11. A way of writing changes in the arrangement of atoms during a chemical reaction using chemical symbols.
- 12. Substance that helps start or speed up a reaction between two other substances, without being changed by the reaction.