Across
- 1. Also known as combustion, is a chemical reaction where a substance reacts with oxygen gas, releasing energy in the form of light and heat
- 3. A change in matter that can change the form of the matter without changing the chemical composition of it (examples: melting, freezing, evaporating, etc.)
- 6. Observations that indicate a chemical change or reaction. These changes can occur due to various factors such as temperature changes, light given off, or the formation of bubbles1. For example, leaves changing color in the fall
- 7. A result of a chemical reaction caused by the release of a gas
- 8. The solid created from a solution in which a chemical reaction has occurred
- 9. A change that occurs due to a chemical reaction in which substances combine or decompose to form one or more different substances
Down
- 2. In a chemical reaction, a change in thermal energy can occur due to the breaking or formation of chemical bonds12345. When the chemical bonds of the reactants are broken, excess energy is released, causing heat to be discharged/absorbed and leading to an increase/decrease in temperature
- 4. A process in which one or more substances are converted to one or more different substances
- 5. A chemical reaction that produces heat and light