Across
- 6. a chemical reaction that takes in heat
- 7. a reversible or irreversible alteration to the form, state, or appearance of matter without changing its chemical composition or creating new substances.
- 8. any fuel made from fossils like coal or gasoline
- 9. any fuel made from a living plant
- 10. An independent variable is the variable that is changed, manipulated, or controlled in a scientific experiment or mathematical formula to test its effects on a dependent variable.
- 12. a substance, compound, or entity formed as a direct result of a chemical reaction, biological process, or physical transformation.
Down
- 1. Density is a physical property defined as the amount of mass per unit volume of a substance
- 2. a chemical reaction that gives off heat
- 3. a symbolic representation of a chemical reaction, using formulas and symbols to show the conversion of reactants into products.
- 4. a substance present at the start of a chemical reaction that is consumed, changed, or rearranged to form new substances called products.
- 5. A reactant is a substance present at the start of a chemical reaction that is consumed,
- 11. the factor being measured, tested, or observed in an experiment, representing the outcome or effect of the study.
- 13. occurs when one or more substances transform into entirely new substances with different chemical properties