Chemical Reactions

6. any description or measurement gathered by the senses or instruments
9. a path along which electrical energy can transfer
10. to mix into another substance at the scale of particles
12. the basic building block of matter
13. the systematic study of the natural world
15. a chemical substance that enters into a reaction
16. mass of a substance per unit of volume
17. an advantage, profit, or gain
18. a chemical process that cuts into a solid surface
19. in engineering design, the goals and the desired features of the solution
20. making connections between the results of an experiment and the idea or question being investigated

1. any representation of a system used to help one understand and communicate how it works
2. information gathered from an experiment or observation
3. a chemical substance that is formed by the reactants
4. two or more atoms held together by chemical bonds
5. information that supports or refutes a claim
7. a chemical _____ is a process during which a substance or substances change into one or more new substances
8. in engineering design, something that limits the solution to a problem
11. the ability to cause objects to change, move, or work
14. the simplest pure substances made from just one type of atom