Across
- 1. a pure substance made from two or more elements that are chemically combined
- 2. the substances formed during a chemical reaction, usually indicated on the right-hand side of a chemical equation
- 3. a substance that binds to an enzyme and reduces its activity, tus slowing a chemical reaction that the enzyme catalyzes
- 4. the ability to do work. Especially in biology, the driver of the physical and chemical processes necessary for life.
- 6. the process by which one substance, the solute, is broken up into smaller pieces by and distributed within a second substance, the solvent
- 7. quality of molecules having an uneven distribution of electrical charge, resulting in some regions of a molecule having negative charge while others are positive
- 10. an attraction between two atoms as a result of sharing or transferring valence electrons
- 11. a class of simple organic compounds important in living things as a source of borth energy and structure
- 14. the smallest particle of a covalently bonded compound
- 16. a change in a substance that does not change the identity of the substance (e.g., a change of form or state)
- 18. a naturally occurring catalyst, usually a protein
- 19. the attraction between like particles within polar substances
- 20. a substance that changes the rate of a chemical reaction but is not itself used up or affected by the reaction
- 21. a substance that is present before a chemical reacion and takes part in it, usually shown on the left-hand side of a chemical equation
- 24. a change in a substance that results in one or more new substances being formed that have different physical and chemical properties than those of the original substance
- 25. a pure substance made of only one kind of atom
Down
- 1. an organic compounds comprised of the elements carbon, hydrogen, and oxygen; includes sugars, starch and cellulose
- 5. the tendency of energy to disperse and become less available to do work
- 8. a measurement of the average speed of the particles within a substance
- 9. a substance that can produce hydrogen ions (H+) in solution
- 12. the attraction of particles in one substance to particles in a different substance
- 13. a covalently bonded compound containing the element carbon
- 15. a class of nonpolar organic compounds that are insoluble in water and are used for energy storage and cell membranes in living things
- 17. the building block of matter; the smallest possible particle of an element
- 22. a class of organic compounds that serve as the building blocks of protein
- 23. the physical stuff that makes up the universe. Anything that occupies space and has mass.