Across
- 2. a class of nonpolar organic that are insoluble in water and are used for energy storage and cell membranes in living things.
- 4. a class of organic compounds that serve as the building blocks of protein
- 6. a substance that is present before a chemical reaction and takes part in it, usually shown on the left-hand side of a chemical equation
- 10. a class of simple organic compounds important in living things as a source of both energy and structure
- 12. the ability to get things done.
- 14. a change in the substance that results in one or more new substances being formed that have different physical and chemical properties than those of the original substance.
- 15. the attraction of particles in one substance for particles in a different substance
- 17. a naturally occurring catalyst, usually a protein
- 18. the substances formed during a chemical reaction, usually indicated indicated on the right-hand side of a chemical equation
- 19. pure substance made of only one kind of substance
Down
- 1. a pure substance made from two or more electrons that are chemically combninea
- 3. a substance that changes the rate of a chemical reaction but its not itself used up or affected by the reaction
- 5. a class of of organic compounds that serve as the building blocks for the information storage molecules DNA and RNA
- 7. a change in substance that does not change the identity of the substance
- 8. an organic compound comprised of the elements carbon, hydrogen, and oxygen; includes sugars, starch and cellulose
- 9. a measurement of the average speed of the particles within a substance
- 11. the basic building blocks of matter
- 13. an attraction between two atoms as a result of sharing or transferring valence electrons
- 14. the attraction between like particles within polar substances
- 16. the tendency of energy to disperse and become less available to do work