Across
- 2. A naturally ocurring catalyst, usually a protein
- 4. A class of organic compounds that serve as the building blocks of proteins
- 10. The attraction between like particles within polar substances
- 12. A change in the substance that results in one or more substances being formed that have different physical and chemical properties than those of the original substance
- 14. A substance that is present before a chemical reaction and takes part in it
- 15. A class of nonpolar organic compounds that are in soluble in water and are used for energy storage and cell membranes in living things
- 17. The attraction of particles in one substance for particles in a different substance.
- 18. The ability to do work
Down
- 1. The basic building block of matter
- 2. Pure substances made by only one kind of atom
- 3. An organic compound comprised of the ele ments carbon, hydrogen, and oxygen; includes sugars, starch and cellulose
- 5. The substances formed during a chemical reaction
- 6. A change in the substance that does not change the identity of the substance, the change of the form of state
- 7. A class of organic compounds that serve as the building blocks for the information storage molecules DNA and RNA
- 8. An attraction between two atoms as a result of sharing or transferring valence electrons
- 9. A class of simple organic compounds important in living things as a source of both energy and structure
- 11. A measurement of the average speed of the particles within a substance
- 12. A pure subtance made from two or more elements that are chemically combined
- 13. A substance that changes the rate of the chemical reaction but is not itself used up or affected by the reaction
- 16. The tendency of energy to disperse