1. Chapter 3 Review Chemistry of Life

2. Atoms The smallest unit of matter that cannot be broken down by chemical means

3. Covalent Bonds Bonds between the atoms that make up water molecules

4. Ions An atom that has either has lost or gained an electron

5. Solutions Is a mixture of evenly distributed substances

6. Water Water is polar and therefore polar substances dissolve in it.

7. Chemical Reactions In chemical reactions energy may be absorbed, released, and required.

8. Energy Without energy organisms can not: – Maintain homeostasis – Carry out chemical reactions – Make their own food

9. Carbon The basic unit of most biomolecules contain

10. Compounds Are formed when atoms of two different elements join together

11. Enzymes Reduce the activation energy of chemical reactions

12. Basic Having a pH between 7 and 14

13. Cohesion An attraction between substances of the same kind

14. Adhesion An attraction between different substances

15. Acid

16. Acids Are compounds that form extra hydronium ions when dissolved in water

17. RNA Subunits are made of a sugar, a base, and a phosphate group

18. Carbohydrates A class of organic compounds made of carbon, hydrogen, and oxygen atoms in a 1:2:1 ratio

19. Lipids A class of organic compounds that include fats, steroids, and waxes

20. ATP Provides temporary storage of energy for cells

21. Protein A molecular chain of amino acids

22. pH A measure of the concentration of hydronium ions in solutions

23. Test Tomorrow on Chapter 2 Please Study these notes