1. HW # 50- Complete Compounds in Bacteria and Mammals worksheet. Revise your Essay. Warm up -What is a compound? How is it different from an element? Week 16, Day One

2. Warm up Response -Element- pure substance with only 1 type of atom (gold, iron, oxygen) -Compound- a group of atoms consisting of different elements (H 2 O, CO 2 ) -Molecule- electrically neutral compound

3. Homework Response/Check D

4. Compounds Worksheet (using your textbook) Begin your homework Work on Essay Revision (Introduction)

5. Element Substance that cannot be broken down into simpler substances. Example: carbon.

7. The most common elements in living things are: Carbon Oxygen Hydrogen Nitrogen

8. Atom The smallest unit of an element

9. Compound A compound is two or more elements that are chemically combined. The smallest unit of a compound is a molecule. An example of a compound is water.

10. Compounds

11. Organic and Inorganic Compounds Inorganic compounds do not contain carbon. Examples: water (H 2 O) & table salt (NaCl). Organic compounds contain carbon and hydrogen and are associated with living things. Examples: (next slide)

12. Four most important groups of organic compounds found in living things are: Carbohydrates Lipids Proteins Nucleic Acids

13. Carbohydrates Energy-rich compound made of carbon, hydrogen, and oxygen Supply energy for cell processes; short-term energy source Most important source of energy for body Sugars-fruits, starch-pasta, and cellulose-found in cell walls of plants

14. Proteins Made of elements carbon, oxygen, hydrogen, nitrogen, and sulfur Regulate cell processes and build cell structure s Made up of smaller molecules linked together chemically called amino acids Enzymes speed up chemical reactions

15. Lipids Energy-rich compounds made of carbon, hydrogen, and oxygen Store large amounts of energy long term; form boundaries around cells Fats, oils, waxes, and cholesterol

16. Nucleic Acids Made of the elements carbon, oxygen, hydrogen, nitrogen, and phosphorus 2 kinds of nucleic acids DNA - Carries hereditary information (chromatin in nucleus) RNA - used to make proteins (cytoplasm & nucleus)

17. Makes up about 2/3 of your body Most chemical reactions in cells require water Helps cells keep their size and shape Helps keep temperature of cells from changing rapidly Water and Living Things