1. Chemical Compounds in Living Things

2. Elements
An element is any substance that cannot be broken down into simpler substances.
The smallest unit of an element is an atom.
What are some examples of elements?

3. Compounds
A compound is two or more elements that are chemically combined.
Smallest unit = molecule.
What are some examples of compounds?

4. Water Water makes up about 2/3 of your body
Water plays an important part in cells
Allow chemical reactions to happen
Helps keep size & shape in cells
Helps keep temperature constant

5. Organic and Inorganic Compounds
Inorganic compounds do not contain carbon.
Organic compounds contain carbon and hydrogen and usually are associated with living things.

6. Four groups of Organic Compounds
Carbohydrates
Lipids
Proteins
Nucleic Acids

7. Carbohydrates Made of the elements carbon, hydrogen, and oxygen
Supply energy for cell processes; our body uses them as short-term energy storage
Foods such as fruits, vegetables, and grains are examples.

8. Lipids Made of the elements carbon, hydrogen, and oxygen
Store large amounts of energy long term; form boundaries around cells
Fats, oils, waxes, phospholipids, and cholesterol

9. Proteins
Made of the elements Carbon, Oxygen, Hydrogen, Nitrogen, and sometimes Sulfur
Made up of amino acids
20 different ones making thousands of different proteins
Regulate cell processes and build cell structures
Examples are meat, dairy, nuts
Enzymes
Enzyme- speeds up chemical reactions

10. Nucleic Acids
Made of the elements carbon, oxygen, hydrogen, nitrogen, and phosphorus
Carry hereditary information; used to make proteins
DNA and RNA