1. Levels of Organization and Chemical Compounds
How do cells work together in an organism?
What is an organic compound?

2. Organization of your Body
Cell
Tissue
Organ
Organ System
Organism
C-T-3O – Think Star Wars

3. Chemical Compounds in Cells
An element is a substance that cannot be broken down into simpler substances
Compounds form when two or more elements combine chemically
Compounds that contain Carbon are referred to as organic compounds
SPONCH – Sulphur, Phosphorus, Oxygen, Nitrogen, Carbon, and Hydrogen

4. What Compounds do Cells Need?
Important groups of organic compounds that cells need are carbohydrates, lipids, proteins, and nucleic acids
Water is a necessary inorganic compound

5. Carbohydrates
These are energy rich compounds made of carbons, hydrogens, and oxygens
Photosynthesis in plants produces sugars
Found in high levels in fruits and some vegetables
Sugar molecules can combine to form starches
Carbohydrates are found in cell walls in plants and cell membranes

6. Lipids (Fats) Made mostly of carbon and hydrogen with some oxygen
Fats, oils, and waxes are all lipids
Lipids contain more energy than carbohydrates

7. Proteins
Large organic molecules made of carbon, hydrogen, oxygen, nitrogen, and in some cases, sulfur
make up parts of the organelles within a cell
Enzymes speed up chemical reactions within living things

8. Nucleic Acids Very long organic molecules C, O, N, H, P
Contain the instructions for a cell to carry out life
DNA – Deoxyribonucleic Acid – genetic material (shape – double helix) that carries information about an organism and is passed from parent to offspring

9. Water (H2O) and living things
Water is crucial in transportation within and between cells
Water helps cells maintain shape
Water changes temperature slowly
Without water, life would not exist as we know it

10. Cells and Homeostasis
Homeostasis – the maintenance of stable internal conditions that are necessary for life functions
Processes that help maintain homeostasis include getting and using energy from food and removing wastes
Diffusion – molecules move from an area of higher concentration to and area of lower concentration
Active transport – movement of materials across a cell membrane using cellular energy

11. Reproduction of Cells
Cell division – process in which one cell splits into two identical cells that are genetically identical to the original
Reproduction of cells is one of the ways multicellular organisms maintain homeostasis