1. WARM-UP #1 11/30 1. Write down these 3 formulas:  Surface area (cm2) = length x height x 6 (sides)  Volume (cm3) = length x width x height  Surface Area to volume ratio (cm) = surface area volume 2. Calculate the surface area and volume of the cube: Length = 3cm Width = 3cm Height = 4cm

2. Answer  Surface area = 3x3x6=54  Volume = 3x3x4 = 36

3. Warm-Up #2 12/1 If a girl sprays perfume in the corner of a room, why can I smell it on the opposite side of the room?

4. Answers It diffuses across the room. It moves from an area of high concentration to an area of low concentration.

5. Warm-Up #3 12/2 Write question & answer!  1. What must cells do in order to grow and divide?  A. Make food B. produce energy  C. reproduce D. take in nutrients 2. How do cows obtain the food they need? A. They produce it using sunlight. B. They eat plants which make food through photosynthesis. C. They produce food from energy released by their cells. D. They convert gases in the air to food their cells can use.

6. Answer  1. D  2. B

7. Warm-Up #3 12/3  The graph compares the surface area to volume ratio with the diameter of the cell. Based on the graph, which increase in diameter results in the greatest drop in surface area to volume ratio? 0 2 4 6 51015 Cell Diameter (mm) Surface are to volume ratio A. 1 to 2 mm B. 3 to 4 mm C. 5 to 6 mm D. 7 to 8 mm

8. Warm-Up#4 12/4 Write out sentence and fill in blank!  1. Osmosis benefits plants by bringing in ________.  2. A cell does not need to use energy during _________ transport such as d__________ and o________.