A) Which of these blocks would have the fastest diffusion of substances to the c
ID: 50326 • Letter: A
Question
A) Which of these blocks would have the fastest diffusion of substances to the center of the block?
1.5cm x 1.5cm x 1.5cm
10cm x 10cm x 10cm
0.5cm x 0.5cm x 0.6cm
3cm x 2cm x 2cm
Which of these blocks would have the highest surface area to volume ratio?
1.5cm x 1.5cm x 1.5cm
10cm x 10cm x 10cm
0.5cm x 0.5cm x 0.6cm
3cm x 2cm x 2cm
C)
In experiment 2, which had the shortest time required for complete color change?
1cm x 1cm x 1cm
1cm x 1xm x 2cm
1cm x 1cm x 6cm
D)
What is the surface area to volume ratio of a cube that is 3cm x 3cm x 3cm?
9
4
2
0.5
1.5cm x 1.5cm x 1.5cm
10cm x 10cm x 10cm
0.5cm x 0.5cm x 0.6cm
3cm x 2cm x 2cm
Lab 5: Chemistry of Life Experiment 2: The Effect of Surface Area and Volume Have you ever wondered why cells don't grow past a certain size? There is a size limit for cells that they cannot surpass. Once they reach their maximum size, they divide and form two smaller cells. Why do they do that? We will look at the importance of surface area to volume ratios in this experiment to help you understand. Ruler Kitchen knife* Microwave Hot pads* *You must provide Materials 1 Nutrient Agar Bottle (125 ml) 10 mL Bromothymol Blue Plastic wrap Pipettes Vinegar 2 mL Sodium bicarbonate (1) 250 mL beaker Rectangular mold Note: This experiment requires preparation 24 hours in advance. * To determine surface area, multiply Length x Width of each side of the cube and then add them together. This should be 6 different values added up. For example, if a cube were 3 cm x 3 cmx 3 cm each side would have a Lxw=9cm. There are six sides in a cube so you would add up the L x W, in this case 9 cm2 for all six sides. That would give you a surface area of 54 cm2. f all the sides are not the same length, you would determine the length x width for all six sides and add them up as well. *To determine volume, simply multiple Length x Width x Height. 9 cm2 *To determine surface area to volume ratio, simply divide the sur- face area by the volume. Procedure 1. Begin by removing the cap off the agar solution and placing it in the microwave for 30 se- conds. While in the microwave, watch the solution for boil-over. If it begins to boil-over, im-Explanation / Answer
A) 0.5cm x 0.5cm x 0.6cm
It will have the largest surface area: volume ratio and thus the fastest diffusion of substances to the center of the block.
B) 0.5cm x 0.5cm x 0.6cm
It will have the highest surface area to volume ratio
C) 1cm x 1cm x 1cm
It will have the highest surface area to volume ratio and thus diffusion will be fastest in this which caused the fastest color change.
D) 2
Surface area for a cube is calculates as 6.a2, where a is the length of side of each edge. Thus, a cube with 3cm X 3cm X 3cm will have a surface area of 6.32 = 54 cm2. The volume of a cube is calculated as a3. Thus, the volume of cube will be 33= 27 cm3. So the surface area to volume ratio will be 2.
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