AP BIOLOGY

THE CELL

TRANSPORT INTO AND OUT OF THE CELL

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
In your diffusion lab you had three different beakers at hot, room, and cold temperatures. You then placed a drop of food coloring in each and recorded the changes over the next 5 minutes. Which of the following was likely conclusion?
A
Temperature does not affect diffusion rate
B
Increased temperature speeds up diffusion
C
Increased temperature slows diffusion
Explanation: 

Detailed explanation-1: -Temperature: Higher temperatures increase the energy and therefore the movement of the molecules, increasing the rate of diffusion. Lower temperatures decrease the energy of the molecules, thus decreasing the rate of diffusion. Solvent density: As the density of a solvent increases, the rate of diffusion decreases.

Detailed explanation-2: -The food coloring mixes through the hot water faster than it mixes with the cold water. This is because in hot water, the water molecules have more energy and are moving faster than the molecules of cold water. This makes it easier for the dye to get mixed throughout the hot water.

Detailed explanation-3: -Diffusion will occur more rapidly in higher temperatures than in lower temperatures. When molecules heat up, they are given more energy and will bounce around and move more rapidly. In colder temperatures, molecules slow down as there is less energy.

Detailed explanation-4: -It may take up to 20 minutes for the food-dye molecules to disperse evenly throughout the water.

There is 1 question to complete.