Exploring Osmosis Through Potato Strip Experiments

Jessica Bakan presents a study on the effect of salt concentrations on potato strips' length. The study aims to observe changes in potato strips when immersed in distilled water and various saline solutions, explaining osmosis. The independent variable is the solution type, while the dependent variable is the potato strip length. The study hypothesizes that potato strips will change length based on the solution, with distilled water increasing length and higher saline solutions decreasing it. The experiment confirms these predictions, demonstrating osmosis as water moves across semi-permeable membranes. The study concludes that osmosis causes these changes, with hypertonic solutions leading to flacidity.

What is the main objective of the study presented by Jessica Bakan?

• To study the growth rate of potato plants in saline water

• To measure the weight of potato strips in various solutions

• To determine the change in length of potato strips when immersed in different solutions

• To determine the effect of salt concentrations on the color of potato strips

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which of the following is the independent variable in the experiment?

• The type of container

• The length of the potato strip

• The type of solution the potato is immersed in

• The amount of solution used

What is the alternative hypothesis of the experiment?

• There is no change in the length of the potato strips when immersed in varying solutions

• The length of the potato strips will increase in all solutions

• There is a change in the lengths of the potato strips when immersed in varying solutions

• The potato strips will turn yellow in all solutions

Tags

NGSS.MS-LS2-1

According to the prediction, what will happen to the length of the potato strip in the highest salt concentration?

• It will increase the most

• It will stay the same

• It will decrease the most

• It will turn yellow

Tags

NGSS.MS-LS1-5

Why does the length of the potato strip in distilled water increase?

• Because distilled water is neutral

• Because distilled water has a higher salt concentration

• Because distilled water is a hypotonic solution

• Because distilled water is a hypertonic solution

How many potato strips are used in the experiment?

• 6

• 9

• 12

• 15

For how long are the potato strips kept in the solutions?

• 40 minutes

• 30 minutes

• 20 minutes

• 10 minutes

What was observed about the potato strips in the 6.8% saline solution?

• They increased in length the most

• They turned green

• They decreased in length the most

• They stayed the same length

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

What caused the flaccidity of the potato strips in the saline solutions?

• Plasmolysis due to the hypotonic solution

• Plasmolysis due to the hypertonic solution

• Increase in water content

• Decrease in salt concentration

Tags

NGSS.MS-LS1-5

What is the main reason for the changes in the length of the potato strips?

• Differences in temperature

• Differences in light exposure

• Differences in solute concentrations and osmosis

• Differences in air pressure