Diffusion and Osmosis Concepts

Diffusion and Osmosis Concepts

Assessment

Interactive Video

Created by

Ethan Morris

Biology, Science

9th - 12th Grade

1 plays

Medium

Mr. Anderson guides students through AP Biology Lab 1, focusing on diffusion and osmosis. The video explains diffusion as the movement of molecules from high to low concentration and osmosis as the movement of water across a semi-permeable membrane. The diffusion lab uses dialysis tubing to demonstrate molecule movement, while the osmosis lab involves placing potato cores in various sugar concentrations to observe mass changes. The video emphasizes understanding these processes through practical experiments.

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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the two main topics covered in the AP Biology Lab walkthrough?

Diffusion and Osmosis

Photosynthesis and Respiration

Genetics and Evolution

Cell Division and Growth

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the diffusion example with a jar, what happens to the sugar molecules over time?

They remain on one side of the membrane.

They move to create an unequal concentration.

They migrate to achieve equal concentration on both sides.

They dissolve completely in the water.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary difference between diffusion and osmosis?

Diffusion requires energy, while osmosis does not.

Diffusion involves only gases, while osmosis involves liquids.

Diffusion occurs in solids, while osmosis occurs in gases.

Diffusion is the movement of solutes, while osmosis is the movement of water.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the osmosis example, why do sugar molecules not move across the semi-permeable membrane?

They are too large to pass through the membrane.

They dissolve in water before moving.

They are repelled by the membrane.

They are already in equilibrium.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of using dialysis tubing in the diffusion lab?

To contain the starch solution

To measure the rate of osmosis

To act as a semi-permeable membrane

To simulate a cell wall

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What indicates the presence of starch in the diffusion lab setup?

A red color change

A green color change

A blue color change

A yellow color change

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the potato lab, what happens to the mass of potatoes in distilled water?

The mass decreases

The mass increases

The mass fluctuates

The mass remains the same

8.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why do potatoes lose mass in high sugar concentration solutions?

Sugar enters the potato

Water moves out of the potato

Sugar leaves the potato

Water moves into the potato

9.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the significance of the point where the best fit line crosses the axis in the potato lab?

It indicates the initial mass of the potato.

It shows the final mass of the potato.

It represents the molarity of the potato.

It marks the time taken for osmosis.

10.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main goal of the potato lab experiment?

To measure the rate of diffusion

To test the permeability of potato skin

To determine the sugar content in potatoes

To observe osmosis and changes in potato mass

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