Diffusion and Osmosis Baggie Lab

Front

What is diffusion?

Back

Diffusion is the process by which molecules move from an area of high concentration to an area of low concentration until they are evenly distributed.

Front

What is osmosis?

Back

Osmosis is the movement of water molecules through a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What does selectively-permeable mean?

Back

Selectively-permeable means that a membrane allows certain substances to pass through while blocking others.

Front

Where does water move during osmosis?

Back

Water moves from an area of high concentration of water (low solute concentration) to an area of low concentration of water (high solute concentration).

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, water moves out of the cell, causing it to shrink.

Front

What happens to a cell in a hypotonic solution?

Back

In a hypotonic solution, water moves into the cell, causing it to swell and potentially burst.

Front

What is the role of the iodine indicator in the baggie lab?

Back

The iodine indicator is used to test for the presence of starch; it turns purple-black in the presence of starch.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in concentration of a substance across a space.

Front

What is the outcome when dye is added to water?

Back

The dye will diffuse from an area of high concentration (where it was added) to areas of low concentration until evenly distributed.

Front

What is the significance of the baggie in the lab experiment?

Back

The baggie acts as a selectively permeable membrane, allowing certain substances to pass while blocking others.