NYS Diffusion Lab

Front

What is the initial color of starch indicator solution?

Back

Amber.

Front

What happens to a cell when a salt solution is added?

Back

The cell shrinks in size.

Front

What color does starch indicator/iodine produce if starch is present?

Back

Blue-black.

Front

What is diffusion?

Back

Diffusion is the process by which molecules spread from areas of high concentration to areas of low concentration.

Front

Which indicator tests for the presence of starch?

Back

Iodine.

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a selectively permeable membrane.

Front

What is the effect of distilled water on a cell?

Back

The cell swells as water enters.

Front

What color does Benedict's solution turn in the presence of glucose?

Back

Yellow/orange/brownish.

Front

What is the purpose of using indicators in experiments?

Back

Indicators help to identify the presence of specific substances by changing color.

Front

What is the difference between active transport and passive transport?

Back

Active transport requires energy to move substances against their concentration gradient, while passive transport does not.