Osmosis and Diffusion Practice

Front

What is osmosis?

Back

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

Front

What is diffusion?

Back

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

Front

What is a semi-permeable membrane?

Back

A semi-permeable membrane is a barrier that allows certain substances to pass through while blocking others.

Front

What is the main substance that moves during osmosis?

Back

Water.

Front

What is active transport?

Back

Active transport is the movement of particles across a membrane against a concentration gradient, requiring energy.

Front

What do cells need for active transport?

Back

Cells need energy (usually in the form of ATP) to transport particles by active transport.

Front

Where does diffusion occur?

Back

Diffusion occurs in gases, liquids, and across membranes.

Front

What happens to perfume in a room over time?

Back

The perfume molecules diffuse from an area of high concentration (near the bottle) to areas of lower concentration (throughout the room).

Front

What is concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance between two areas.

Front

What is the effect of temperature on diffusion?

Back

Higher temperatures increase the energy of molecules, leading to faster diffusion.