Diffusion

• Science
• Lower Secondary (Key Stage 3)

Diffusion

What is diffusion?

1. The movement of particles from high to low concentration
2. The movement of particles from low to high concentration
3. The movement of particles at a constant rate
4. The movement of particles in the same direction

Which factors affect the rate of diffusion?

1. Density, viscosity, and shape
2. Time, volume, and distance
3. Temperature, concentration gradient, and surface area
4. Pressure, velocity, and color

In which state of matter does diffusion occur?

1. Gases only
2. Liquids only
3. Solids only
4. Gases, liquids, and solids

What is an example of diffusion in everyday life?

1. Sugar dissolving in coffee
2. Perfume spreading in a room
3. Ice melting in water
4. Salt precipitating from a solution

How does diffusion contribute to biological processes?

1. It enables the movement of substances in and out of cells
2. It controls genetic information
3. It produces energy for cells
4. It regulates cell division

Diffusion