Diffusion Review Questions

What is diffusion?

• Movement of molecules from low concentration to high concentration

• Movement of molecules from high concentration to low concentration

• Movement of molecules in a circular motion

• Movement of molecules from one state to another

Which of the following is NOT a factor affecting diffusion?

• Temperature

• Concentration gradient

• Surface area

• Color of molecules

Which process is the opposite of diffusion?

• Active transport

• Osmosis

• Filtration

• Evaporation

What is the result of diffusion?

• Unequal distribution of particles.

• Equal concentration of particles throughout.

• Increased temperature.

• Decreased pressure.

Which statement is true about the movement of particles in diffusion?

• It requires external energy.

• It stops when concentration is equal.

• It only occurs in solids.

• It increases pressure.

What does the diagram labeled "Equal Concentration" illustrate?

• Unequal distribution of particles

• Equal distribution of particles

• Increased particle movement

• Decreased particle movement

Olivia is making a cup of tea and adds sugar to it. She stirs the tea until the sugar is evenly distributed. What stops when the concentration of sugar becomes equal throughout the tea?

• Temperature change

• Particle movement

• Pressure increase

• Volume expansion

What is diffusion?

• The process of particles moving from high to low concentration.

• The process of particles moving from low to high concentration.

• The process of particles staying still.

• The process of particles forming a solid.

What is the main reason particles in gases diffuse?

• They are attracted to each other.

• They are in constant motion.

• They are heavy.

• They are large.

Which of the following best describes the motion of particles in a liquid?

• They are stationary.

• They move freely but are closer than in gases.

• They are tightly packed.

• They move in a fixed pattern.