Understanding Diffusion

This video tutorial explains the concept of diffusion, which is the net movement of particles from an area of higher concentration to an area of lower concentration. It covers how diffusion occurs in gases and liquids, such as perfume spreading in a room or food coloring in water. The video also discusses diffusion through cell membranes, highlighting that only small molecules can pass through. Additionally, it outlines three factors affecting diffusion rate: concentration gradient, temperature, and surface area. The video concludes with a call to action to share and subscribe.

What is the primary characteristic of diffusion?

• Movement from low to high concentration

• Movement from high to low concentration

• Movement in a circular pattern

• Movement that requires energy

What happens to particles in a solution when diffusion occurs?

• They clump together

• They spread out evenly

• They remain stationary

• They move to a higher concentration area

What is the term used to describe the movement of particles as a group?

• Net movement

• Individual movement

• Random movement

• Collective movement

Which of the following is an example of diffusion in gases?

• Perfume scent spreading in a room

• Ice melting in water

• Salt dissolving in water

• A balloon deflating

What type of molecules can typically diffuse through a cell membrane?

• Large proteins

• Starch molecules

• Small molecules like water and glucose

• Complex carbohydrates

Why is diffusion considered a passive process?

• It requires energy from the cell

• It occurs only in the presence of light

• It happens due to random particle movement

• It needs a catalyst to occur

How does a larger concentration gradient affect diffusion?

• It reverses the direction of diffusion

• It increases the rate of diffusion

• It has no effect on diffusion

• It slows down the rate of diffusion

What effect does temperature have on the rate of diffusion?

• Temperature has no effect

• Higher temperature increases the rate

• Higher temperature decreases the rate

• Lower temperature increases the rate

Which factor increases the rate of diffusion by allowing more particles to diffuse at once?

• Temperature

• Pressure

• Surface area

• Concentration gradient

Which of the following is NOT a factor affecting the rate of diffusion?

• Concentration gradient

• Temperature

• Surface area

• Color of the particles