What is Diffusion?
In which states of matter can diffusion happen?
Solids, liquids, and gases.
What is diffusion?
The net movement of particles from high to low concentration.
What is a selectively permeable membrane?
A membrane that lets some things through but not others.
How do plants get carbon dioxide for photosynthesis?
Carbon dioxide diffuses into the leaves through small openings called stomata.
What are particles?
Tiny pieces that make up substances
What can make diffusion happen faster?
Higher temperatures.
Do particles move randomly?
Yes
What does net movement mean?
The overall movement in one direction.
How does diffusion help our stomachs digest food?
Nutrients from digested food move into the blood by diffusion.
Name one thing you should keep the same in the tea experiment.
The amount of water, the tea bag, or the time allowed.
What does diffusion make happen in a solution?
Particles mix evenly throughout the solution.
What does concentration mean?
How many particles are in a certain space
When the tea is evenly spread, does diffusion stop completely?
No, particles still move randomly, but there is no net movement in one direction.
How does a teabag in hot water show diffusion?
Tea spreads from the bag into the water by diffusion.
What happens to food coloring in a glass of water?
It spreads out evenly through the water by diffusion.
Why does diffusion happen?
Because particles move around and spread out naturally.
What could you change to make a fair test comparing hot and cold water?
Change only the water temperature.
Why does the tea spread without stirring?
The particles move randomly and diffuse.
How does the smell of cookies spread in a house?
The smell spreads through the air by diffusion.
Explain why the tea eventually spreads throughout the water.
Tea particles move from an area of high concentration to an area of low concentration by diffusion.