Pressure CONVERSIONS
1st Study and Take Notes on the material below
2nd After taking notes, complete the Quick Check Questions.
3rd Refer to Textbook pages 204 for Reference
4th Screenshot your name + score to the Google Classroom when finish
DIFFUSION & CONCENTRATION GRADIENTS
Diffusion is when tiny particles move from an area where there are many particles (high concentration) to an area where there are fewer particles (low concentration).
This movement happens naturally and does NOT need outside energy.
Simple definition:
Particles spread out from crowded areas to less crowded areas.
All particles are in constant random motion.
- Gas particles move very fast.
- Liquid particles move slower but still move.
- Even solids vibrate slightly.
This idea connects to Kinetic Molecular Theory.
Food coloring in water: The color spreads out evenly.
Perfume in a room: The smell spreads through the air.
Oxygen in your body: Oxygen moves from lungs to blood.
Smoke in air: Smoke spreads away from its source.
A concentration gradient is the difference between high and low concentration.
Diffusion moves High → Low.
Diffusion continues until particles are evenly spread out.
This state is called equilibrium.
- Particles still move.
- No overall change in concentration.
Diffusion is passive transport.
It does NOT require energy.
- Define diffusion.
- Explain why it happens.
- What is equilibrium?
- Give a real-life example.