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DIFFUSION AND OSMOSIS
Objective: I will apply my knowledge of osmosis and diffusion to explain my lab observations.
Drill:What do you think happens to a drop of food coloring when it is added to water and no one stirs it?
Brain POP
http://www.brainpop.com/science/matterandchemistry/diffusion/preview.weml
Diffusion
Particles moving from an area of high concentration to an area of low concentration.
Homeostasis
How our body stays balanced.
How does diffusion help us maintain homeostasis? Sugar/nutrients move into the cell
Removes waste out of the cell
Concentration Gradient
Particles moving from an area of high concentration to an area of low concentration.
Selectively Permeable
Small molecules can move through the membrane large particles cannot.
Osmosis
WATER moving through a cell membrane from an area of high concentration to an area of low concentration.
Passive Transport
Does not require energy for particles to move across a cell membrane.
Active Transport
When cells use ATP energy to move molecules across a membrane.
Active Vs. Passive Transport
Which picture shows active transport?
Solution Types
Stations
Using your notes complete the 5 station activities.
The stations are not in order You will have 8 minutes at each station Do not move until the buzzer sounds!