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!