The Semipermeable Membrane

Students examine why diffusion and osmosis happen in an egg cell.  In this diffusion activity students demonstrate a semi permeable membrane.

Use salmon eggs as a cell model for demonstrating the movement of water over concentration gradients. Junior scientists examine the same process microscopically with an onion cell. They use a thistle tube and a semipermeable membrane to...

In this elements and compounds worksheet, students review the physical properties of different compounds and elements using websites for information. This worksheet has 1 graphic organizer and 1 short answer question.

What drives the ocean's motion? Get your class moving toward understanding by using this video. Viewers find that thermohaline circulation is caused by the concentration gradients of temperature and salinity. Using adorable animation in...

Teach your class how to get out of a cell — or break in. The third installment in a seven-part series introduces the class to cell membranes and their functions. The lesson plan includes information to present to the class,...

The constant motion of our oceans represents a vast and complicated system involving many different drivers. Sasha Wright explains the physics behind one of those drivers- the concentration gradient- and illustrates how our oceans are...

In this homeostasis and the plasma membrane worksheet, students complete a flow chart and 5 questions related to homeostasis and the plasma membrane. They complete a flow chart that illustrates the plasma membrane and cellular transport....

Don't you wish you could absorb knowledge through osmosis? The video begins by defining osmosis, explores how water flows from a hypotonic to a hypertonic concentration, reaching an isotonic level. Learners then see a demonstration of...

This definition and explanation osmosis shows how water diffuses from regions where it is in high concentration to regions where it is in low concentration.

View this simulation to observe the process of smaller particles moving through a semipermeable membrane. Temperature is adjustable. [Must download the simulation to engage in the activity]