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...

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...

This is a short correction to the video detailing pumping 3 sodium ions and 2 potassium ions. There is also a letter from a professor giving information about the ratio of 3 to 2 ions and how the concentration gradient is actually the...

You may find this presentation helpful in setting up the classic experiment where potato wedges are used for observing the effects of osmosis. You can view the experimental setup in the text and a lab sheet in the pictures, but you will...

As an anticipatory set, biologists listen to the story of Ruth Patrick, a scientist who used algae to detect water quality. They observe a demonstration of osmosis and diffusion. In their lab groups, they place Elodea stalks in...

In this transport worksheet, students compare and contrast the characteristics and examples of active transport and passive transport. This worksheet has 1 graphic organizer and 11 short answer questions.