To better comprehend organic farming scholars conduct experiments on how plant roots remove nutrients from the soil. Through multiple activities, discussion, and instruction they relate the plant's vascular system to the human...

Watch as colored water droplets chase each other around a slide. The factor that affects the behavior is the concentration. Part of a large playlist, an experimental video provides an explanation for the behavior of the water droplets in...

Why do balloons go flat over time? The answer lies in the behavior of gases! Introduce young scientists to diffusion and effusion with a video. Pupils learn the composition and partial pressures of atmospheric gases as well as how the...

Explore the importance of a concentration gradient in the rates of dissolution. Using the ocean ecosystem, learners study rates of dissolution around coral reefs. A hands-on experiment helps individuals discover the effects of changing a...

Phew, what's that smell? And, how does something like a scent travel from its source to all corners of a room? Science sleuths learn how diffusion is responsible for spreading odors around in the sixth installment in a 14-part video...

We know that gases move throughout and out of our bodies, but why? And how? Learn about gas movement by analyzing rates of effusion. Additionally, watch an interesting precipitate reaction using gases to apply effusion, diffusion, and...

Young scientists demonstrate their understanding of cell transport on this comprehensive activity. Focusing on cellular structure and the different processes that allow materials to move into, out of, and throughout animal cells, this is...

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...

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...

Not only will beginning biologists write the answers to questions on this learning exercise, they will analyze diagrams of what happens in different situations considering cell transport. Although you will find the text a little blurry...

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...

Again, similar to the previous 3 videos on this topic, this resource references the sodium potassium pump and talks about the transmission of signals using ion gates.

Students explore osmosis using eggs. In this Biology lesson plan, students dissolve the egg shell off an egg and then use the egg membrane to show osmosis. The egg will swell or shrink depending on the type of solution it is placed in....

For this osmosis worksheet, students read about how concentration gradients control osmosis and how this affects cells. Students complete 5 short answer questions based on the reading.

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