A collection of videos and experiments that are suitable for Biology.
2.14 Turgid Plant Cells
Understand the importance in plants of turgid cells as a means of support
2.15 Factors affecting the rate of diffusion
Understand the factors that affect the rate of movement of substances into and out of cells - to include the effects of surface area to volume ratio, temperature and concentration gradient.
2.15a Surface area and diffusion
Understand the factors that affect the rate of movement of substances into and out of cells - to include the effects of surface area to volume ratio, temperature and concentration gradient.
2.15b Temperature and diffusion
Understand the factors that affect the rate of movement of substances into and out of cells - to include the effects of surface area to volume ratio, temperature and concentration gradient.
2.15c Concentration gradients and cells
Understand the factors that affect the rate of movement of substances into and out of cells - to include the effects of surface area to volume ratio, temperature and concentration gradient.
Try out our new and fun Fraction Concoction Game.
Add and subtract fractions to make exciting fraction concoctions following a recipe. There are four levels of difficulty: Easy, medium, hard and insane. Practice the basics of fraction addition and subtraction or challenge yourself with the insane level.
We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.