Tag Archives: diffusion

7G Particle Model of Solids, Liquids & Gases

Solids, liquids and gases from Kesh Dewan

States of Matter, a 3m video from The Fuse School:

KS3 Bitesize higher level – The Particle Model – a 13m video covering States of Matter, Change of State, Gas Pressure & Diffusion:

A 20m 24s video on Solids, Liquids, Gases from Scientific Eye:

Science in Action – States of Matter a 19m 10s video. Scientific EyeChanging State (18m 30s); States of Matter (Curriculum Bites – Wan2tlkScience?), a 9m video.

Liquids that can act like solids – impossible. Or is it? Can you walk on water? (non-Newtonian fluid pool) and Brainiac Science Abuse – John Tickle walks on custard.

Superfluids: superfluid helium and Ben Miller experiments with superfluid helium.

1.4 Membrane Transport

BioKnowledgy 1.4 Membrane transport from Chris Paine (at Dulwich College Shangai) – taken from his fabulous blog BioKnowledgy.

1.4 Membrane Transport notes to complete (created by Ms Green).

A 13m 35s video lesson from Dan Rott:

Some assessment statements are covered in videos by Stephanie Castle.

Click on ‘Cellular Transport’ to see an interactive animation from Wiley that covers diffusion, osmosis, passive transport & active transport. Or here for an animated, narrated tutorial on how molecules move across the cell membrane (from Sinauer Associates).


A short, simple animation demonstrating diffusion (from St Olaf) and here are two fantastic animated, narrated tutorials from McGraw Hill Education – how diffusion works & diffusion through cell membranes.


Short, simple animations demonstrating facilitated diffusion with a channel protein and with carrier proteins – three types: uniport, symport, & antiport  (from St Olaf).

An animated, narrated tutorial on the three types of carrier proteins (from Sinauer Associates).

Or here are is a fantastic animated, narrated tutorial from McGraw Hill Education – how facilitated diffusion works.


A short, simple animation demonstrating osmosis (from St Olaf) or here are two fantastic animated, narrated tutorials from McGraw Hill Education – osmosis & how osmosis works.


A short, simple animation demonstrating Secondary Active Transport – the Na/K pump coupled with the glucose/Na symport (from St Olaf).


A short, simple animation demonstrating phagocytosis (from St Olaf) or here is a fantastic animated, narrated tutorial from McGraw Hill Education – Endocytosis & Exocytosis – which includes a quiz.

And here is an animated, narrated tutorial on vesicle budding &  fusing which also includes a quiz (from Sinauer Associates).

Here Paul Andersen gives you a brief introduction to The Cell Membrane.

Mr W’s Cell Membranes rap is good revision as is his Osmosis! rap.

In Crash Course Biology #5 – In Da Club – Membranes & Transport, Hank describes how cells regulate their contents and communicate with one another via mechanisms within the cell membrane.

B2 Cells

All of B2 Revision notes in downloadable word format and here are the key terms and definitions: Key terms B2

GCSE Bitesize – Cell Activity – covers animal & plant cells, movement in & out of cells & cell division (18m). Science in Focus – Cell Biology – a 19m video.

How about seeing some real cells in action? Here is a Trachelius ciliate feeding on a Campanella ciliate, and here is a Paramecium feeding:

For self-assessment questions, with exercises and discussions, just click on the correct topic at Biology GCSE & IGCSE Question Bank. Powerpoints can be downloaded from the same site here. The s-cool revision site lets you revise the topic, summarizes the topic & tests you on it. Skoool gives you a lesson, including progress questions, for each Biology topic but you’ll need sound on for it. 



Just click to enlarge (thank you LadyofHats).

Solids, Liquids & Gases

Some information on solids, liquids and gases (including a decent animation) can be found here. And this is a video on States of Matter from The Virtual School:

Science Bank 4 (Motion of Particles): Part 1 – Brownian motion (to 4m 45s); Part 2 – diffusion (to 9m 45s); Part 3 – changes of state (to 14m 15s):

IGCSE Chemistry: Topic 1 part 1 Particulate Nature of Matter  (6m 30s) & part 2 Diffusion (5m 35s), lessons by Sal Sciab.

Not on the syllabus, but interesting: the invisible motion of still objects:

B2.2 Movement into & out of cells

Ks4 movement in and out of cells from SUSAN MATHEW

Mr Andersen (from Bozeman High) gives a brief description of osmosis:

And here he talks us through an osmosis practical.

GCSE Bitesize – Diffusion & Osmosis – a 4m 24s video and Bitesize Top 20 Demos – Osmosis (3m 44s).

B2.2 Revision notes in downloadable word format.

Mr W’s Osmosis! rap:

And here’s a long powerpoint:


IGCSE Biology: Coursebook, chapter 2, pp.13 – 17 & chapter 3, pp.20 – 28

Here is another presentation, covering the effect of osmosis on cells: