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Video on the Physics of Food - No ordinary yogurt

Why is set yogurt a solid, while milk is a liquid? That's because it's a gel!

Discover the magic of yogurt-making in this video

The video here is just a cut of the...

Fan or Turbine Efficiency

A practical challenge for pupils based on a Design Council finalist project carried out by a 17 year-old.

The project includes the need for the pupils to provide a full report on their work.

 

Chlorophyll fluorescence

From Solar Spark, this activity allows students to see how chlorophyll can be energised and how this causes it to fluoresce. Chlorophyll in plant leaves absorb red light and pass the energy on to other parts of the plant, hence leaves look green. But if there is nowhere for the energy to go, it gets released as...

Clock reaction

Two translucent liquids are mixed. At first, nothing happens: the resulting solution is still translucent. Suddenly, with no warning, the solution turns blue-black all at once.

Curriculum links include redox reactions, rate of reaction, kinetics

Cracking Hydrocarbons

In this classic experiment, from the Royal Society of Chemistry, students heat a large molecule with a catalyst and collect the gas produced. The gas produced is tested with bromine water for the presence of a double bond. The resource is set out as teachers' notes followed by the students' page which presents the...

Leaking bag

This mystery can be used to introduce osmosis and diffusion. 

Two beakers are displayed at the front of the room. Both look identical in that they both contain a plastic zip--lock bag with a starch solution inside. The zip-lock bags are both sitting in a clear solution. What the students don’t know is that...

Gelli baff

Gelli Baff, a crystalline powder, has been dumped into a bathtub filled with water. How can you force the hydrogel to go down the plughole in order to drain the bathtub? 

In this investigation, students learn about swelling reactions, balanced reactions, and polymerisation. Students should be able to...

Disappearing lab report

This mystery deals with a laboratory report in which the written results suddenly vanished. The students need to find out how the writing vanished,  how to recover the vanished data, and what the secret of the pen is.

Curriculum links include Energy (exothermic and endothermic reactions), chemical...

Murder of the jeweller

The mystery revolves round a detective story which the students gradually solve. A jeweller has been murdered: the suspects are his metal suppliers but the motive and the culprit are initially unknown.

Students have samples of the various metals with which the jeweller worked. They find out the metals’...

Sea sand overseas

The mystery deals with sand that stays dry when water is poured onto it. Students are requested to find ways to build sand castles with this 'dry' sand.

Curriculum links include:  Chemical bonding, hydrophobic and hydrophilic interactions and compounds
 

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