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Mystery of Gibraltar

Students learn about the solutions of a particular substance which...

Red or blue flowers?

Students investigate transport in plants by seeing what happens when flowers are placed in different coloured solutions.

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...

Eating nails

In this investigation, students extract iron from a breakfast cereal and consider how our bodies are able to digest iron by looking at its reactions with hydrochloric acid.

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...

Grit on the streets

In the context of finding out why we grit roads in winter, students are shown what happens when salt is sprinkled onto ice lollies.  They are then asked If they believe that the temperature of the ice lolly with the salt will increase or decrease, causing it to melt faster. Students then investigate some...

Mysterious eggs

In this mystery, students make a hypothesis based on the old saying that a rotten egg floats when put in fresh water, and fresh eggs sink.   This is a good investigation to discuss margin of error and the validity of the results.

Curriculum links include density, Archimedes, buoyancy.

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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