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

Botanic Gardens Conservation International (BGCI) resources look at the effects of climate change.This activity encourages students to make observations, record data and be aware of the links between weather and trees Students work with their peers to collect data using drawings or photographs. They also make notes...

This resource is a full investigation with additional activities using a variety of multi-sensory approaches where students are experimenting to make the best protective sea wall.

These are activities on the theme of...

This resource, from the Association for Science Education (ASE) is a Key Stage Four investigation into kinetic and potential energy, based on a real-life context. If a large asteroid hit the Earth, could it cause a global catastrophe? In this unit, on a table-top scale, students simulate what an impact would be...

Produced by Science & Plants for Schools (SAPS), these investigations look at how pigments change during the fruit ripening process.

The green colour of the unripe fruit is due largely to the presence of...

From Solar Spark, this simple demonstration shows the effect of adding colours. Photos and pictures are often made up from just four colours black, cyan, magenta and yellow. Different amounts of each colour combine to get all the colours of the rainbow and make the complete picture.

Solar cells are...

This booklet is part of the ‘Innovations in Practical Work’ series published by the Gatsby Science Enhancement Programme (SEP). It is based on two specially developed resources produced by SEP: the Optical Signal Transmission Set and the Analogue/Digital Transmission...

In this activity, students plan an investigation to compare two clinical thermometers or two blood pressure devises.   They will need to investigate:

• the key features needed by a clinical thermometer or blood pressure monitor. The generic features required by physiological measuring devices are...

Produced by Science & Plants for Schools (SAPS), this activity enables students to investigate the effect of competitive and non-competitive inhibitors on the enzyme beta-galactosidase.

The chemical ONPG (o-nitrophenyl beta-D-galactopyranoside) is degraded by the enzyme beta-galactosidase. The product is...

This booklet is part of the ‘Innovations in Practical Work’ series published by the Gatsby Science Enhancement Programme (SEP). Composites are made by physically combining two or more materials. Many composite materials are used to provide strength and rigidity while using thinner, lighter components. However, they...

This sheet provides an overview of what happens during the composting process, thinking about the microorganisms involved in the decomposition of plant material. It offers ideas for monitoring temperature change within a compost heap over time and information on how to start your own compost heap.

Produced...

Produced by Solar Spark, this activity allows students to see a condensation polymerisation reaction in action as the polyamide polymer, Nylon, is produced. This is a condensation polymer made of two parent monomers, a di-amine and a di-acid chloride.

The reaction can be used to illustrate:
*...

This video is the full experiment in real time to investigate the rate of conduction in various metals.

This video demonstrates a convection experiment for GCSE Physics using potassium permanganate in water with a Bunsen burner.