Chameleon bubbles are formed when a sodium alginate solution is dropped into a calcium chloride solution.  The bubbles are filled by an acid‐base indicator solution; so, adding the beads to acids or bases leads to colour changes inside the bubbles by diffusion and pH change. Students can learn about acids, bases,...

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...

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...

A Year 11 module from the Salters Key Stage Four double award science course. This module introduces ideas about how living organisms control their internal environment and respond to changes in their external environment. Students are reminded that few living things...

The enzyme lactase is widely used in the dairy industry to convert the naturally occurring disaccharide sugar lactose into glucose and galactose. In this practical students investigate the treatment of milk with lactase. Following treatment they test the glucose content of the converted milk, and compare products...

As the number of cells in a microbial culture increases, turbidity increases. In this experiment students calculate doubling time and growth rate constant using absorbance as the measure of growth. Turbidity is caused by suspended cells in the growth medium scattering light, and may be measured using a colorimeter...

This experiment is a continuation of Determining Doubling Time. Students create a standard curve of absorbance against yeast concentration, and use this to determine the concentration of yeast produced over time.

The standard curve (dry mass, grams per litre) is generated from known concentrations of dried...

A Year 11 module from the Salters’ Key Stage Four double award science course. The module begins by considering variation within humans and in other species and how this could arise. The gene theory of inheritance is then studied, and finally the structure and function...

A unit taken from the Pupil Researcher Initiative (PRI) 'Ideas and Evidence' resource pack and a good resource guide. Part of the ASE SYCD: Science Year Can we; Should we? collection.

The PRI unit is a one hour lesson focusing on the MMR vaccine, teaching ideas and evidence at Key Stage Four-how the media...

This range of practical activities and resources provided by ASE is aimed to teach about plants and flowers in schools.Growing fast plants can provide rewarding results in a short time span and the ideas encourage all students to be involved with the activities....

A Year Ten module from the Salters’ double award science course. A text activity on world food supplies introduces a series of experiments on photosynthesis and the role of chlorophyll. Experiments on the effects of nutrient deficiency leads to consideration of the use...

This teaching resource examines the role of science and technology in preserving food as an important part of global food security. It considers the scale of food spoilage across the globe and the consequences of this for people and their diets. Students investigate simple ways of preserving food relating their...

Fruit juice companies use a variety of different treatments and enzymes to maximise their yield. In this experiment students will investigate the effectiveness of these different enzymes.

The enzymes used are designed...

In this experiment students grow yeast on agar plates and look at the effect on growth of some common anti-fungal treatments, which are available to treat conditions such athlete's foot and thrush. Antifungal products may be bought from a local pharmacist, for example, Canistan, Daktarin, Diflucan. Several...

This Salters’ Science extension module for biology deals with the breeding, cultivation and harvesting of plants as crops. Experiments on soil structure and nutrient content are matched with data about major crops to show why different crops require different conditions...