Listing all results (311)

Fungal Inhibition

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.

...

Determining Doubling Time

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...

Determining Dry Weight

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...

Solar Power for Exploration Challenge

From NASA, Solar Energy for Space Exploration is a problem-based learning activity. The project requires students to propose and defend a design to provide power to a lunar or Martian research base for six astronauts. To prepare for the final project, students investigate the variables that affect the operation of...

Space-based Astronomy Educator Guide

These resources from NASA look at why telescopes are put into space. Students build simple spectroscopes and telescopes to learn the answer to this question. This educator guide is divided into units of study that include science demonstrations, lesson plans and student sheets so that students may learn about Earth...

Episode 538: Electron Scattering

In this learning episode, from the Institute of Physics, students follow work on Rutherford scattering to look at diffraction graphs and calculate nuclear diameters.

The activities include:
* student experiment using an optical analogue to show diffraction around spherical objects
* diffraction...

Episode 539: Deep Inelastic Scattering

In this learning episode, from the Institute of Physics, students use an analogue experiment to illustrate electron scattering by quarks. In the model, magnets are concealed in a box. Their poles represent ‘charges’ which are probed using a freely-suspended magnet. This helps to demonstrate that each of the...

Episode 510: Properties of Radiations

In this learning episode from the Institute of Physics, the properties of ionizing radiation are introduced through a consideration of safety.

Students consider the ionising property of different radiations in relation to how this makes them dangerous to living things. They see that radiation with...

Episode 511: Absorption Experiments

In this learning episode, from the Institute of Physics, students investigate the absorption of radiation and how this can be illustrated experimentally. The investigations look at sources of alpha and beta radiation. A model, looking at the absorption of light as it passes through successive microscope slides, is...

Episode 607: Specific Heat Capacity

This learning episode, from the Institute of Physics, guide students to measure specific heat capacities experimentally and then see how energy must be supplied (or rejected) to increase (or decrease) the temperature of a material. Calculations are used to quantify the processes.

The activities look at:...

Pages

View all publishers