Biosphere

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This resource contains activities based around the concept of astronauts living in space. It is intended that students try out all the activities before producing a specification for their biosphere.

*Breathing: this activity describes how one can use simple equipment to measure the volume of air breathed at rest.

*Exercise: this worksheet requires students to interpret data from a graph showing the effects of exercise on oxygen demand.

*Improving photosynthesis: In this activity, students must plan an investigation into the rates of photosynthesis with variables of temperature, light level, colour of light and carbon dioxide levels.

*Biosphere specification: students must produce a design for a self-sustaining life support unit.

*Photosynthesis and respiration: students carry out a series of investigations to explore the effects of light levels on the carbon dioxide concentration in a sealed tube containing Canadian pond weed and pond snails.

*Respiration: this worksheet asks questions on the process of respiration. Question 6 requires the results from the investigation carried out in the breathing activity.

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Please be aware that resources have been published on the website in the form that they were originally supplied. This means that procedures reflect general practice and standards applicable at the time resources were produced and cannot be assumed to be acceptable today. Website users are fully responsible for ensuring that any activity, including practical work, which they carry out is in accordance with current regulations related to health and safety and that an appropriate risk assessment has been carried out.

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