Sheet 5 - Measurement & Control first pageprevious page

A data-logging device is being used to investigate the effect of sunlight on the photosynthesis of oxygen by a water plant. The water is maintained at a constant temperature throughout the experiment.

  1. Name the two different devices, labelled A and B, that are attached to the data-logger.
  2. The experiment is to be left for one week, suggest a time interval for measurements to be recorded.
  3. During the experiment the data-logging device is not attached to a computer. What does it do?
  4. Name the device labelled C.
  5. Explain how feedback from C is used to maintain the experiment at a constant temperature.
  6. After one week the data-logging device is attached to a desktop computer and the data transferred to a spreadsheet program. Suggest how the results might be displayed.
  7. State two reasons why it is better to perform this investigation in this way, rather than by hand.

Page last updated 23/05/2003 Copyright, I.D.Lee, Didcot Girls' School.
All rights reserved. The original material provided on this site may not be copied or redistributed without written consent from the school. But please feel free to add a link to this page on your own website if you find it useful.

first pageprevious pagetop of page