Summary of activity:
In order to pull in as many families as possible who might not normally attend an event presented purely as a science fair, this event was combined with an arena showcasing children involved in basketball, gymnastics, table tennis and karate and with opportunities for children to test themselves against 15 world records in everything from crab walking to balancing spoons on their faces. The world record activities all also included simple measurements – for example timing and counting – and children were encouraged to discuss the ‘rules’ needed in order to define a record.
Specific measurement technology activities were as follows:
Standing long jump – measured and compared both as raw measurements and standardised relative to body length. Results were compared both to other participants and to various animal record holders.
Balance boards with automatic timing were created. Participants were encouraged to think about the issue of precision vs resolution in the light of the fact that the timing software only scanned every 10ms.
Who is the strongest? – Participants competed to hold their arms out straight against the pull of an exercise elastic (and were encouraged to think about how to make this a fair test for taller and shorter people). Participants also measured their grip strength using hand grip dynamometers and were encouraged to think about the shortcomings of the design used and how it might be improved.
Measuring challenge 2m – Participants measured outwards from a central circle using various techniques (hands, tape measures, meter rules, ultrasonic device) and deposited a colour coded counter at what they thought was the 2m point. The pattern of counters was used to stimulate discussion of the meaning of ‘accuracy’ and ‘precision’.
Measuring challenge 50m – Participants measured 50m from a starting line using various techniques (paces meter rules, surveyor’s wheels) and deposited a colour coded counter at what they thought was the 50m point. The pattern of counters was used to stimulate discussion of the meaning of ‘accuracy’ and ‘precision’.
Measuring challenge ‘tiny’ – Participants worked in pairs to measure a number of small test pieces using tape measures, rulers and vernier gauges. Each member of the pair wrote down their results independently and partners with matching results were offered reward stickers. This was used to initiate a discussion about how repeatable a measurement is.
Home advantage – An orienteering grid course was set up and timed electronically using equipment loaned by our local orienteering club. Participants were encouraged to do the course twice and compare their first and second times. They were then encouraged to think about how home advantage might affect results in a variety of sports.
Do you have to be so loud? – Participants were given the opportunity to use appropriate measuring equipment to find out how loudly they could shout (decibel meter), what their sound waves looked like (oscilloscope) and what the world sounds like to a bat (frequency shift bat detector)
GPS tracking – Participants took a GPS tracking device for a walk round the school grounds and then displayed their route on a map and observed the fluctuations resulting from the 10m accuracy of the device. A demonstration of how GPS positioning works was also offered (using strings to represent signal paths from satellites).
The need for speed 3 – Participants took it in turn to drive radio controlled cars round an automatically timed loop and to time the loop using a stop watch. Differences in recorded times were calculated and the spread of results discussed / displayed on a chart.
Make your own sand timer – Participants made their own timers using cassette cases, plasticine and salt and then challenged each other to estimate how long the timers would take to run.
Make your own pendulum – Participants made their own pendulum out of plasticine and string and competed to time 30 seconds as accurately as possible.
The need for speed 2 – Participants used a speed gun to measure their running speed a number of times and discussed the ‘outlier’ measurements caused when the speed gun picked up arm or leg movements rather than overall running speed.
Have your beanbag throw measured professionally – A local surveying firm very kindly provided equipment and expertise to measure children’s bean bag throws using the same type of laser measuring equipment that they will see in use for measuring javelin throws at the Olympics.