Physics and Astronomy

Add 'Em Up
Objective Analyze two different populations using a different method in each case. Use the information to solve a problem involving both populations.
Participants Teams of up to six.

Teams will bring two non-programmable calculators and 2 to 4 metre sticks.
Two population sampling stations will be equipped as follows:
Set Up A: Wooden stakes; Cord; Metre stick.
Set Up B: Ruler; Graph paper; Pencil; Aerial photographs and/or map.


1. Each team will consist of 6 members, organized so that some members are involved at each of the two stations.
2. Possible Activities:
    A. Calculate the population densities of recognizable objects in a given area using a quadrant sampling method.
    B. Calculate the population density of a particular organism by analyzing aerial photographs, maps and graphs.
3. The event will last for 30 minutes. At the end of that time, the team must submit their work sheet showing the final answer as well as the process used to obtain their answer.


1. For each of the measurements, and the final answer to the problem, the team with the least difference between their answer and the accepted value will be awarded 100 points.
2. Each team with a greater difference will score as follows:

Team Score =

TD = Team Difference; HD = High Difference; LD = Low Difference. This formula gives 100 points to the best team, 25 points to the weakest team, and the rest score points scaled linearly between these limits.

The scores from the parts of the event will be added together to give a maximum possible score of 200 points. A further 30 marks will be awarded by the judges based on the processes involved in reaching each answer.

In London , this event was one fifth of the Grade Ten Pentathlon. The five events are:
Add 'em 'up.
Circuitous Circuits.
Cryptic Cross Word.
Metric Madness.

Source London District Science Olympics. This event was designed by Bela Nagy.

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