Physics and Astronomy

Density Relay
Objective To determine the density of an object in the shortest time possible while traveling through an obstacle course.
Purpose To investigate the concept of density.
Participants: Teams of three or four.
  1. Each team travels through an obstacle course with three relay points where a team member is to measure one of the physical quantities required.
  2. All required measuring devices are available at each relay point.
  3. An example is to measure the density of a ping-pong ball.

  1. First member receives the ball from the judge, proceeds to Relay point 1 and determines the mass of the ball.
  2. Member number two is told verbally the mass and proceeds to Relay point 2 where the volume of the ball is measured.
  3. Member number 3 is then told verbally the mass and the volume and travels to Relay point 3 where pencil and paper is available to calculate the density.
  4. When the ball and density value is placed on the judges table, the timer will stop.
Judging Points are awarded on the basis of time taken and the accuracy of the final density value.
Source Youth Science Foundation Science Olympics Manual.

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