ITSI+Activity+-+Describing+Motion

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= Activity Description: ITSI Activity: Describing Motion =

Include information about the activity's source or a link to the or Lesson Plan: [|Describing Motion]

Brief Description
In this online investigation, students use a motion detector to predict and the observe the appearance of distance (actually position) vs time graphs for simple walks in front of a motion sensor.

GSEs Addressed
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Detailed Analysis
or be able to do as a result? || away from a motion sensor || Answers questions: How close to the motion sensor does the student start? When does the person move forward?. || How to determine start position and time from position vs time graph. (Graphs in activities are actually labeled Distance vs Time) || motion sensor output (graph is actually missing in review version). || Observe the following graph made by a motion sensor. How can you tell from the graph that the motion is repeated? How long does it take to repeat the motion? Write your answer below, in seconds.
 * ~ What does the student do? ||~ What does the student think about? ||~ What is the student supposed to understand
 * Observe a motion graph of a person walking
 * Observe a graph of periodic motion apparently from

Think about the motion of a Slinky when you release one end and allow it to drop to the ground. The loose end of the Slinky drops and then bounces back. In fact, the Slinky will continue to move up and down in a repeated pattern for some time. Describe another object’s motion that might produce a wave-like repeated pattern of motion. || Relate graph appearance to a particular type of motion. Determine period of oscillation give a graph.

Associate other examples of periodic motion ||
 * Predict appearance of distance vs time graph for a specified out and back trip by drawing a line on a "Prediction Graph." || Does your prediction show a change in speed? Explain the motion in words. || Associate the appearance of the motion graph with its a description of motion.

Determine if graph displays a change in speed. ||
 * Use motion detector to record the motion previously predicted:

With your back to the motion sensor, reproduce your Prediction drawing of a distance-time graph by walking forward and backwards over a 4-meter track in a 30-second period of time. ||  ||   || 1. How did the actual motion compare to your predictions in Collect Data 1? Explain any differences.
 * Using the Prediction graph above, draw a distance-time graph that shows someone walking quickly forwards for the first half of the track and then slowly for the second half. The elapsed time of the total motion should be 30 seconds. || Label your graph to show when you walk quickly (q) and when you walk slowly (s). || Use knowledge of motion graphs to predict an out-fast back-slow trip. ||
 * With your back to the motion sensor, reproduce your Prediction drawing of a distance-time graph by walking quickly forwards for the first half of the track and then slowly for the second half. ||  ||   ||
 * || Analysis

2. How did the actual motion compare to your predictions in Collect Data 2? Explain any differences.

3. What did you learn about motion in relationship to the movement of your body? || Compare predictions with actual motion graphs, explaining any differences.

Relate new knowledge of motion with body movement. ||
 * Work with your group to create a motion graph of your own using the motion sensor. You could include a change in direction, a different starting position, and different speeds. || Write down the method that you used to make the graph. || Describe a more complicated motion from a motion graph. ||
 * Have another group try to reproduce your graph from the written description on the same graph. || Compare the graphs between the two groups. || Relate written descriptions of motion with their motion graphs. ||

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