Teacher Choice Bouncing Ball Pendulum Liquid Assets.

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Presentation transcript:

Teacher Choice Bouncing Ball Pendulum Liquid Assets

Measuring Measurement can be made in standard or metric. Students will quickly see that metric measurement make calculations and graphing much easier.

Bouncing Ball Students select a ball that bounces. Collect data by letting the ball bounce from various heights and recording how high the ball bounces. Suggestions for data collection are on the sheet. Use this data to predict how high a ball will bounce when the ball is dropped from a much higher height.

Happy Balls search for “happy ballswww.sciencekit.com One ball bounces while the other doesn’t. They act differently when place in the deep freeze or boiling water.

Pendulum Activities

Activities Create a one second timer. Collect data and predict the period for a much longer pendulum.

Accuracy: In increase accuracy let the pendulum swing a couple of times before starting to time. Begin timing when the pendulum is at an extreme position. Either far to the left or right. Time for 10 swings and divide by 10 to get the time for one swing.

Procedure: Measure the period of a pendulum using lengths from 10 cm to 80 cm. Use the accuracy ideas listed above. Use six to eight different points. Record the data on the sheet provided. Plot the points on the graph. Length of pendulum goes on x-axis. Time goes on the y-axis.

Choose Your Activity Bouncing ball –Choose a ball –The height dropped from will be cm Pendulum –The length of the larger pendulum will be We will test your predictions at The length of the pendulum will be 275 cm The height of the drop will be 301

Double Pendulum Hold the pendulum above the edge of a table and allow to swing. The period swinging large and part of the swing will be under the table. Each contribute to the period of the pendulum.

Processing Ball bounce –Olympic challenge Pendulum –More information on the full document in the folder on calculating gravity M & M activity –Document in folder –Can be done as growth or decay –Also non-linear

M & M Activity Experiment 1—Begin with 4 M&Ms in a cup. Shake the cup, pour out, count the number of “M” that are showing, add that number M&Ms to the cup, and write down the total number of M&Ms in the cup. Repeat until another trial can not be completed. Experiment 2—Begin with a full cup and take out the number of M&Ms each time that have a “M” showing.

Graphing the Data Experiment 1 will be an exponential growth curve. Experiment 2 will be an exponential decay curve.

Liquid Assets This activity comes from “Liquid Assets: Increasing Students’ Mathematical Capital” Mathematics Teacher, March 2000, pages Each group needs a cylindrical glass of drinking water (the closer to a cylinder the better), a straw, a centimeter ruler, graph paper, (maybe graphing calculator)

Liquid Assets Directions Directions are not given on the sheet. You are asked to describe the experiment. –Students designate a “sipper” from the group. –Measure and record the height of the water. –The sipper takes a sip of water. –Measure the height of the water. –The next sips of water should be as uniform as possible. –Continue until the water is gone.