Students will use the engineering design process to design and carry out an investigation to make observations and collect data on swingers to provide evidence that a pattern can be used to predict future motion.
Engage:
1. Demonstrate a standard 38cm swinger for Ss.
2. Have them fill out I notice... I Wonder... I relate... in their journals while observing. 3. Discuss observations in groups.
4. Have the Reporter share what their group noticed and wondered.
5. Discuss in groups where they have seen swingers? Reporters share with whole class.
6. Discuss what a pendulum is and the parts of a pendulum.
I guide to students to the fact that the swing makes a pattern (it doesn't swing higher on the opposite side or swing super low on the other, etc.)
Explore:
1. Have groups make a standard swinger, 38cm.
2. Ss will count swings during 15 seconds. T times to keep this consistent.
3. Discuss why swings could be different.
4. Come up with standard release point and that a full swing is across and back.
5. Test again and record data.
6. Ask Ss to come up with variables that will change the outcome of the swing.
We then test: Mass (by adding a penny), Release Point, and Length of String.
We make a prediction of the outcome before testing, test and record data 3 times.
Length of string...this test is a little more involved. Have partners pick a length in cm to test. They will put their length on a chart on the board so that there are no duplicates. After the swingers are made, we test 3 times and record the data on the board.
Explain:
7. Have Ss look for patterns in the data. (They should notice that mass and release point makes no difference. The longer the string, the fewer swings; the shorter the swing, more swings.)
8. Students record patterns they notice from the data and explain why the length of string changed the outcome.
9. Discuss large group.
Extend:
Ask: Can you design a pendulum and predict the number of swings by string length?
Imagine: Discuss and draw a design of your pendulum.
Plan: Write a plan of your pendulum design and record length of pendulum.
Create: Create a pendulum, being intentional about its length.
Test: Test pendulum.
Modify: Modify design and record modifications in notebook.
*When finished building pendulum, have Ss record prediction of swings (15 seconds) in notebooks. Use data from string length collected from standard swinger for prediction. Then test.
*Students will present predictions, test, and pendulum to class.
Evaluate:
Ts can evaluate Ss understanding of the performance expectation through discussion and looking at Ss notebook.
No comments:
Post a Comment