Exploring how to manipulate speed....
Today we had a blast exploring how to increase speed using our roller coaster tubes. I started with a review and we made an anchor chart to show the main points of force and motion:
Then we did an guided inquiry lesson using our roller coaster tubes. In order for the students to see that this time we were testing a basic ramp design, I modeled how to make the ramp levels for the students to see. Then I showed the students how to measure speed with stop watches. I recommend practicing that for a while.
Then we got into our small groups again and used the sheet to record the speeds each time. I find that it is important to assign jobs for testing. Have one person be the recorder, one measure the time, one drop the marble and hold the top of the tube, and one to hold the bottom of the tube. This seems to work really well.
Here is an example of what the recording sheet looks like. You can download it for free at the side of the blog where it says:
What else did you
notice?
By the way, my students have so much fun with this unit that today when it was raining, they chose to make roller coasters during inside recess. A passing adult said, even during recess your kids are doing science! So true! Love it!
Today we had a blast exploring how to increase speed using our roller coaster tubes. I started with a review and we made an anchor chart to show the main points of force and motion:
Then we did an guided inquiry lesson using our roller coaster tubes. In order for the students to see that this time we were testing a basic ramp design, I modeled how to make the ramp levels for the students to see. Then I showed the students how to measure speed with stop watches. I recommend practicing that for a while.
Then we got into our small groups again and used the sheet to record the speeds each time. I find that it is important to assign jobs for testing. Have one person be the recorder, one measure the time, one drop the marble and hold the top of the tube, and one to hold the bottom of the tube. This seems to work really well.
Here is an example of what the recording sheet looks like. You can download it for free at the side of the blog where it says:
Q: How can you increase an object’s (marble)
speed?
Plan: I will….
Use the same materials – tubes, marble and cup. (constant)
Change
the height of the slope each time. (variable)
Data:
Trial
|
Height
|
Time
|
1
|
Smallest
slope
|
|
2
|
Small
slope
|
|
3
|
Medium
slope
|
|
4
|
Tall
slope
|
|
5
|
Tallest
slope
|
Conclusion: If we increase the height of the slope, then
the time will _____________________
Because
the speed will ________________________.
By the way, my students have so much fun with this unit that today when it was raining, they chose to make roller coasters during inside recess. A passing adult said, even during recess your kids are doing science! So true! Love it!
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