December 14, 2010
Attendance
Organize Science Binders
Investigation 2B: Speed
Learning Targets: Accurately collect and record data
Use data to calculate speed and find averages
You should receive 4 pieces of homework turned back. If not, where can you get a copy?
How do you turn something in late?
Organizing Science BindersPlace the following assignments as flippers in the correct
spread in your science notebook.
2.2 Averaging Worksheet (white) #211.2 Stopwatch Math (pink) #222.2A Speed (blue) #232.2B Speed (green) #24
Investigation 2B: Speed
Before we get started…
– What two pieces of information do you need to find the car’s speed?
»Distance traveled»Time traveled
– What formula will you use?»Speed = distance
time
Investigation 2B
Which ramp is fastest?
Speed
Science 5/6B
Part 4:
Let’s collect class average data.
Hole Average Speed (cm/s)
12 163.668
2 28.182
17 211.700
14 66.744
14 179.710
18 189.304
16 174.200
17 199.970
Science 1/2B
Part 4:
Let’s collect class average data.
Hole Average Speed (cm/s)
12 162.662
16 207.643
2 21.148
18 228.600
6 108.952
17 196.326
15 27.422
11 178.225
Science 3/4A
Part 4:
Let’s collect class average data.
Hole Average Speed (cm/s)
12 164.354 cm/s
17 200.333 cm/s
18 185.648 cm/s
2 108.206 cm/s
18 205.570 cm/s
18 5,158.2 cm/s
13 481.600 cm/s
13 206.534 cm/s
Science 1/2A
Part 4:
Let’s collect class average data.
Hole Average Speed (cm/s)
1 54.221 cm/s
2
3 58.500 cm/s
15 191.887 cm/s
6 117.987 cm/s
9 137.900 cm/s
12 118.000 cm/s
13 28.481 cm/s
Investigation 2B: Speed
Part 4: Analyze Class Data
– Are the results what you expected?
– Do they support your original hypothesis?
– Answer question 4b on your worksheet.
Science 5/6BPart 5:
There are FIVE major variables, other than ramp angle, that need to be kept the same in order for our experiment to have a fair test. How can we control each one?
Variable How we will control it
Distance between photogate 60 cm
Ramp Height Hole #12
Top photogate 10 cm
Bottom photogate 70 cm
Start cars Fingers underneath on screw
Science 1/2BPart 5:
There are FIVE major variables, other than ramp angle, that need to be kept the same in order for our experiment to have a fair test. How can we control each one?
Variable How we will control it
Distance between photogates 55 cm apart
Top photogate 25 cm
Bottom photogate 80 cm
Ramp Height Hole #17
Car Drop position Finger underneath on screw
Science 3/4APart 5:
There are FIVE major variables, other than ramp angle, that need to be kept the same in order for our experiment to have a fair test. How can we control each one?
Variable How we will control it
Distance is the same Photogates are 70 cm
Ramp height Hole #16
Top photogate in same spot 10 cm
Bottom photogate at same 80 cm
Start car Finger on top of screw
Science 1/2APart 5:
There are FIVE major variables, other than ramp angle, that need to be kept the same in order for our experiment to have a fair test. How can we control each one?
Variable How we will control it
Location of the top photogate 10 cm
Location of bottom photogate 80 cm
Distance between photgates 70 cm
How car is released Let go by holding on bottom (underneath)
Height of bottom of track Hole #10
Investigation 2B: Speed
Part 6: Read and follow the directions in the manual. Be sure to control ALL variables! Record your data on your worksheet.
Science 5/6B
Part 7:
Let’s collect class average data now that we have a fair
test.
Hole Average Speed (cm/s)
Jup 148.147
Sun 153.333
Nept 155.022
Venus 155.170
Mars 152.814
Uran 155.620
Sat 155.200
DK 154.045
Science 1/2B
Part 7:
Let’s collect class average data now that we have a fair test.
Hole Average Speed (cm/s)
Jup 244.41
Sun 237.80
Nept 232.70
Venus 241.19
Mars 233.38
Uran 243.74
Sat 236.63
DK 235.75
Science 5/6BWhich ramp is the
fastest?
Copy this table on spread #25 in your
notebook.
Hole Average Speed (cm/s)
2 30.171
4 70.600
6 97.990
8 119.363
10 172.344
12 147.670
14 160.495
17 183.027
Investigation 2B: Speed
Part 7: Analyze Class Data
– Was your original hypothesis correct?
– Answer question 7b on your worksheet.
– The walking speed of an average person is 1 m/s or 100 cm/s. How does your car’s speed compare?
– Answer question 7c.
Investigation 2B: Speed
Part 8: Exploring on your own
a. Skip
b. Work out this problem on your worksheet.
Wrap Up
1. Summary (on worksheet):Which ramp is fastest? How do you know?
2. December Science Test Thursday 12/16 or Fri 12/17
3. Homework Study Guide
Adult Input Page Are you ready for the notebook check?