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?