Proficiency #2
PROBLEM- what surface will make the toy car the slowest? Fastest?
HYPOTHESIS- I think that the smoothest surface will have the greatest speed because their will be less friction on the toy car as it descends, While the visibly bumpiest surface will slow the toy car on the descent
VARIABLES
Control- typical surface with average smoothness
IV- the smoothness of the surface
DV- speed that the car travels on each surface
Control- typical surface with average smoothness
IV- the smoothness of the surface
DV- speed that the car travels on each surface
CV-ramp, angle of ramp, same toy car
MATERIALS
toy car
1 car track
toy car
1 car track
Cup of pebbles from the sand
Cup of sand without the pebbles
timer
someone to record the data
a consistent stop watch holder
computer to record data on
an item to hold up the ramps at a consistent height
timer
someone to record the data
a consistent stop watch holder
computer to record data on
an item to hold up the ramps at a consistent height
Plates to catch the sand on when it falls off the track
PROCEDURE
1. gather all materials
2. set up ramp number one with least smooth surface
3. set toy car up on ramp and make sure stop watch is set for timing.
4. on the stop watch holders command let the car roll down the ramp.
5. once toy car has reached the end point of the ramp stop the timer immediately and record the results.
6. repeat steps 3-5 three more times for accurate results.
7. repeat steps 3-6 with the number 2 smoothness ramp.
8. repeat steps 3-6 with the number 3 smoothness ramp.
9. put all data into data table.
10. convert data table into graph.
11. form your and graph write up your conclusion.
12. clean up all materials.
1. gather all materials
2. set up ramp number one with least smooth surface
3. set toy car up on ramp and make sure stop watch is set for timing.
4. on the stop watch holders command let the car roll down the ramp.
5. once toy car has reached the end point of the ramp stop the timer immediately and record the results.
6. repeat steps 3-5 three more times for accurate results.
7. repeat steps 3-6 with the number 2 smoothness ramp.
8. repeat steps 3-6 with the number 3 smoothness ramp.
9. put all data into data table.
10. convert data table into graph.
11. form your and graph write up your conclusion.
12. clean up all materials.
smooth medium rugged
trial 1 0.94 1.49 2.44
trial 2 0.87 1.46 2.69
trial 3 0.98 1.46 2.65
trial 4 0.87 1.46 2.48
trial 1 0.94 1.49 2.44
trial 2 0.87 1.46 2.69
trial 3 0.98 1.46 2.65
trial 4 0.87 1.46 2.48
Conclusion:
My hypothesis was supported because the car traveled fastest on the smoothest surface and consistently decreased as the surfaces got more rugged. the smooth surface had an average of 90. 75, medium 1.45, rugged 2.57
Proficiency #1
Problem- does the mass of a bouncy ball affect its bounce when dropped?
Hypothesis- I think that the smaller and lighter bouncy ball will have a higher bounce back because it weighs less and doesn’t need as much force as a big bouncy ball to go back up against gravity .
Variables
Control- medium sized ball just between the small and medium ball
IV- the size of the ball
DV- the height of the bounce for the ball
Control- medium sized ball just between the small and medium ball
IV- the size of the ball
DV- the height of the bounce for the ball
Materials-
small sized bouncy ball
medium sized bouncy ball
large sized bouncy ball
yard stick
tape
pencil
paper
laptop
small sized bouncy ball
medium sized bouncy ball
large sized bouncy ball
yard stick
tape
pencil
paper
laptop
Procedure-
1. gather all materials
2. tape yard stick vertically to wall with tape
3. get the small, medium, and large ball ready
4. make sure someone is recording the data and someone is measuring the height of the bounce
5. first drop the small ball and measure its highest height after it has bounced on time. (make sure to be eye level when taking measurements)
6. record the data
7. repeat steps 4-6 with the small ball, 3 more times
8. repeat steps 4-6 with the medium sized ball
9. repeat step 8, 3 more times
10. repeat steps 4-6 with the medium ball
11. repeat step 10, 3 more times
12. insert data into table
13. insert data table into graph
14. draw your conclusion from the data given
15. clean up all materials
16. hand in project
1. gather all materials
2. tape yard stick vertically to wall with tape
3. get the small, medium, and large ball ready
4. make sure someone is recording the data and someone is measuring the height of the bounce
5. first drop the small ball and measure its highest height after it has bounced on time. (make sure to be eye level when taking measurements)
6. record the data
7. repeat steps 4-6 with the small ball, 3 more times
8. repeat steps 4-6 with the medium sized ball
9. repeat step 8, 3 more times
10. repeat steps 4-6 with the medium ball
11. repeat step 10, 3 more times
12. insert data into table
13. insert data table into graph
14. draw your conclusion from the data given
15. clean up all materials
16. hand in project
Small ball Medium Ball Large Ball
trial 1 31 28 29
trial 2 31 28.5 30
trial 3 31 28 29
trial 4 31 28 29
trial 1 31 28 29
trial 2 31 28.5 30
trial 3 31 28 29
trial 4 31 28 29
My hypothesis was supported; the smallest bouncy ball on average bounced higher than the medium and large bouncy balls with an average of 31
Proficiency #3
Problem- does the number of dominoes have an affect on the acceleration?
Hypothesis- I think that the larger amount of dominoes will have a larger acceleration because it will have more time to pick up speed.
Variables
Control- pressure used to push down dominoes
IV- Number of dominoes used
DV-rate of acceleration
Control- pressure used to push down dominoes
IV- Number of dominoes used
DV-rate of acceleration
Materials
Dominoes (at least 10)
someone to push down the dominoes
flat surface
recorder
timer
Dominoes (at least 10)
someone to push down the dominoes
flat surface
recorder
timer
Procedure
1. gather all materials
2. get the recorder and the person pushing down the dominoes
3. set up stack of dominoes
4. get timer ready to record
5. push down dominoes
6. record the time and divide it by the number of dominoes
7. repeat steps 3-6, 3 more times for more accurate results
8. add 2 blocks to the row of dominoes
9. repeat steps 3-7 with the newly added dominoes
10. repeat steps
1. gather all materials
2. get the recorder and the person pushing down the dominoes
3. set up stack of dominoes
4. get timer ready to record
5. push down dominoes
6. record the time and divide it by the number of dominoes
7. repeat steps 3-6, 3 more times for more accurate results
8. add 2 blocks to the row of dominoes
9. repeat steps 3-7 with the newly added dominoes
10. repeat steps
| 9 dominoes | 13 dominoes | 17 dominoes | |
| trial 1 | 0.86 | 1.01 | 1.31 |
| trial 2 | 0.79 | 1.06 | 1.27 |
| trial 3 | 0.89 | 0.98 | 1.29 |
My hypothesis was supported. The lesser amount of dominoes had a greater acceleration because they had fewer dominoes to interfere when completing the distance. The times were all consistent with each other showing that I no external variables took effect. The fewer the dominoes the faster the acceleration is what the numbers have plainly shown.
