Experimental Design B/C

Test your knowledge of various Science Olympiad events.
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kate!
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Re: Experimental Design B/C

Postby kate! » March 5th, 2018, 1:15 pm

1. How does an outlier in the data occur?
2. Why do we need controlled variables?
Two years ago I knew stuff about rocks, minerals, experiments, and ecosystems, yay!
Last year I knew stuff about amphibians, reptiles, freshwater, and more experiments, yay again!
Now I know stuff about oceanography, saltwater, and birds, yay for the third time!

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dxu46
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Re: Experimental Design B/C

Postby dxu46 » March 5th, 2018, 1:25 pm

1. How does an outlier in the data occur?
2. Why do we need controlled variables?
1. An outlier occurs when there is an error in execution, recording, etc.
2. Controlled variables help make sure only one thing is tested and the results only come from one source.

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kate!
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Re: Experimental Design B/C

Postby kate! » March 5th, 2018, 1:26 pm

1. How does an outlier in the data occur?
2. Why do we need controlled variables?
1. An outlier occurs when there is an error in execution, recording, etc.
2. Controlled variables help make sure only one thing is tested and the results only come from one source.
Great job, your turn.
Two years ago I knew stuff about rocks, minerals, experiments, and ecosystems, yay!
Last year I knew stuff about amphibians, reptiles, freshwater, and more experiments, yay again!
Now I know stuff about oceanography, saltwater, and birds, yay for the third time!

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dxu46
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Re: Experimental Design B/C

Postby dxu46 » March 5th, 2018, 1:32 pm

1. What are some examples of ways to shorten up the procedure?
2. A quantitative experiment's data is represented by a ____ graph (fill in the blank)

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kate!
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Re: Experimental Design B/C

Postby kate! » March 5th, 2018, 1:50 pm

1. What are some examples of ways to shorten up the procedure?
2. A quantitative experiment's data is represented by a ____ graph (fill in the blank)
1. Use diagrams and just say "repeat" instead of writing everything out.
2. Line graph.
p.s. what would a qualitative experiment be represented by?
Two years ago I knew stuff about rocks, minerals, experiments, and ecosystems, yay!
Last year I knew stuff about amphibians, reptiles, freshwater, and more experiments, yay again!
Now I know stuff about oceanography, saltwater, and birds, yay for the third time!

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dxu46
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Posts: 798
Joined: April 11th, 2017, 6:55 pm
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Re: Experimental Design B/C

Postby dxu46 » March 5th, 2018, 4:25 pm

1. What are some examples of ways to shorten up the procedure?
2. A quantitative experiment's data is represented by a ____ graph (fill in the blank)
1. Use diagrams and just say "repeat" instead of writing everything out.
2. Line graph.
p.s. what would a qualitative experiment be represented by?
Correct, and for a qualitative experiment any appropriate graph excepting a line graph would work (e.g. bar, etc.)

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kate!
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Re: Experimental Design B/C

Postby kate! » March 9th, 2018, 8:27 pm

1. Write a sample rationale and hypothesis. Why is it important to have a rationale for your hypothesis?
2. Why would using a bar graph for a quantitative experiment and a line graph for a qualitative experiment not work?
Two years ago I knew stuff about rocks, minerals, experiments, and ecosystems, yay!
Last year I knew stuff about amphibians, reptiles, freshwater, and more experiments, yay again!
Now I know stuff about oceanography, saltwater, and birds, yay for the third time!

User avatar
dxu46
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Posts: 798
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Re: Experimental Design B/C

Postby dxu46 » March 10th, 2018, 7:35 am

1. Write a sample rationale and hypothesis. Why is it important to have a rationale for your hypothesis?
2. Why would using a bar graph for a quantitative experiment and a line graph for a qualitative experiment not work?
1. If a ball is rolled down ramps of different ramps, then it will roll the farthest on the ramp of the greatest height because there is more potential energy at the start of a higher ramp than the start of a lower ramp, so therefore there is more kinetic energy, so the ball will roll farther.  A rationale is important because it justifies your hypothesis (and it gives you points :D)
2. In a quantitative experiment, you are measuring change, and a bar graph doesn't show change.  In a qualitative experiment, you are comparing the IV levels, and a line graph doesn't compare.

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kate!
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Re: Experimental Design B/C

Postby kate! » March 10th, 2018, 3:15 pm

1. Write a sample rationale and hypothesis. Why is it important to have a rationale for your hypothesis?
2. Why would using a bar graph for a quantitative experiment and a line graph for a qualitative experiment not work?
1. If a ball is rolled down ramps of different ramps, then it will roll the farthest on the ramp of the greatest height because there is more potential energy at the start of a higher ramp than the start of a lower ramp, so therefore there is more kinetic energy, so the ball will roll farther.  A rationale is important because it justifies your hypothesis (and it gives you points :D)
2. In a quantitative experiment, you are measuring change, and a bar graph doesn't show change.  In a qualitative experiment, you are comparing the IV levels, and a line graph doesn't compare.
Great answers, your turn. (welp in the last practice experiment our group did- qualitative- our math guy used a line graph... it didn't work out well, now i know why)
Two years ago I knew stuff about rocks, minerals, experiments, and ecosystems, yay!
Last year I knew stuff about amphibians, reptiles, freshwater, and more experiments, yay again!
Now I know stuff about oceanography, saltwater, and birds, yay for the third time!

User avatar
dxu46
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Posts: 798
Joined: April 11th, 2017, 6:55 pm
Division: C
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Re: Experimental Design B/C

Postby dxu46 » March 11th, 2018, 6:59 am

1. Define "operationally defined"
2. Why wouldn't "the color of the floor" or "the humidity level" work as controlled variables?


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