Scientific Method - Controls And Variables Worksheet Template (Page 2 of 3) in pdf

Scientific Method - Controls And Variables Worksheet Template Page 2

Squidward’s Symphony

Squidward loves playing his clarinet and believes it attracts more jellyfish than any other instrument he

has played. In order to test his hypothesis, Squidward played a song on his clarinet for a total of 5

minutes and counted the number of jellyfish he saw in his front yard. He played the song a total of 3

times on his clarinet and repeated the experiment using a flute and a guitar. He also recorded the

number of jellyfish he observed when he was not playing an instrument. The results are shown in the

chart.

Number of Jellyfish/Instrument

10. What is the independent variable?

Trial

No Music Clarinet

Flute

Guitar

11. What is the dependent variable?

12. What should Squidward’s conclusion be?

13. Are the results reliable? Why or why not?

Super Bubbles

Patrick and SpongeBob love to blow bubbles! Patrick found some Super

Bubble Soap at Sail-Mart. The ads claim that Super Bubble Soap will

produce bubbles that are twice as big as bubbles made with regular bubble

soap. Patrick and SpongeBob made up two samples of bubble solution. One

sample was made with 5 oz. of Super Bubble Soap and 5 oz. of water, while

the other was made with the same amount of water and 5 oz. of regular

bubble soap. Patrick and SpongeBob used their favorite bubble wands to

blow 10 different bubbles and did their best to measure the diameter of each

one. The results are shown in the chart

14. What did the Super Bubble ads claim?

Bubbles

(Diameter in centimeters)

15. What is the independent variable?

Bubble

Super

Regular

Bubble

Soap

16. What is the dependent variable?

17. Look at the results in the chart.

a. Calculate the average diameter for each bubble solution.

Super Bubble = ______ cm Regular Soap = ________ cm

b. What should their conclusion be?

18. Are the results reliable? Why or why not?

T. Trimpe 2003

Scientific Method - Controls And Variables Worksheet Template Page 2