Science Investigation 7

The data collected supports which of the following questions that Squidward could have tested?

• Which song does the audience prefer?
• Which instrument does the audience like best?
• Which reed length creates the best sound?
• How do applause affect performance?

Squidward found new reeds to tryout for his clarinet.  He used an APPLAUSOMETER to measure applause after playing  Under the Sea with each reed.  The results were put in the table.
What was controlled?

• The Song
• The Reed
• The Applause

Paco's daughter will be participating in an upcoming dance recital. She will require a different costume for each dance she plans to performs.
c = the number of costumes Paco's daughter will require
d = the number of dances Paco's daughter plans to perform
Which of the variables is independent?

• c
• d

When experimenting with the growth of a plant, a scientist uses three of the same type of plants, two different fertilizers, equal light, and equal water. What type of variable is the fertilizer?

• Dependent 
• Independent 
• Control
• Compound

Research Question: Does the type of gasoline put in a car effect how fast the car can drive? What is the independent variable?

• Type of gasoline
• which car the gas is put into
• how fast the car can drive
• how much gas is put into the car

When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the fertilizer?

• Dependent
• Independent
• Control

Jessie is concerned about how tired his classmates seem. He created a drink that he thinks will boost their energy. He recruits 100 classmates with a history of tiredness. He has 50 of them drink his new special energy drink. The other 50 drink a beverage that looks like the special energy drink, but is just water and food coloring. Both groups were told that they were getting the special drink that would boost energy. After 2 hours, 30 classmates in the first group reported having more energy and 8 classmates in the second group reported having more energy.
What is the independent variable?

• Amount of energy
• Type of Drink
• The food coloring
• There isn't one

This variable in an experiment is the one being deliberately changed by the scientist. 

• dependent variable
• independent variable
• data
• control group

If a student thinks an apple a day keeps the doctor away what are some constants they need to consider?

• the number of apples eaten by test subject, who eats them, amount of sleep testing subjects recieve
• the apples
• the number of doctors visits
• the age of the test subjects, the general sleep and meals eaten by test subjects

This part of the experiment serves as a basis of comparison; the one variable being tested has been omitted. 

• experimental group
• control group
• data
• variables