Experimental Design Practice

You read that cats will meow more if they eat more ice cream.  You decide to do an experiment to test this hypothesis.  Using your cat for the experiment, you feed your cat 50 cm³ of vanilla ice cream, 100 cm³, and no (0 cm³).  You made sure that during your experiment, you used the same beaker, same brand of ice cream, the same temperature ice cream, and the same procedure for feeding your cat.  Once your cat was finished eating you counted the number of times he meowed in 10 minutes.  You recorded your data in a data table.  
What is the independent variable (IV) in this experiment?

• The cat
• The amount of ice cream
• The number of meows
• The type of ice cream

You read that cats will meow more if they eat more ice cream.  You decide to do an experiment to test this hypothesis.  Using your cat for the experiment, you feed your cat 50 cm³ of vanilla ice cream, 100 cm³, and no (0 cm³).  You made sure that during your experiment, you used the same beaker, same brand of ice cream, the same temperature ice cream, and the same procedure for feeding your cat.  Once your cat was finished eating you counted the number of times he meowed in 10 minutes.  You recorded your data in a data table.  
What is the dependent variable (DV) in this experiment?

• The cat
• The amount of ice cream
• The number of meows
• The type of ice cream

You read that cats will meow more if they eat more ice cream.  You decide to do an experiment to test this hypothesis.  Using your cat for the experiment, you feed your cat 50 cm³ of vanilla ice cream, 100 cm³, and no (0 cm³).  You made sure that during your experiment, you used the same beaker, same brand of ice cream, the same temperature ice cream, and the same procedure for feeding your cat.  Once your cat was finished eating you counted the number of times he meowed in 10 minutes.  You recorded your data in a data table.  
What is the control group in this experiment?

• The cat
• 0 cm³ of ice cream (no ice cream)
• 100 cm³ of ice cream
• The type of ice cream

The type of variable that you change or manipulate in an experiment.  It is what you are testing.

• Independent
• Dependent
• Control

The type of variable that responds to the experiment and is what you measure to determine if your hypothesis is true.

• Independent
• Dependent
• Control

Tags

NGSS.MS-LS1-5

The parts of the experiment that must be kept the same.

• Constants
• independent
• Dependent

If I water the plant more often, then it will grow taller.  Name the independent variable.

• The height of the plant
• The size of the pot
• The amount of water
• The amount of light.

Tags

NGSS.MS-LS1-5

If I water the plant more often, then it will grow taller.  Name the dependent variable.

• The amount of water.
• The amount of soil.
• The height of the plant.
• The amount of water.

Tags

NGSS.MS-LS2-1

If I water the plant more often, then it will grow taller. Which of these is not a constant?

• The amount of soil.

• The pot size.

• The type of plant.

• The amount of water.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Look at the bar graph, "Nicest Fruit". What does the x-axis show?

• Types of fruit

• The number of people.

Tags

CCSS.HSN.VM.C.6