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Experimental Variables Bellwork #2-Energy

Last updated almost 2 years ago
5 questions
Directions: Determine the Independent Variables, Dependent Variables, and Constants from the following science experiments.

Independent Variable- what the experimenter changes during the experiment.
Dependent Variable- what the experimenter measures.
Constants- things that are kept the same.
1

You decide to clean the bathroom. You notice that the shower is covered in a strange green slime. You decide to try to get rid of this slime by adding lemonade juice. You spray half of the shower with lemonade juice and spray the other half of the shower with water. After 3 days of treatment, there is no change in the appearance of the green slime on either side of the shower.

  • Type of treatment- water or lemonade
  • Whether green slime remains
  • Same bathroom, three days of treatment for both
  • Independent Variable
  • Dependent Variable
  • Constants
1

Let's say your hypothesis for the above was: IF I spray lemonade on the green slime in my shower, THEN the green slime will disappear. Was your hypothesis supported or rejected in the above scenario?

1

Dr. Smith wants to examine whether a new drug increases the maze running performance of older rats. Just like aging humans, older rats show signs of poorer memory for new things. Dr. Smith teaches two groups of older rats to find a piece of tasty rat chow in the maze. One group of rats is given the new drug while they are learning the maze. The second group is not given the drug. One week after having learned the maze, he retests the rats and records how long it takes them to find the rat chow.

  • Rats are given drug or not given drug.
  • All older rats, same maze, same kind of chow.
  • Time it takes rats to find the chow.
  • Independent Variable
  • Dependent Variable
  • Constants
1

An experiment was performed where students had to read on two different size chromebook screens- one large and one small. Researchers measured their reading speed. Which size chromebook led to a faster reading speed among the students?

1

An experiment was performed where students had to read on two different size chromebook screens- one large and one small. Researchers measured their reading speed. The x axis was the independent variable, or the ___________________.