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Experimental Variable Bellwork #1- Energy

Last updated almost 2 years ago
4 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

The number of flowers on different breeds of bushes in a greenhouse is recorded every week for two months.

  • Different breeds of bushes
  • Number of flowers
  • Recorded every week for two months
  • Independent Variable
  • Dependent Variable
  • Constants
1

You give four sunflowers different watering with either pure water or different concentrations of salt solutions. After a two-week period, the height of the sunflowers is measured.

  • Different watering- water or different concentrations of salt water
  • Height of sunflowers
  • Two week period
  • Independent Variable
  • Dependent Variable
  • Constants
1

Three redwood trees are kept at different humidity levels inside a greenhouse for 12 weeks. One tree is left outside in normal conditions. Height of the tree is measured once a week.

  • Height of redwood tree.
  • Greenhouse conditions, 12 weeks, height recorded once a week.
  • Different humidity levels.
  • Independent Variable
  • Dependent Variable
  • Constants
1

One tank of goldfish is fed the normal amount which is once a day; second tank is fed twice a day; and a third tank is fed four times a day during a six-week study. The fishes' body fat is recorded daily.

  • Results recorded daily, same kind of food, fish kept in tank, six week study.
  • Amount goldfish are fed per day.
  • Fishes' body fat.
  • Independent Variable
  • Dependent Variable
  • Constants