1)
Independent Variable (IV): Different breeds of bushes
Dependent Variable (DV): Number of flowers
Constants: Greenhouse environment, recording time (every week), duration (two months)
Control: Not explicitly stated; typically one breed would serve as a baseline for comparison
2)
Independent Variable (IV): Type of watering solution (pure water or different concentrations of salt solutions)
Dependent Variable (DV): Height of sunflowers
Constants: Number of sunflowers (four), duration (two weeks), measurement method
Control: The sunflower watered with pure water
3)
Independent Variable (IV): Humidity level
Dependent Variable (DV): Height of the tree
Constants: Species (redwood trees), greenhouse setting for experimental trees, measurement frequency (once a week), duration (12 weeks)
Control: The tree left outside in normal conditions
Parent Tip: Review the logic above to help your child master the concept of variables in science worksheet.
