Name
HYPOTHESES and VARIABLES PRACTICE
Write a hypothesis for each of the following problems.
1. What effect does high temperature have on radish germination?
2. What effect does studying with music have on student test scores?
3. What effect does food color have on the amount of food fish eat?
4. What effect does light have on plant growth?
5. What effect does smiling have on the teacher giving no homework?
For the following problems, identify the independent variable (IV), dependent variable (DV), standardizing variables (SV), and control group (CG)
1. The number of flowers on different breeds of bushes in a greenhouse is recorded every week for 2 months.
IV =
DV =
SV =
2. You give four sunflowers different watering with either pure water or different concentrations of salt solutions. After a 2 week period, the height is measured.
IV =
DV =
CG =
3. 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.
IV =
DV =
SV =
CG =
4. Pea plant clones are given different amounts of water for a 3 week period. The first plant receives 400 milliliters of water, the second gets 200 mL, and the third receives 100 mL. The fourth does not receive any extra water; the plant only receives natural ways of receiving water. The height is recorded daily.
IV =
DV =
SV =
CG =