The table below shows the average height of the plants by the end of one week.
Plant Group Fertilizer amount (g) Avg height of plants (cm)
1 0 3.0
2 5 3.2
3 10 4.4
4 20 5.0
7. Which of the plant groups is the control group?
A. Plant Group 1 C. Plant Group 3
B. Plant Group 2 D. Plant Group 4
8. What is the dependent variable in this experiment?
A. amount of soil C. type of tomato plant
B. amount of fertilizer D. height of the plants
9. A scientist who wants to study the effects of fertilizer on plants sets up an experiment.
Plant A gets no fertilizer, Plant B gets 10 mg. of fertilizer each day, and Plant C gets
20 mg. of fertilizer each day. Which plant is the control group? A
A. Plant A C. Plant C
B. Plant B D. All of the above
10. How do you make a conclusion?
A. You will guess what the results should be.
B. You look at your hypotheses and choose which one you like best.
C. You keep making different tests until they show what you want to see.
D. You compare the data from your experimental results to the prediction they tested