1.What is the scientific problem in the
experiment?
A. What is the effect of the size of the nail
to the strength of the electromagnet?
B. What is the effect of the number
of dry cells to the strength of the
electromagnet?
C. What is the effect of the number
of coils to the strength of the
electromagnet?
D. What is the effect of the number of
paper clips attracted to the strength of
the electromagnet?
2. What are the controlled variables in
the experiment?
I. number of coils
number of dry cells
III. number of paper clips
IV. size of nail
A. I and II
B. II and III
C. II and IV
D. I and III
3. What is the independent variable in the
experiment?
A number of coils
B. number of dry cells
C. number of paper clips
D. size of nail
4. What is the dependent variable in the
experiment?
A number of coils
B. number of dry cells
C. number of paper clips
D. size of nail
5. Which of the following is the BEST
conclusion for the experiment?
A. Increasing the number of coils
increases the strength of an
electromagnet.
B. Decreasing the number of
coils increases the strength of an
electromagnet.
C. Increasing the number of dry
cells increases the strength of an
electromagnet.
D. Decreasing the number of dry
cells increases the strength of an
electromagnet