8. A scientist plants two rows of corn for
experimentation. She puts fetilizer on row
1 but does not put fertilizer on row 2. Both
row received the same amount of water
and light intensity. She checks the growth
of the corn over the course of five months.
What is one constant variable in this
experiment?
A. Amount of fertilizer
B. Growth of corn
C. Type of fertilzer
D. Number of months of observation
Share
Answer:
lettet D
Explanation:
hope it helps po