Question

a student tests whether fertilizer increases tomato production. what is the independent variable?
fertilizer
tomato production
constant

a student tests whether fertilizer increases tomato production. what is the dependent variable?
fertilizer
tomato production
constant

a student tests whether fertilizer increases tomato production. which are constants?
tomato production
water
soil
fertilizer
light

Explanation:

Independent variable is the manipulated factor; dependent variable is the measured outcome; constants are unchanged variables to ensure validity.

Answer:

A. Fertilizer
B. Tomato Production
C. Water, Soil, Light