Question

introduction to biology: tutorial
the tomato plants will grow faster and taller in soil with compost over a 30 - day period.
part e
how would you conduct your investigation? in your answer, explain your independent and dependent variables.

Explanation:

Step1: Define investigation setup

Divide tomato - plants into two groups. One group in soil with compost, the other in soil without compost. Keep other factors (light, water, temperature etc.) constant.

Step2: Identify independent variable

The independent variable is the presence or absence of compost in the soil. It is the factor that we manipulate.

Step3: Identify dependent variable

The dependent variable is the growth rate and height of the tomato plants. It is what we measure as it is affected by the independent variable.

Answer:

To conduct the investigation, divide tomato plants into two groups: one in soil with compost and one in soil without compost, keeping other environmental factors constant. The independent variable is the presence of compost in the soil, and the dependent variable is the growth rate and height of the tomato plants.