Question

Mario performed an experiment to determine if photosynthesis was affected by the amount of light that a plant received. The data from his experiment are shown in the table below.

Amount of light
(hours)

Number of plants
Average volume of oxygen produced (mL)
1
4
0.50
6
4
2.0
10
4
5.0

What could he have done to increase the validity of his data?

Answer 1

Add a 0 hours control

Explanation: This is correct on edgen

Answer 2

To increase the validity of the data introduce a 0 hour control

Step-by-step explanation

There are three ways that can be done to improve the validity of data in an experiment. They are; changing only one independent variable at a time, measuring dependent variable accurate and focusing on control. The control in this case will be the zero hour control which is a key for producing sound data.