Question

Justin is planning his science fair project. He wants to measure how oxygen levels affect the rate of photosynthesis in plants. Is this an example of a scientific investigation or an experiment? (5 points)

An experiment because it tests a cause and effect relationship
An experiment because it does not ask a testable question
An investigation because it uses only observations
An investigation because there is a control group

Answer 1

Answer: C IS RIGHT

Step-by-step explanation:

TOOK TEST ITS RIGHT

Answer 2

The 3rd Option

Step-by-step explanation:

Simple for this question, C: an investigation because it uses only observations.