pedro has collected different kinds of rocks. he begins testing the rocks hardness to see how they compare…

pedro has collected different kinds of rocks. he begins testing the rocks hardness to see how they compare. what is the best phrase to describe what pedro is doing? a. reporting scientific results b. asking a scientific question c. forming a prediction d. conducting a scientific investigation
Answer
Brief Explanations:
Pedro is testing the rocks' hardness, which is part of a scientific investigation process that includes observation and experimentation. He is not just reporting results, asking a question, or forming a prediction at this stage.
Answer:
D. conducting a scientific investigation