One student lifts a rock and skips it across a stream. One student thinks about rocks and writes down his opinion. Two students study a rock and then compare their observations. Two students remove rocks from a garden and then plant flowers.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which of these best demonstrates the characteristics of science?
Possibilities:
- One student lifts a rock and skips it across a stream.
- One student thinks about rocks and writes down his opinion.
- Two students study a rock and then compare their observations.
- Two students remove rocks from a garden and then plant flowers.

Two students study a rock and then compare their observations.