David and Luisa are trying to determine if two samples are the same or different substances. First, they observed sample 1 and sample 2. Then, they wrote down their observations. Review their observations. Then, answer the questions below.

Which student’s observations would prove more useful to a chemist?

David's observations

Luisa's observations
Explain your answer below.

David and Luisa are trying to determine if two samples are the same or different substances First they observed sample 1 and sample 2 Then they wrote down their class=