Is the sample warm or cold? How valuable is the sample? Has the sample ever been melted? Does the sample conduct electricity?
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which question will best help a student determine the composition of an unknown substance?
Possibilities:
- Is the sample warm or cold?
- How valuable is the sample?
- Has the sample ever been melted?
- Does the sample conduct electricity?

Does the sample conduct electricity?