a fact because most people agree. a fact because it has been observed and tested. an opinion because both metals are hard to find. an opinion because more research is needed.
I gave my students this multiple choice question: The statement "gold is more dense than lead" is

Only one answer is correct among these 4 choices:
- a fact because most people agree.
- a fact because it has been observed and tested.
- an opinion because both metals are hard to find.
- an opinion because more research is needed.

Could you tell me which one is correct?

a fact because it has been observed and tested.