Helpp! based on the definitions above, identify each of the following as biotic (B) or abiotic (A)

the sand in the desert __

the bacteria in a lake __

pollen from a plant __

pollution from an oil refinery __

Which compound contain an iron with a 3+ charge

In a copper wire, a temperature increase is the result of which of the following

Scientists have developed an explanation of a phenomenon from several verified hypotheses. the explanation has been confirmed through numerous experimental tests.which option best describes this explanation? a. scientific lawb. research questionc. hypothesisd. scientific theory