(Question)
Q: What is a thick, dark brown or black liquid found in rock layers of the earth's crust? Choices: - propane - fossil fuel - coal - oil A:
(Answer)
oil

(Question)
Q: The amount of force applied per given area is called? Choices: - energy - strength - power - pressure A:
(Answer)
pressure

(Question)
Q: What is a change in the sequence of bases in dna or rna called? Choices: - radiation - infection - evolution - mutation A:
(Answer)
mutation