Oil Spreads on water to form a film about 120mm thick (2 significant figures) How many Square
Kilometers of ocean will be covered by the
Slick formed when two barrels of oil are
Spilled (1 barrel = 31.5 us gallons)

1.43 x 10^-11 j the guy commented the awnser just making sure u see it .

b) nuclear ive learned that in a pedtrodic table

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.