The relative atomic mass of calcium is 40. The relative atomic mass of chlorine is 35.5. A salt was analysed and was found to be 36% calcium and 64% chlorine by mass. The salt is shown below.

b. examine and describe cells

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.

they are called fossil fuels