Before you can write down which solvent you used in each TLC, Professor Snape uses obliviate on you and now you no longer remember which solvent you used in each TLC. However, you have bottles of pure solutions of (1) diethyl ether, (2) dichloromethane, and (3) toluene on your bench. You discuss with Hermione which solvent you likely used in each TLC,

gold is my favorite solid.

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.

answerspecific gravity;