What are some chemistry questions

1. What is a substance that CANNOT be chemically broken down into simpler substances?

2. What type of change is one that produces new substances like burning wood to make ashes or mixing mentos and coke. You can't get the wood or the mentos back.

3. What is a change from a solid directly to a gas

4. What is a change from a gas to a liquid

5. What are nonmetals in group 7A of the periodic table?

1. An element

2. Chemical change

3. sublimation

4. condensations

5. Halogens

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.