Describe any precaustions you should take when setting up your boiling water apparatus.

1. Always  work with caution.

2. Set up on a steady surface away from flammable materials.

3. Do not heat a water apparatus above its flash point.

4. Water level should be regularly monitored, and filled with distilled water

   only.

5. Ensure that the cover is closed to prevent evaporation and to help    

   reaching high temperatures.

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

: )

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.