Select all the correct answers.

if a uranium atom undergoes both alpha and gamma decay, what happens to it?

1. the nucleus loses neutrons.
2. the nucleus loses positrons.
3. the nucleus loses protons.
4. the nucleus loses energy.
5. the nucleus loses electrons.

1, 3 and 4.

In an alpha decay, the atom's mass number is reduced by 4, and the atomic number is reduced by two following the emission of an alpha particle (2 protons and 2 neutrons).

In gamma decay, the atom releases energy spontaneously to stabilize itself, and this energy is released in the form of photons.

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.