Author Question: Briefly describe why the detection of neutrinos coming from the Sun supports the theory that the Sun ... (Read 56 times)

charchew · **on:** Jul 27, 2018

Briefly describe why the detection of neutrinos coming from the Sun supports the theory that the Sun generates energy by nuclear fusion.

What will be an ideal response?

Question 2

Recent evidence suggests that Mars once had a global magnetic field. Assuming this is true, which of the following could explain why Mars today lacks a global magnetic field like that of Earth?

A) Mars rotates much slower than the Earth.
B) The Martian core is made of rock, while Earth's core is made of metal.
C) Mars's interior has cooled so much its molten core layer no longer undergoes convection.
D) Mars is too far from the Sun to have a global magnetic field.

Kdiggy · **Reply #1 on:** Jul 27, 2018

Answer to Question 1

Laboratory experiments and theory show that fusion reactions produce neutrinos. Therefore, scientists predict that neutrinos should come from the Sun if fusion is occurring in its core. Theories predict how many and what type of neutrinos should be observed. Thus, the observations that confirm this prediction support the theory.

Answer to Question 2

C