The region around Earth where the magnetic field traps charged ...

[schs14]

The region around Earth where the magnetic field traps charged particles is the
 
  A) ozone layer.
  B) exosphere.
  C) Van Allen Radiation Belts.
  D) corona.
  E) aurora borealis and australis.

Question 2

Describe the helium flash and why it occurs.
 
  What will be an ideal response?

[kthug]

Answer to Question 1

C

Answer to Question 2

When the core of a red giant has reached a temperature of 100 million K, helium fusion can occur. With helium fusion the temperature rises but the pressure does not because it is the electron degenerate pressure which is holding up the core and it is independent of the temperature. Increased pressure would expand the core and cool it but this does not happen. The increase in temperature makes the fusion occur faster, which raises the temperature more and produces a runaway explosion of fusion known as the helium flash.

[schs14]

Thanks for the timely response, appreciate it

[juliaf]

Wow, this really help