Our Sun is considered to be a(n) ________. A) brown dwarf B) ...

[nramada]

Our Sun is considered to be a(n) ________.
 
  A) brown dwarf B) low-mass star
  C) high-mass star D) intermediate-mass star

Question 2

How do X-ray measurements help us measure the amount of dark matter in galaxy clusters?
 
  A) X-rays are emitted by hot gas, and the intracluster gas is heated by collisions with dark matter particles. More dark matter leads to greater heating, and hence stronger X-ray emission.
  B) Dark matter absorbs X-rays. Therefore, more dark matter leads to weaker X-ray emission from galaxy clusters.
  C) X-rays are emitted by hot gas, and the intracluster gas is heated by the gravitational effects of dark matter. More dark matter leads to greater heating, and hence stronger X-ray emission.

[javimendoza7]

Answer to Question 1

B

Answer to Question 2

C

[nramada]

YES! Correct, THANKS for helping me on my review

[helenmarkerine]

Gracias!