Contrast the composition of asteroids with that of comets. ...

[leilurhhh]

Contrast the composition of asteroids with that of comets.
 
  What will be an ideal response?

Question 2

How does an accretion disk around a neutron star differ from an accretion disk around a white dwarf?
 
  A) The accretion disk around a neutron star is made mostly of helium while the accretion disk around a white dwarf is made mostly of hydrogen.
  B) The accretion disk around a neutron star is more likely to give birth to planets.
  C) The accretion disk around a neutron star is much hotter and emits higher-energy radiation.
  D) The accretion disk around a neutron star always contains much more mass.

[mochi09]

Answer to Question 1

Asteroids are rocky and/or metallic while comets are made of ice, with some dust or dirt (commonly described as dirty snowballs).

Answer to Question 2

C

[leilurhhh]

Excellent

[fatboyy09]

Gracias!