Carbonaceous chondrites are meteorites that have
a. never been melted since formation from solid particles in the solar nebula.
b. totally melted after formation.
c. been made from hydrogen and helium.
d. never entered Earth's atmosphere.
e. entered Earth's atmosphere but will be destroyed before reaching the ground.
Question 2
The Widmansttten patterns found in some meteorites show that the material
a. cooled very slowly.
b. cooled very rapidly.
c. was never heated to the point of being molten.
d. was molten just before it entered Earth's atmosphere.
e. is composed primarily of organic compounds.
The chemistry of polypeptide formation
Stony Meteorites
Atom formation
Mechanism of peptic ulcer formation
Summary of the formation, circulation, and absorption of cerebrospinal fluid (CSF)
Sagittal section through brain and spinal cord showing the reticular formation