Top Posters
Since Sunday
e
5
e
4
4
d
4
o
3
p
3
t
3
3
m
3
p
3
m
3
f
3
Home Q & A Board Science-Related Homework Help Physics
New Topic  
killian killian
wrote...
Go to Answer
Silver Member
Posts: 6024
Rep: 33 0
10 years ago
Which of the following gives the two main assumptions of theoretical models of galaxy evolution?
A) The beginning of the universe is modeled after a supernova explosion, and all elements were produced by this exploding star.
B) Hydrogen and helium filled all of space, and certain regions of the universe were slightly denser than others.
C) Hydrogen and helium filled all of space, and the entire universe had exactly the same density everywhere.
D) The universe has always been expanding, and denser areas contracted to form the first stars.
E) The universe was composed originally only of hydrogen, and all the other elements came from stars.
Read 560 times
2 Replies
Smiling Face with Open Mouth
Replies
Answer accepted by topic starter
padrepadre
wrote...
#1
Staff Member
Educator
Top Poster
Posts: 21608
Rep: 4541 17
10 years ago
Sign in or Sign up in seconds to unlock everything for free
1
Mastering in Nutritional Biology
Tralalalala Slight Smile

Related Topics

wrote...
#2
Educator
10 years ago
Thanks sir
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  945 People Browsing
 118 Signed Up Today
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 254
  
 163
  
 1469
Your Opinion
Which industry do you think artificial intelligence (AI) will impact the most?
Votes: 352
Previous poll results: How often do you eat-out per week?