× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
k
3
r
3
j
3
V
3
l
3
2
J
2
1
2
n
2
O
2
h
2
d
2
Home Q & A Board Science-Related Homework Help Physics Astronomy
New Topic  
BurningAshe BurningAshe
wrote...
Go to Answer
Posts: 483
Rep: 0 0
6 years ago
Cepheid variable stars have pulsation periods of _____.
 
  A) 1 to 60 days
  B) 80 to 140 days
  C) 150 to 210 days
  D) 230 to 290 days

Question 2

According to astronomers, the Milky Way is _____.
 
  A) wheel shaped
  B) hexagonal
  C) rectangular
  D) bell shaped

Question 3

Identify a true statement about the atoms in the Universe.
 
  A) Most of the iron in your body was produced by nuclear fission reactions.
  B) Most of the calcium atoms in your bones were assembled inside stars.
  C) The iodine atoms were not formed during the violent deaths of rare massive stars.
  D) The gold and silver atoms are more than 10 billion years old.

Question 4

The disk component of the Milky Way Galaxy has an overall relatively _____ color.
 
  A) red
  B) orange
  C) yellow
  D) blue

Question 5

As per the turnoff point in the cluster H-R diagram, the oldest open clusters in the Milky Way have ages of about _____.
 
  A) 2 to 4 billion years
  B) 5 to 7 billion years
  C) 9 to 10 billion years
  D) 12 to 13 billion years

Question 6

_____ is the rate at which a star moves across the sky.
 
  A) Proper motion
  B) Reflective motion
  C) Reflex motion
  D) Intrinsic motion
Read 51 times
1 Reply
Replies
Answer verified by a subject expert
IRIS123456IRIS123456
wrote...
#1
Top Poster
Posts: 517
Rep: 1 0
6 years ago
Sign in or Sign up in seconds to unlock everything for free
1

Related Topics

BurningAshe Author
wrote...

6 years ago
Thanks
oscar520000
wrote...

Yesterday
Good timing, thanks!
IvanaVR
wrote...

2 hours ago
I appreciate what you did here, answered it right Smiling Face with Open Mouth
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  991 People Browsing
 108 Signed Up Today
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 888
  
 582
  
 1478
Your Opinion
What's your favorite coffee beverage?
Votes: 299
Previous poll results: What's your favorite math subject?