Top Posters
Since Sunday
w
3
w
3
e
3
3
r
3
g
2
2
b
2
M
2
V
2
f
2
c
2
Home Q & A Board Science-Related Homework Help Physics
New Topic  
symbo symbo
wrote...
Go to Answer
Posts: 1970
Rep: 2 0
7 years ago
On the question of the existence of water on the planet Mars, present evidence indicates that


(a)   there has been significant water flow in the past, some water ice exists at the poles at present, and water may exist now as permafrost under the Martian surface.
(b)   there is not and probably never has been water on Mars. It is an arid, dusty and dry planet where any water present at the planet's formation would have rapidly evaporated or combined with iron to form iron oxides (rust).
(c)   there is liquid water on the planet surface which flows along flood channels and canals during the summer months, the dampness producing changes in the color and shading of the planet which are seen through telescopes on Earth.
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
Authors:
Read 83 times
2 Replies
Replies
Answer verified by a subject expert
discovererdiscoverer
wrote...
#1
Top Poster
Posts: 1374
Rep: 30 0
7 years ago
Sign in or Sign up in seconds to unlock everything for free
More solutions for this book are available here
1

Related Topics

symbo Author
wrote...
#2
7 years ago
Very informative, I appreciate the extra effort
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  2802 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Related Images
  
 541
  
 199
  
 1046
Your Opinion
What's your favorite math subject?
Votes: 559
Previous poll results: Who will win the 2024 president election?