This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: At the center of our Galaxy lies A) a quasar. B) a huge emission nebula. C) an intensely bright ... (Read 76 times)

misspop

  • Hero Member
  • *****
  • Posts: 540
on: Jul 27, 2018
At the center of our Galaxy lies
 
  A) a quasar.
  B) a huge emission nebula.
  C) an intensely bright visible superstar.
  D) the largest of all globular clusters.
  E) a black hole of millions of solar masses.

Question 2

What is the most abundant gas in the atmospheres of Mars and Venus? Explain why it is not as abundant in Earth's atmosphere.
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

macybarnes

  • Sr. Member
  • ****
  • Posts: 312
Reply #1 on: Jul 27, 2018
Answer to Question 1

E

Answer to Question 2

The carbon dioxide so abundant on our neighbors was first dissolved in the Earth's early water oceans, then deposited beneath them in carbonate rocks such as limestone. Also, photosynthesis took much of the remaining carbon dioxide and water and combined them to make carbohydrates and release oxygen into our unique atmosphere.


misspop

  • Hero Member
  • *****
  • Posts: 540
Reply #2 on: Jul 27, 2018
TY


macybarnes

  • Sr. Member
  • ****
  • Posts: 312
Reply #3 on: Jul 27, 2018
You're welcome


« previous next »
 

Did you know?

Famous people who died from poisoning or drug overdose include, Adolf Hitler, Socrates, Juan Ponce de Leon, Marilyn Monroe, Judy Garland, and John Belushi.

Did you know?

Pink eye is a term that refers to conjunctivitis, which is inflammation of the thin, clear membrane (conjunctiva) over the white part of the eye (sclera). It may be triggered by a virus, bacteria, or foreign body in the eye. Antibiotic eye drops alleviate bacterial conjunctivitis, and antihistamine allergy pills or eye drops help control allergic conjunctivitis symptoms.

Did you know?

Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

Did you know?

The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

Three of the color variants found at Fossil Rim Wildlife Center in Texas Three of the color variants found at Fossil Rim Wildlife Center in Texas
The Helix Nebula, NGC7293. The Helix Nebula, NGC7293.
Center of Mass of a Binary Star System Center of Mass of a Binary Star System
A whistle stop used to find top dead center. Remove the spark plug and install the whistle stop, ... A whistle stop used to find top dead center. Remove the spark plug and install the whistle stop, ...
Selective breeding of maze-bright and maze-dull strains of rats by Tryon (1934). (Data from Cooper, ... Selective breeding of maze-bright and maze-dull strains of rats by Tryon (1934). (Data from Cooper, ...
The responses of an on-center cell to contrast. The responses of an on-center cell to contrast.
Video: Bone cells and tissues - tissue composition and cells

For a complete list of videos, visit our video library