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 24 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?

Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

Did you know?

The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.

Did you know?

Glaucoma is a leading cause of blindness. As of yet, there is no cure. Everyone is at risk, and there may be no warning signs. It is six to eight times more common in African Americans than in whites. The best and most effective way to detect glaucoma is to receive a dilated eye examination.

Did you know?

Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.

Did you know?

Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.

Bow shock formed by the magnetosphere of LL Orionis (center) as it collides with the Orion Nebula fl Bow shock formed by the magnetosphere of LL Orionis (center) as it collides with the Orion Nebula fl
The two bright stars are (left) Alpha Centauri and (right) Beta Centauri. The two bright stars are (left) Alpha Centauri and (right) Beta Centauri.
The pituitary gland lies just underneath the brain. It is subdivided into anterior and posterior lob The pituitary gland lies just underneath the brain. It is subdivided into anterior and posterior lob
The proportion of obese and extremely obese adults in the United States has increased over the past The proportion of obese and extremely obese adults in the United States has increased over the past
Barred Spiral Galaxy Barred Spiral Galaxy
The mitochondrion is the center of energy transformation in the cell The mitochondrion is the center of energy transformation in the cell
Video: Role of transport in a cell

For a complete list of videos, visit our video library