This topic contains a solution. Click here to go to the answer

Author Question: How has the chemical composition of the core of the Sun changed in the past 4.5 billion years? Are ... (Read 79 times)

jessicacav

  • Hero Member
  • *****
  • Posts: 558
How has the chemical composition of the core of the Sun changed in the past 4.5 billion years? Are earthlings (if any) likely to freeze in another 4-5 billion years? Explain.
 
  What will be an ideal response?

Question 2

Should we expect to find abundant amounts of gold and other rare-earth elements elsewhere in the universe?
 
  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

jaykayy05

  • Sr. Member
  • ****
  • Posts: 329
Answer to Question 1

The core of the Sun had an initial composition of 90 hydrogen and 9 helium. As hydrogen fusion has continued over the past 4.5 billion years the amount of helium produced has steadily increased. The center of the core now has about 85 helium and very little hydrogen. As a main sequence star the Sun will continue to brighten slowly. In another 4-5 billion years the Sun will have a core dominated by helium. This will force it to change into a red giant. Therefore, the Sun will only continue to brighten over time and the Earth will only get hotter, never colder.

Answer to Question 2

Gold, platinum, and other rare-earth elements are produced during the highly energetic, cataclysmic mergers of neutron stars. Because binary systems of neutron stars are rare, we do not expect an abundance of these elements.




jessicacav

  • Member
  • Posts: 558
Reply 2 on: Jul 27, 2018
Great answer, keep it coming :)


parker125

  • Member
  • Posts: 332
Reply 3 on: Yesterday
Gracias!

 

Did you know?

Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

Did you know?

Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.

Did you know?

On average, the stomach produces 2 L of hydrochloric acid per day.

Did you know?

All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

Did you know?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

For a complete list of videos, visit our video library