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

Author Question: Briefly describe the star-gas-star cycle. What will be an ideal ... (Read 28 times)

james

  • Hero Member
  • *****
  • Posts: 573
on: Jul 27, 2018
Briefly describe the star-gas-star cycle.
 
  What will be an ideal response?

Question 2

Suppose it is full Moon. What phase of Earth would someone on the Moon see at this time?
 
  A) Full Earth
  B) New Earth
  C) First quarter Earth
  D) Earth does not go through phases as seen from the Moon.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Melissahxx

  • Sr. Member
  • ****
  • Posts: 304
Reply #1 on: Jul 27, 2018
Answer to Question 1

During a star's lifetime, it fuses hydrogen into helium and helium into carbon. If it is more massive, it also creates heavier elements, up to iron, by fusion, and even heavier elements, up to uranium, during a supernova event. When the star ends its life as a planetary nebula or in a supernova explosion, it disperses these elements into the interstellar medium. The interstellar medium thus gains these heavier elements and has a smaller proportion of hydrogen but a larger proportion of heavier elements than it did before. The interstellar medium cools, forms molecular clouds, and then forms new stars, which are made out of the material of the interstellar medium.

Answer to Question 2

B


james

  • Member
  • Posts: 573
Reply 2 on: Jul 27, 2018
Gracias!

jomama

  • Member
  • Posts: 346
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

Did you know?

The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.

Did you know?

As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

Did you know?

Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.

Did you know?

Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.

The calvin cycle The calvin cycle
Mass Loss from a Supermassive Star Mass Loss from a Supermassive Star
Serotonin and the Sleep–Waking Cycle Serotonin and the Sleep–Waking Cycle
A free-running circadian sleep–wake cycle 25.3 hours in duration. Despite living in an unchanging ... A free-running circadian sleep–wake cycle 25.3 hours in duration. Despite living in an unchanging ...
Life Cycle Nutrition: Pregnancy through Infancy Life Cycle Nutrition: Pregnancy through Infancy
The life cycle of Chlamydomonas The life cycle of Chlamydomonas
Video: Plant Defense Mechanisms from Pathogens

For a complete list of videos, visit our video library