Author Question: If we imagine the history of the universe compressed into one year, dinosaurs became extinct ... (Read 179 times)

ssal

  • Hero Member
  • *****
  • Posts: 572
If we imagine the history of the universe compressed into one year, dinosaurs became extinct ________.
 
  A) about an hour ago B) about 6 months ago
  C) about 3 weeks ago D) yesterday morning

Question 2

Why don't low-mass stars have the CNO cycle occurring in their cores?
 
  A) They don't have enough carbon, nitrogen, and oxygen.
  B) The CNO cycle makes elements heavier than carbon, nitrogen, and oxygen.
  C) Their core temperatures are too low.



marict

  • Sr. Member
  • ****
  • Posts: 304
Answer to Question 1

D

Answer to Question 2

C



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

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?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Did you know?

Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.

Did you know?

The average adult has about 21 square feet of skin.

Did you know?

There are more nerve cells in one human brain than there are stars in the Milky Way.

For a complete list of videos, visit our video library