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

Author Question: The major impact in the Yucatan wiped out the dinosaurs: A) about 450 million years ago. B) ... (Read 72 times)

rachel9

  • Sr. Member
  • ****
  • Posts: 495
on: Jul 27, 2018
The major impact in the Yucatan wiped out the dinosaurs:
 
  A) about 450 million years ago.
  B) about 200 million years ago.
  C) about 65 million years ago.
  D) about 36 million years ago.
  E) less than 2 million years ago.

Question 2

What do we mean by the term molecular clouds? Why do they exist? How can observation of their properties yield clues to the processes of stellar formation?
 
  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

sylvia

  • Sr. Member
  • ****
  • Posts: 331
Reply #1 on: Jul 27, 2018
Answer to Question 1

C

Answer to Question 2

Molecular clouds are very cool interstellar gas clouds, cool enough that complex molecules can form. A shock wave, from an emission nebula or an exploding star, can lead to star formation in the molecular cloud.


rachel9

  • Member
  • Posts: 495
Reply 2 on: Jul 27, 2018
:D TYSM

isabelt_18

  • Member
  • Posts: 342
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.

Did you know?

Women are 50% to 75% more likely than men to experience an adverse drug reaction.

Did you know?

Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.

Did you know?

Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

Did you know?

A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

Discipline-specific training can take years to perfect. Discipline-specific training can take years to perfect.
Major Indian Cultures, AD 1–1500 Major Indian Cultures, AD 1–1500
During the Pullman strike in Chicago, workers protesting wage cuts did $340,000 in property damage, During the Pullman strike in Chicago, workers protesting wage cuts did $340,000 in property damage,
The major structures of the limbic system: amygdala, hippocampus, cingulate cortex, fornix, septum, ... The major structures of the limbic system: amygdala, hippocampus, cingulate cortex, fornix, septum, ...
Attributes of Major Energy Channels According to Traditional Chinese Medicine Attributes of Major Energy Channels According to Traditional Chinese Medicine
Did birds evolve from dinosaurs? Did birds evolve from dinosaurs?
Video: Steps of glucose catabolism

For a complete list of videos, visit our video library