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

Author Question: What evidence from volcanic rocks indicates that Earth was much hotter in the past? What will be ... (Read 50 times)

LCritchfi

  • Hero Member
  • *****
  • Posts: 519
on: Jul 16, 2018
What evidence from volcanic rocks indicates that Earth was much hotter in the past?
 
  What will be an ideal response?

Question 2

Write a short paragraph in which you use the analogies of a bottle of salad dressing and hand clapping to explain planetary differentiation to a friend or family member who is unfamiliar with the concept.
 
  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

Sierray

  • Sr. Member
  • ****
  • Posts: 343
Reply #1 on: Jul 16, 2018
Answer to Question 1

Ultramafic lava flows require mantle temperatures several hundred degrees hotter than our estimates of the present day mantle temperatures. These ultramafic lava flows are all greater than 3 billion years old.

Answer to Question 2

A bottle of salad dressing contains oil and vinegar, which do not mix unless they are shaken together. Over time, the oil and vinegar separate, with the denser vinegar on the bottom. This is analogous to how molten metal would separate from molten silicate.


LCritchfi

  • Member
  • Posts: 519
Reply 2 on: Jul 16, 2018
:D TYSM

irishcancer18

  • Member
  • Posts: 310
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

Did you know?

According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.

Did you know?

As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.

Did you know?

The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.

Did you know?

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

Past and Future Use of Aggregate Past and Future Use of Aggregate
American soldiers advance past a burning oil well. As the routed Iraqi army fled Kuwait, it ignited ... American soldiers advance past a burning oil well. As the routed Iraqi army fled Kuwait, it ignited ...
Benvenuto Cellini, Saltcellar: Neptune (Sea) and Tellus (Earth). Benvenuto Cellini, Saltcellar: Neptune (Sea) and Tellus (Earth).
Serum protein electrophoresis gel of 10 sera. Lanes 1, 2, 3, 5, 8, and 9 show evidence of an ... Serum protein electrophoresis gel of 10 sera. Lanes 1, 2, 3, 5, 8, and 9 show evidence of an ...
Boys Climbing Rocks And Diving, Tomb Of Hunting And Fishing Boys Climbing Rocks And Diving, Tomb Of Hunting And Fishing
Early Earth Early Earth
Video: Brain Anatomy Animation (Part 2 of 2)

For a complete list of videos, visit our video library