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

Author Question: What does a comparison of meteorite abundances of metals with samples of Earth's mantle help ... (Read 4 times)

jman1234

  • Hero Member
  • *****
  • Posts: 560
on: Jul 16, 2018
What does a comparison of meteorite abundances of metals with samples of Earth's mantle help geochemists understand?
 
  A) the formation of crust through volcanic action
  B) the differentiation of Earth as it occurred after it formed
  C) the accretion of Earth from planetesimals
  D) the elements that have escaped Earth's gravity during its formation

Question 2

Present day heat flow from within Earth is twice as high as could be expected from radioactivity's contribution. This suggests that
 
  A) more radioactivity is occurring than what scientists have accounted.
  B) volcanic action contributes more than scientists presently understand.
  C) Earth used to be much hotter.
  D) movement within the core causes heating by friction.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

aliotak

  • Sr. Member
  • ****
  • Posts: 326
Reply #1 on: Jul 16, 2018
Answer to Question 1

Answer: B

Answer to Question 2

Answer: C


jman1234

  • Member
  • Posts: 560
Reply 2 on: Jul 16, 2018
Gracias!

Dominic

  • Member
  • Posts: 328
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Fatal fungal infections may be able to resist newer antifungal drugs. Globally, fungal infections are often fatal due to the lack of access to multiple antifungals, which may be required to be utilized in combination. Single antifungals may not be enough to stop a fungal infection from causing the death of a patient.

Did you know?

Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Did you know?

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

Did you know?

Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

Earth’s history is divided into nested sets of time--eons, eras, periods, and epochs--and is called Earth’s history is divided into nested sets of time--eons, eras, periods, and epochs--and is called
Comparison of Household, Apothecary, and Metric Liquid Measurements Comparison of Household, Apothecary, and Metric Liquid Measurements
Humans are related to Earth’s other organisms Humans are related to Earth’s other organisms
Comparison of the chromatin fibers with metaphase chromosomes Comparison of the chromatin fibers with metaphase chromosomes
Samples from the range of continuous variation in human eye color. Different alleles of more than on Samples from the range of continuous variation in human eye color. Different alleles of more than on
Eye Comparison Eye Comparison
Video: Mechanisms for chromosome movement Animation

For a complete list of videos, visit our video library