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 43 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
Gracias!

Joy Chen

  • Member
  • Posts: 354
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

Did you know?

Pink eye is a term that refers to conjunctivitis, which is inflammation of the thin, clear membrane (conjunctiva) over the white part of the eye (sclera). It may be triggered by a virus, bacteria, or foreign body in the eye. Antibiotic eye drops alleviate bacterial conjunctivitis, and antihistamine allergy pills or eye drops help control allergic conjunctivitis symptoms.

Did you know?

The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

Did you know?

Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.

Did you know?

More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.

The greenhouse effect: heat trapping by earth's atmosphere. The greenhouse effect: heat trapping by earth's atmosphere.
The Sun is the nearest star to Earth. The Sun is the nearest star to Earth.
Possible Earth 5 billion years from now Possible Earth 5 billion years from now
Common skin signs are often evidence of an illness or disorder. A fissure is a crack-like sore or ... Common skin signs are often evidence of an illness or disorder. A fissure is a crack-like sore or ...
Red rocks due to oxidation of iron near the surface Red rocks due to oxidation of iron near the surface
Earth’s Early Atmosphere Earth’s Early Atmosphere
Video: Nucleic acid digestion -small intestine

For a complete list of videos, visit our video library