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 40 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!

nyrave

  • Member
  • Posts: 344
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.

Did you know?

Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.

Did you know?

A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates's recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

About 100 new prescription or over-the-counter drugs come into the U.S. market every year.

Volcanic plateaus (red) and impact basins (blue) dominate this topographic map of Mars Volcanic plateaus (red) and impact basins (blue) dominate this topographic map of Mars
Rivers on Mars and Earth Rivers on Mars and Earth
How Orbital Eccentricity Changes the Amount of Solar Radiation Earth Receives How Orbital Eccentricity Changes the Amount of Solar Radiation Earth Receives
El Anatsui, Between Earth and Heaven. El Anatsui, Between Earth and Heaven.
The rock cycle and the Earth’s physical environment The rock cycle and the Earth’s physical environment
How many electrons flow past a given cross section of the wire in 10.3 min? electrons How many electrons flow past a given cross section of the wire in 10.3 min? electrons
Video: Fermentation - When Oxygen Is Absent, Pyruvate to Lactate & Pyruvate to Ethanol

For a complete list of videos, visit our video library