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

Author Question: How have scientists been able to determine that Earth has a liquid metal outer core? What will be ... (Read 45 times)

mckennatimberlake

  • Hero Member
  • *****
  • Posts: 559
on: Jul 27, 2018
How have scientists been able to determine that Earth has a liquid metal outer core?
 
  What will be an ideal response?

Question 2

A open star cluster will have a(n) _____________ turn-off point than an older star cluster.
 
  Fill in the blank(s) with correct word


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

ambernicolefink

  • Sr. Member
  • ****
  • Posts: 359
Reply #1 on: Jul 27, 2018
Answer to Question 1

Geoscientists can use the arrival times of reflected and refracted seismic waves from distant earthquakes to construct a model of Earth's interior. Seismic waves from distant earthquakes pass through Earth, but a certain kind of wave, the S type, does not pass through the core. Because the S waves cannot move through a liquid, scientists conclude that Earth's core is partly liquid. Earth's magnetic field is further evidence of a liquid metallic core. The theory for the generation of magnetic fields, the dynamo effect, requires a moving, conducting liquid (for a planet) or gas (for a star) in the interior. If Earth's core were not partly a liquid metal, it would not be able to generate a magnetic field.

Answer to Question 2

blue
blueish
earlier


mckennatimberlake

  • Member
  • Posts: 559
Reply 2 on: Jul 27, 2018
YES! Correct, THANKS for helping me on my review

tandmlomax84

  • Member
  • Posts: 323
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

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?

In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.

Did you know?

Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%

Did you know?

In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

Did you know?

There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

Earth’s Spheres Earth’s Spheres
Friction significantly influences airflow near Earth’s surface, but its effect is negligible at ... Friction significantly influences airflow near Earth’s surface, but its effect is negligible at ...
How to determine an exponential relation from a table of values How to determine an exponential relation from a table of values
Outer Wall of The Flavian Amphitheater (Colosseum) Outer Wall of The Flavian Amphitheater (Colosseum)
Layers of Earth Layers of Earth
Earth 240 Million Years Ago Earth 240 Million Years Ago
Video: Endocytosis - pinocytosis, receptor mediated and Transcytosis

For a complete list of videos, visit our video library