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

Author Question: Earth's magnetic field is not stable; throughout geologic time it has changed direction. This change ... (Read 114 times)

torybrooks

  • Hero Member
  • *****
  • Posts: 500
on: Jul 29, 2018
Earth's magnetic field is not stable; throughout geologic time it has changed direction. This change is attributed to
 
  A) changes in the direction of fluid flow in the molten outer core of Earth.
  B) magnetic pole reversals.
  C) fluctuations in the time / space continuum.
  D) changes in the direction of fluid flow in the molten inner core of Earth.

Question 2

Body waves can be divided into two typesprimary waves and secondary waves. What is the difference between these two types of body waves?
 
  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

aadams68

  • Sr. Member
  • ****
  • Posts: 317
Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: A

Answer to Question 2

Answer: Primary waves, as their name suggests, are the first to register on a seismograph. P-waves are fast, longitudinal waves that move out in all directions from their source. Because both solids and liquids respond to compressional/expansional movement, P-waves can travel through any type of material. Secondary waves are slower than P-waves; as such they are the second to register on a seismograph. S-waves are transverse; they vibrate in an up-down, side-to-side fashion. Because liquids cannot support this type of movement, S-waves cannot travel through liquids.


torybrooks

  • Member
  • Posts: 500
Reply 2 on: Jul 29, 2018
Wow, this really help

nguyenhoanhat

  • Member
  • Posts: 332
Reply 3 on: Yesterday
Great answer, keep it coming :)

« 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?

The top 10 most important tips that will help you grow old gracefully include (1) quit smoking, (2) keep your weight down, (3) take supplements, (4) skip a meal each day or fast 1 day per week, (5) get a pet, (6) get medical help for chronic pain, (7) walk regularly, (8) reduce arguments, (9) put live plants in your living space, and (10) do some weight training.

Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Did you know?

Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

Did you know?

A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

A Snapshot of the Sun’s Global Magnetic Field A Snapshot of the Sun’s Global Magnetic Field
Meal Time Meal Time
Transdermal patch administration: (b) patch immediately applied to clean, dry, hairless skin and lab Transdermal patch administration: (b) patch immediately applied to clean, dry, hairless skin and lab
Global Climate Change Global Climate Change
Find the magnitude and the direction of the resultant vector of the vectors below. Find the magnitude and the direction of the resultant vector of the vectors below.
Earth’s tilt and yearly rotation around the sun cause seasonal effects. The 23° tilt of Earth’s ... Earth’s tilt and yearly rotation around the sun cause seasonal effects. The 23° tilt of Earth’s ...
Video: Interview with Person who has Schizophrenia

For a complete list of videos, visit our video library