« previous next »

Author Question: The average polarity interval between magnetic reversals over the last 15 million years has been ... (Read 70 times)

Charlie

  • Hero Member
  • *****
  • Posts: 640
on: Jul 16, 2018
The average polarity interval between magnetic reversals over the last 15 million years has been
 
  A) 20,000 years.
  B) 200,000 years.
  C) 2,000,000 years.
  D) 2,000 years.

Question 2

The magnetic north pole migrates about
 
  A) 40 km per decade.
  B) 40 cm per day.
  C) 40 m per month.
  D) 40 km per year.


helenmarkerine

  • Sr. Member
  • ****
  • Posts: 324
Reply #1 on: Jul 16, 2018
Answer to Question 1

Answer: B

Answer to Question 2

Answer: D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.

Did you know?

HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

Did you know?

Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

Did you know?

Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

This older woman is exploring new avenues of enjoyment as she avoids stagnation in her later years This older woman is exploring new avenues of enjoyment as she avoids stagnation in her later years
This portrait of Thomas Jefferson is considered an accurate likeness, painted when he was thirty-sev This portrait of Thomas Jefferson is considered an accurate likeness, painted when he was thirty-sev
During the Pullman strike in Chicago, workers protesting wage cuts did $340,000 in property damage, During the Pullman strike in Chicago, workers protesting wage cuts did $340,000 in property damage,
U.S. adults from 25 to 74 years report that the largest proportion of their daily stressors arise ... U.S. adults from 25 to 74 years report that the largest proportion of their daily stressors arise ...
Patients Older than 60 Years of Age Patients Older than 60 Years of Age
Earth 340 Million Years Ago Earth 340 Million Years Ago
Video: Egg and Sperm Formations in Animals Animation

For a complete list of videos, visit our video library