« previous next »

Author Question: The average polarity interval between magnetic reversals over the last 15 million years has been ... (Read 71 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?

Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.

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.

Did you know?

Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.

Did you know?

Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.

Did you know?

In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.

Average winter rainfall and variation in rainfall among sites inhabited by Suromalus ater Average winter rainfall and variation in rainfall among sites inhabited by Suromalus ater
The Dingo was the first placental mammal introduced to Australia, around 4000 years ago The Dingo was the first placental mammal introduced to Australia, around 4000 years ago
Killer Whale - Size comparison to an average human. Killer Whale - Size comparison to an average human.
The skullcap from Trinil, Java is the type specimen for H. erectus and is about 900,000 years old. The skullcap from Trinil, Java is the type specimen for H. erectus and is about 900,000 years old.
The average weight gain between Thanksgiving and New Year's Day is about a pound The average weight gain between Thanksgiving and New Year's Day is about a pound
Americium-243 has a decay constant of 9.39 × 10-5 years-1. How long will it take Americium-243 has a decay constant of 9.39 × 10-5 years-1. How long will it take
Video: Causes of Acne

For a complete list of videos, visit our video library