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

Author Question: Why is zoic part of so many names on the geologic time scale? What will be an ideal ... (Read 110 times)

charchew

  • Hero Member
  • *****
  • Posts: 579
on: Jul 14, 2018
Why is zoic part of so many names on the geologic time scale?
 
  What will be an ideal response?

Question 2

Why is radiometric dating a reliable method for determining numerical dates?
 
  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

ricroger

  • Sr. Member
  • ****
  • Posts: 352
Reply #1 on: Jul 14, 2018
Answer to Question 1

Zoic refers to life, and because fossils were used to differentiate Earth history for the most part, zoic is an appropriate ending for the names of the divisions.

Answer to Question 2

The rates of decay for many isotopes have been precisely measured and do not vary under the physical conditions that exist in Earth's outer layers. Therefore, each radioactive isotope used for dating has been decaying at a fixed rate ever since the formation of the rocks in which it occurs, and the products of decay have been accumulating at a corresponding rate.


charchew

  • Hero Member
  • *****
  • Posts: 579
Reply #2 on: Jul 14, 2018
Thank you


ricroger

  • Sr. Member
  • ****
  • Posts: 352
Reply #3 on: Jul 14, 2018
No problemo


« previous next »
 

Did you know?

The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

Did you know?

Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.

Did you know?

In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

Did you know?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

Did you know?

After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.

Tanner Scale Tanner Scale
Time Estimates for Specific Office Procedures Cont. Time Estimates for Specific Office Procedures Cont.
How to solve optimization problems in calculus (Part 2) How to solve optimization problems in calculus (Part 2)
Large-scale circulation systems produce global climate patterns Large-scale circulation systems produce global climate patterns
Determining Richter Scale Magnitude Determining Richter Scale Magnitude
Part 2 Part 2
Video: Cardiac Cycle (Part 4 of 4)

For a complete list of videos, visit our video library