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 43 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 shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.

Did you know?

Although not all of the following muscle groups are commonly used, intramuscular injections may be given into the abdominals, biceps, calves, deltoids, gluteals, laterals, pectorals, quadriceps, trapezoids, and triceps.

Did you know?

Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

Did you know?

Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.

Did you know?

Vaccines prevent between 2.5 and 4 million deaths every year.

Time Slows Down Near Matter Time Slows Down Near Matter
Test for Depressive Symptoms: CED Scale Test for Depressive Symptoms: CED Scale
In middle childhood, children spend increasing amounts of time with peers and friends. In middle childhood, children spend increasing amounts of time with peers and friends.
Press into points along the neck with your thumb, one side at a time. Apply circular friction to ... Press into points along the neck with your thumb, one side at a time. Apply circular friction to ...
Time homework Time homework
Plot of land (Part a) Plot of land (Part a)
Video: Structures that affect circulation - venous return

For a complete list of videos, visit our video library