« previous next »

Author Question: By radiometric dating, the oldest mineral in a sedimentary rock was found to be 1.4 million years ... (Read 68 times)

B

  • Hero Member
  • *****
  • Posts: 570
on: Jul 29, 2018
By radiometric dating, the oldest mineral in a sedimentary rock was found to be 1.4 million years old. What is the age of the sedimentary rock?
 
  A) 1.4 million years
  B) no older than 1.4 million years
  C) no younger than 1.4 million years
  D) Radiometric dating does not work for sedimentary rocks.

Question 2

In radioactive decay, when the parent material decays to one-quarter of its original amount, the time is
 
  A) one half-life.
  B) two half-lives.
  C) three half-lives.
  D) four half-lives.


matt

  • Sr. Member
  • ****
  • Posts: 344
Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: B

Answer to Question 2

Answer: B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

Did you know?

The average person is easily confused by the terms pharmaceutics and pharmacology, thinking they are one and the same. Whereas pharmaceutics is the science of preparing and dispensing drugs (otherwise known as the science of pharmacy), pharmacology is the study of medications.

Did you know?

Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).

Did you know?

The average office desk has 400 times more bacteria on it than a toilet.

Did you know?

There are 20 feet of blood vessels in each square inch of human skin.

(c) snow in Nunavut, alter the local albedo, causing altered microclimates. High albedos are found (c) snow in Nunavut, alter the local albedo, causing altered microclimates. High albedos are found
VESPR Chart. My favorite for many years VESPR Chart. My favorite for many years
Approximately 40 percent of farmers in the United States are 55 years old or older Approximately 40 percent of farmers in the United States are 55 years old or older
What rate, compounded once every 3 years, is equivalent to 9% effective rate? What rate, compounded once every 3 years, is equivalent to 9% effective rate?
We lost the 6th book in the series. After two months, we finally found it. We lost the 6th book in the series. After two months, we finally found it.
Video: Stroke volume

For a complete list of videos, visit our video library