Author Question: Why do igneous rocks yield the most accurate radiometric ages, and what is the calculated date the ... (Read 111 times)

Frost2351

  • Hero Member
  • *****
  • Posts: 557

Why do igneous rocks yield the most accurate radiometric ages, and what is the calculated date the
  actual age of? What will be an ideal response?



Question 2

If you start with an element with 1,000,000 parent atoms, how many parents and how many daughters
  will there be after 6 half-lives? What will be an ideal response?




meganlapinski

  • Sr. Member
  • ****
  • Posts: 333
Answer to Question 1

As magma cools and begins to crystallize, radioactive parent atoms are separated from previously
formed daughter atoms. Some radioactive parent atoms are incorporated into the crystal structure of
certain minerals, but the stable daughter atoms are a different size and cannot fit into the crystal
structure of the same mineral as the parent atoms. Therefore, these minerals will contain radioactive
parent atoms but no stable daughter atoms. The time being measured is the time of crystallization of
the mineral that contains the radioactive atoms, which is the time when the magma was cooling.



Answer to Question 2

0: P=1,000,000, D=0; 1: P=500,000, D=500,000; 2: P=250,000, D=750,000; 3: P=125,000,
D=875,000; 4: P=62,5000, D=937,500; 5: P=31,250; D=968,750; 6: P=15,625, D=984,315.




Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Asthma attacks and symptoms usually get started by specific triggers (such as viruses, allergies, gases, and air particles). You should talk to your doctor about these triggers and find ways to avoid or get rid of them.

Did you know?

The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

Did you know?

Glaucoma is a leading cause of blindness. As of yet, there is no cure. Everyone is at risk, and there may be no warning signs. It is six to eight times more common in African Americans than in whites. The best and most effective way to detect glaucoma is to receive a dilated eye examination.

Did you know?

The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

Did you know?

Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.

For a complete list of videos, visit our video library