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

Author Question: Briefly explain why it is often difficult to assign a reliable numerical date to a sample of ... (Read 161 times)

moongchi

  • Hero Member
  • *****
  • Posts: 516
on: Jul 14, 2018
Briefly explain why it is often difficult to assign a reliable numerical date to a sample of sedimentary rock.
 
  What will be an ideal response?

Question 2

How does the area of Earth's surface covered by oceans compare with the area covered by continents?
 
  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

meltdown117

  • Sr. Member
  • ****
  • Posts: 326
Reply #1 on: Jul 14, 2018
Answer to Question 1

A sedimentary rock may include particles that contain radioactive isotopes, but the rock's age cannot be accurately determined because the grains that make up the rock are not the same age as the rock in which they occur. Rather, the sediments have been weathered from rocks of diverse ages.

Answer to Question 2

About 71 of Earth's surface is covered in oceans, compared to the remainder covered in continents.


moongchi

  • Member
  • Posts: 516
Reply 2 on: Jul 14, 2018
Wow, this really help

adf223

  • Member
  • Posts: 304
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

Studies show that systolic blood pressure can be significantly lowered by taking statins. In fact, the higher the patient's baseline blood pressure, the greater the effect of statins on his or her blood pressure.

Did you know?

After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

Did you know?

Vital signs (blood pressure, temperature, pulse rate, respiration rate) should be taken before any drug administration. Patients should be informed not to use tobacco or caffeine at least 30 minutes before their appointment.

Did you know?

The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.

Did you know?

Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

Sample communication analysis Sample communication analysis
Sample Exercise Prescription for Weight Training: Beginner Sample Exercise Prescription for Weight Training: Beginner
Sample of an insurance card. Sample of an insurance card.
Sample Advance Directive Sample Advance Directive
Explain how it can be desirable from an intertemporal perspective for a country run a current ... Explain how it can be desirable from an intertemporal perspective for a country run a current ...
The decay constant of radon-222 is 0.181 d-1. If a sample of radon initially contains 6.00 × ... The decay constant of radon-222 is 0.181 d-1. If a sample of radon initially contains 6.00 × ...
Video: Energy Flow - Trophic Levels and Food

For a complete list of videos, visit our video library