« previous next »

Author Question: A high 18 oxygen/16 oxygen ratio in the shells of marine animals indicates __________. a. colder ... (Read 99 times)

abarnes

  • Hero Member
  • *****
  • Posts: 556
on: Jul 10, 2018
A high 18 oxygen/16 oxygen ratio in the shells of marine animals indicates __________.
 
  a. colder temperatures and lower sea levels
  b. higher temperatures and lower sea levels
  c. colder temperatures and higher sea levels
  d. warmer temperatures and higher sea levels

Question 2

Crystalline materials that have been buried in sediments may be chronometrically dated using the __________ method.
 
  a. electron spin resonance
  b. stratigraphic
  c. optically stimulated luminescence
  d. paleomagnetism


strudel15

  • Sr. Member
  • ****
  • Posts: 324
Reply #1 on: Jul 10, 2018
Answer to Question 1

Correct Answer: a

Answer to Question 2

Correct Answer: c


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

Did you know?

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

Did you know?

Over time, chronic hepatitis B virus and hepatitis C virus infections can progress to advanced liver disease, liver failure, and hepatocellular carcinoma. Unlike other forms, more than 80% of hepatitis C infections become chronic and lead to liver disease. When combined with hepatitis B, hepatitis C now accounts for 75% percent of all cases of liver disease around the world. Liver failure caused by hepatitis C is now leading cause of liver transplants in the United States.

Did you know?

Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.

Did you know?

As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.

Bivalve shells have growth rings. Bivalve shells have growth rings.
Selected High-Risk Drugs for Older Adults Selected High-Risk Drugs for Older Adults
A gasoline direct-injection system injects fuel under high pressure directly into the combustion ... A gasoline direct-injection system injects fuel under high pressure directly into the combustion ...
The flammable range consists of the concentration of fuel that will burn in atmospheric oxygen—the ... The flammable range consists of the concentration of fuel that will burn in atmospheric oxygen—the ...
The coefficient of the restitution of an object is defined as the ratio of its outgoing to ... The coefficient of the restitution of an object is defined as the ratio of its outgoing to ...
Male to Female Sex Ratio at Birth vs. PCB Concentration in Maternal Serum Male to Female Sex Ratio at Birth vs. PCB Concentration in Maternal Serum
Video: The 4 steps of translation Animation

For a complete list of videos, visit our video library