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

Author Question: How can the ratios of oxygen isotopes be used to indicate past climate change? What marine substance ... (Read 25 times)

joe

  • Hero Member
  • *****
  • Posts: 627
on: Jul 15, 2018
How can the ratios of oxygen isotopes be used to indicate past climate change? What marine substance can be tested for its oxygen ratios?
 
  What will be an ideal response?

Question 2

Increasing amounts of CO2 in the atmosphere results in increased global temperatures.
 
  Indicate whether this statement is true or false.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

cegalasso

  • Sr. Member
  • ****
  • Posts: 295
Reply #1 on: Jul 15, 2018
Answer to Question 1

Answer: 16O and 18O both exist in seawater. Because 16O is lighter in weight, it will evaporate more readily from oceans. During glaciations, large volumes of water are evaporated from the oceans (and by extension, large quantities of 16O) and precipitated on land in the form of ice and snow, which creates glaciers. Therefore, the seawater becomes preferentially enriched in 18O, which is taken up by marine microorganisms when they create their shells. The higher the 18O content, the colder the climate.

Answer to Question 2

Answer: TRUE


joe

  • Member
  • Posts: 627
Reply 2 on: Jul 15, 2018
YES! Correct, THANKS for helping me on my review

sarah_brady415

  • Member
  • Posts: 328
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

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?

Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

Did you know?

Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.

Did you know?

Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.

Did you know?

Vaccines prevent between 2.5 and 4 million deaths every year.

The structure of climate diagrams. The structure of climate diagrams.
Thinking about Past Experiences While Asleep Thinking about Past Experiences While Asleep
Diamond and Oxygen Diamond and Oxygen
The second half of life brings a change from outward to inward concerns and from physical to ... The second half of life brings a change from outward to inward concerns and from physical to ...
Ogburn's Processes of Social Change Ogburn's Processes of Social Change
Ancient Climate Change Ancient Climate Change
Video: Effect of the environment on coat color in the Himalayan rabbit Animation

For a complete list of videos, visit our video library