« previous next »

Author Question: When several cirque glaciers gauge an individual mountain summit from all sides, a pyramidal peak ... (Read 23 times)

justinmsk

  • Hero Member
  • *****
  • Posts: 524
on: Jul 14, 2018
When several cirque glaciers gauge an individual mountain summit from all sides, a pyramidal peak known as a ________ results.
 
  A) col
  B) horn
  C) hanging valley
  D) artes

Question 2

How have scientists used isotopic analysis to determine the rise of atmospheric CO2 is mostly from the burning of fossil fuels?
 
  A) Since 14C is an unstable isotope, scientists have dated the atmospheric carbon to the period since the Industrial Revolution.
  B) Both coal and oil contain a high proportion of 14C. By analyzing, 14C/12C ratios, scientists have been able to determine the source based on this fact.
  C) The low proportions of 13C and 14C within atmospheric CO2 indicates the source is fossil carbon.
  D) 14C concentrations are much higher in urban areas than in rural areas, indicating fossil fuels must have a higher 14C/12C ratio than carbon from other sources.


laurnthompson

  • Sr. Member
  • ****
  • Posts: 334
Reply #1 on: Jul 14, 2018
Answer to Question 1

B

Answer to Question 2

C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.

Did you know?

Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%

Did you know?

About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.

Did you know?

Blastomycosis is often misdiagnosed, resulting in tragic outcomes. It is caused by a fungus living in moist soil, in wooded areas of the United States and Canada. If inhaled, the fungus can cause mild breathing problems that may worsen and cause serious illness and even death.

Did you know?

Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.

Mountain Cur Mountain Cur
Mountain View Cur Mountain View Cur
Genetics of Widow's Peak Genetics of Widow's Peak
Why did these young volunteers of the First Virginia Militia join the Confederate army in 1861? “It Why did these young volunteers of the First Virginia Militia join the Confederate army in 1861? “It
One way to illustrate the journey of adulthood is with the image of a mountain landscape. One begins ... One way to illustrate the journey of adulthood is with the image of a mountain landscape. One begins ...
Stroke alongside the nose and under the cheekbones. Use the thumbs to slide down the sides of the ... Stroke alongside the nose and under the cheekbones. Use the thumbs to slide down the sides of the ...
Video: Brain Lobes Animation

For a complete list of videos, visit our video library