« previous next »

Author Question: When several cirque glaciers gauge an individual mountain summit from all sides, a pyramidal peak ... (Read 11 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?

Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

Did you know?

The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

Did you know?

Common abbreviations that cause medication errors include U (unit), mg (milligram), QD (every day), SC (subcutaneous), TIW (three times per week), D/C (discharge or discontinue), HS (at bedtime or "hours of sleep"), cc (cubic centimeters), and AU (each ear).

Did you know?

Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

Did you know?

A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

Only 750 mountain gorillas remain in two tiny forests in East Africa. Only 750 mountain gorillas remain in two tiny forests in East Africa.
Connect a fuelpressure gauge to the fuel rail at the Schrader valve. Connect a fuelpressure gauge to the fuel rail at the Schrader valve.
Testing fuel-pump volume using a fuelpressure gauge with a bleed hose inserted into a suitable ... Testing fuel-pump volume using a fuelpressure gauge with a bleed hose inserted into a suitable ...
Rolling on the arm. Hands on opposite sides of the arm compress and roll the soft tissues and create ... Rolling on the arm. Hands on opposite sides of the arm compress and roll the soft tissues and create ...
Reach from behind to apply circular friction to the temples on both sides. Reach from behind to apply circular friction to the temples on both sides.
A lesion called a plaque in the brain of an individual with Alzheimer disease. A ring of degeneratin A lesion called a plaque in the brain of an individual with Alzheimer disease. A ring of degeneratin
Video: Types of synapses - electrical & chemical

For a complete list of videos, visit our video library