« previous next »

Author Question: When atmospheric CO2 concentrations reach ________, scientists believe a possible climatic threshold ... (Read 44 times)

jlmhmf

  • Hero Member
  • *****
  • Posts: 552
on: Jul 14, 2018
When atmospheric CO2 concentrations reach ________, scientists believe a possible climatic threshold in which Earth systems could transition in a chaotic mode will be reached.
 
  A) 300 ppm B) 350 ppm C) 400 ppm D) 450 ppm E) 500 ppm

Question 2

Which of the following is the correct sequence from the surface to the bedrock in a typical soil horizon.
 
  A) O, A, E, B, C B) C, B, E, A, O C) S, O, I, L D) O, E, C, B, A E) A, B, C, O, R


softEldritch

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

D

Answer to Question 2

A


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

Did you know?

According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.

Did you know?

People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.

Did you know?

The familiar sounds of your heart are made by the heart's valves as they open and close.

Did you know?

In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.

But tortoises on lusher islands where grass is plentiful and the need to reach into trees not so fre But tortoises on lusher islands where grass is plentiful and the need to reach into trees not so fre
Atmospheric Optical Phenomena Atmospheric Optical Phenomena
Reverse pull-ups (palms up) from hip to armpit. Reach under the back and pull up with the fingertips ... Reverse pull-ups (palms up) from hip to armpit. Reach under the back and pull up with the fingertips ...
Social scientists have not done well at devising theories to explain lovely romantic moments Social scientists have not done well at devising theories to explain lovely romantic moments
Familial Risks for Multifactorial Threshold Traits Familial Risks for Multifactorial Threshold Traits
Threshold traits Threshold traits
Video: EpiPen Animation (Part 2)

For a complete list of videos, visit our video library