« previous next »

Author Question: When atmospheric CO2 concentrations reach ________, scientists believe a possible climatic threshold ... (Read 46 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?

Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.

Did you know?

The Centers for Disease Control and Prevention has released reports detailing the deaths of infants (younger than 1 year of age) who died after being given cold and cough medications. This underscores the importance of educating parents that children younger than 2 years of age should never be given over-the-counter cold and cough medications without consulting their physicians.

Did you know?

The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.

Did you know?

Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.

Did you know?

In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

The effects of deforestation on nutrient concentrations. The effects of deforestation on nutrient concentrations.
The concept of a threshold stimulus. The concept of a threshold stimulus.
The Upper Troposphere: Atmospheric Rivers The Upper Troposphere: Atmospheric Rivers
The Method for Determining the Two-Point Discrimination Threshold The Method for Determining the Two-Point Discrimination Threshold
Atmospheric currents carried radioactive fallout across much of Northern Hemisphere Atmospheric currents carried radioactive fallout across much of Northern Hemisphere
Video: Lipid catabolism ( ketogenesis and oxidation of glycerol) and Lipid anabolism (lipogenesis)

For a complete list of videos, visit our video library