Author Question: Currently, the greatest supply of natural gas in the United States is A) associated with ... (Read 24 times)

KimWrice

  • Hero Member
  • *****
  • Posts: 579
Currently, the greatest supply of natural gas in the United States is
 
  A) associated with petroleum deposits.
  B) in gas-rich shale.
  C) obtained by chemically converting petroleum into methane.
  D) in deposits of coal lying under Arizona and California.

Question 2

Which of the following best describes ecotones?
 
  A) They contain only species found in the bordering ecosystems.
  B) They have the same abiotic characteristics as the bordering ecosystems.
  C) They consist of many distinct landscapes.
  D) They are transitional regions between ecosystems and may contain unique species.



britb2u

  • Sr. Member
  • ****
  • Posts: 331
Answer to Question 1

B

Answer to Question 2

D



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Human kidneys will clean about 1 million gallons of blood in an average lifetime.

Did you know?

It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

Did you know?

Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.

Did you know?

Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.

Did you know?

The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

For a complete list of videos, visit our video library