Author Question: The gaseous oxygen in the Earth's atmosphere was produced as a by-product of A) volcanic ... (Read 91 times)

mspears3

  • Hero Member
  • *****
  • Posts: 586
The gaseous oxygen in the Earth's atmosphere was produced as a by-product of
 
  A) volcanic outgassing.
  B) photochemical reactions breaking down ozone (O3 ) to form oxygen (O2 ).
  C) photosynthesis.
  D) decay of organic matter.

Question 2

The deepest places in the ocean are those in which rifting occurs.
 
  Indicate whether the statement is true or false



ktidd

  • Sr. Member
  • ****
  • Posts: 319
Answer to Question 1

C

Answer to Question 2

FALSE



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.

Did you know?

Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

Did you know?

The average person is easily confused by the terms pharmaceutics and pharmacology, thinking they are one and the same. Whereas pharmaceutics is the science of preparing and dispensing drugs (otherwise known as the science of pharmacy), pharmacology is the study of medications.

Did you know?

Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.

Did you know?

About 80% of major fungal systemic infections are due to Candida albicans. Another form, Candida peritonitis, occurs most often in postoperative patients. A rare disease, Candida meningitis, may follow leukemia, kidney transplant, other immunosuppressed factors, or when suffering from Candida septicemia.

For a complete list of videos, visit our video library