« previous next »

Author Question: The gaseous oxygen in the Earth's atmosphere was produced as a by-product of A) volcanic ... (Read 83 times)

mspears3

  • Hero Member
  • *****
  • Posts: 586
on: Jul 14, 2018
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
Reply #1 on: Jul 14, 2018
Answer to Question 1

C

Answer to Question 2

FALSE


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Limit intake of red meat and dairy products made with whole milk. Choose skim milk, low-fat or fat-free dairy products. Limit fried food. Use healthy oils when cooking.

Did you know?

The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.

Did you know?

Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

Did you know?

It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

Did you know?

According to the American College of Allergy, Asthma & Immunology, more than 50 million Americans have some kind of food allergy. Food allergies affect between 4 and 6% of children, and 4% of adults, according to the CDC. The most common food allergies include shellfish, peanuts, walnuts, fish, eggs, milk, and soy.

A double bond between two oxygen atoms A double bond between two oxygen atoms
A typical zirconia oxygen sensor. A typical zirconia oxygen sensor.
Connecting a handheld digital storage oscilloscope to an oxygen sensor signal wire. The use of the ... Connecting a handheld digital storage oscilloscope to an oxygen sensor signal wire. The use of the ...
Earth’s Spheres Earth’s Spheres
Exchange of Oxygen and Carbon Dioxide Exchange of Oxygen and Carbon Dioxide
Happy earth day jk kid drawing Happy earth day jk kid drawing
Video: Import of Dietary Glucose from Intestines to Bloodstream

For a complete list of videos, visit our video library