This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: The percentages of various gases in the atmosphere indicate that the composition of the atmosphere ... (Read 107 times)

erika

  • Hero Member
  • *****
  • Posts: 522
on: Jul 14, 2018
The percentages of various gases in the atmosphere indicate that the composition of the atmosphere is controlled
 
  A) totally by the amount and type of gases given off during volcanic eruptions.
  B) totally by the composition of comets and meteors that strike Earth.
  C) to a significant extent by biological processes occurring on Earth.
  D) exclusively by chemical reactions between sunlight and the gases in the atmosphere.

Question 2

Oxygen ( ) is
 
  A) a gas which principally originates from volcanic sources.
  B) a by-product of photosynthesis.
  C) one of the gases from Earth's earliest atmospheres.
  D) now measured at 78.084 by volume in the homosphere.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

pikon

  • Sr. Member
  • ****
  • Posts: 361
Reply #1 on: Jul 14, 2018
Answer to Question 1

C

Answer to Question 2

B


erika

  • Member
  • Posts: 522
Reply 2 on: Jul 14, 2018
:D TYSM

mochi09

  • Member
  • Posts: 335
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

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.

Did you know?

The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.

Did you know?

Inotropic therapy does not have a role in the treatment of most heart failure patients. These drugs can make patients feel and function better but usually do not lengthen the predicted length of their lives.

Did you know?

In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.

Did you know?

Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.

Regulation of Blood pH and Gases Regulation of Blood pH and Gases
The Atmosphere’s Oxygen Came from PhotosyntheticOrganisms The Atmosphere’s Oxygen Came from PhotosyntheticOrganisms
Average Chemical Composition of the Geosphere Crust Average Chemical Composition of the Geosphere Crust
Composition of the Atmosphere Composition of the Atmosphere
Weather maps: Pictures of the atmosphere Weather maps: Pictures of the atmosphere
The Composition Effect The Composition Effect
Video: Requirements for nervous signals

For a complete list of videos, visit our video library