fanburger4
fanburger4 fanburger4
  • 02-01-2019
  • Physics
contestada

The Chemical make-up of Earth's atmosphere during the cretaceous period

Respuesta :

Shua123
Shua123 Shua123
  • 02-01-2019

There are indications that the cretaceous atmosphere may have been much richer in oxygen. Today, Earth's atmosphere contains about 77% nitrogen, 21% oxygen, 1% water vapor, 0.9% argon, and 0.03% carbon dioxide, with traces of about a dozen other gases.

Answer Link

Otras preguntas

inequality x is no less than -2
Which products went from New England to the West Indies in the Triangular Trade? A) fish, lumber, and furs B) sugar, molasses, and fruit C) manufactured goods D
Marisa is counting wheels on bicycles and tricycles at the park. She coounted 3 vehicles and 7 wheels. How many bicycles and how many tricycles did Marisa see?
What are the four ways that most traits are inherited?
A secretary at the police department makes $8 less per hour than the dispatcher. The combined hourly wage of the secretary and the dispatcher is $40. Which
how does mcdonald's use vertical integration
Both the experimental group and the control group are exposed to the same __________.
relative poverty is ________
why did the French expect native Americans to side with them ?
Which activity is the best choice for a lifelong fitness program?