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

Author Question: Earth's atmosphere became oxygen rich about 2.45 ________ years ago. A) billion B) million C) ... (Read 54 times)

audragclark

  • Hero Member
  • *****
  • Posts: 579
on: Aug 22, 2018
Earth's atmosphere became oxygen rich about 2.45 ________ years ago.
 
  A) billion
  B) million
  C) trillion
  D) thousand

Question 2

All true oceanic islands are ________ in origin.
 
  A) collisional
  B) erosional
  C) metamorphic
  D) sedimentary
  E) volcanic


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jasonq

  • Sr. Member
  • ****
  • Posts: 335
Reply #1 on: Aug 22, 2018
Answer to Question 1

A

Answer to Question 2

E


audragclark

  • Member
  • Posts: 579
Reply 2 on: Aug 22, 2018
:D TYSM

phuda

  • Member
  • Posts: 348
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

Did you know?

By definition, when a medication is administered intravenously, its bioavailability is 100%.

Did you know?

The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

Did you know?

On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

Did you know?

About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.

Mars's average distance from the Sun is roughly 230 million km (1.5 AU) and its orbital period Mars's average distance from the Sun is roughly 230 million km (1.5 AU) and its orbital period
Quartz: the Silicon-Oxygen Mineral, SiO2 Quartz: the Silicon-Oxygen Mineral, SiO2
Earth Earth
On March 25, 1911, as scores of young factory girls leaped to their deaths from the eighth, ninth, a On March 25, 1911, as scores of young factory girls leaped to their deaths from the eighth, ninth, a
Distribution of Earth's Water Distribution of Earth's Water
Jamal plans to retire in 17 years. He is saving $2000 every start of the month in a retirement ... Jamal plans to retire in 17 years. He is saving $2000 every start of the month in a retirement ...
Video: Factors that increase metabolic rate and heat production

For a complete list of videos, visit our video library