[Answered] Earth's atmosphere became oxygen rich about 2.45 _______

This topic contains a solution. Click here to go to the answer

Author Question: Earth's atmosphere became oxygen rich about 2.45 ________ years ago. A) billion B) million C) ... (Read 60 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

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

Thanks for the timely response, appreciate it

Zebsrer

Member
Posts: 284

Reply 3 on: Yesterday

Great answer, keep it coming

« previous next »

Did you know?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

Did you know?

In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.

Did you know?

Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.

Did you know?

Common abbreviations that cause medication errors include U (unit), mg (milligram), QD (every day), SC (subcutaneous), TIW (three times per week), D/C (discharge or discontinue), HS (at bedtime or "hours of sleep"), cc (cubic centimeters), and AU (each ear).

Did you know?

Illicit drug use costs the United States approximately $181 billion every year.

Hand mnemonic for the basic atmosphere composition being 4/5 nitrogen and 1/5 oxygen.

Layers are deposited parallel to Earth’s surface. Younger layers are deposited on top of older layer

David P. Bradley (White Earth Oijbwe, and Mdewakaton Dakota), Indian Country Today.

School age (late childhood): 6–12 years, or to puberty.

Parenting Tips for Teen Years

Long-wave energy flux is emitted from Earth

Author Question: Earth's atmosphere became oxygen rich about 2.45 ________ years ago. A) billion B) million C) ... (Read 60 times)

audragclark

Earth's atmosphere became oxygen rich about 2.45 ________ years ago. A) billion B) million C) ...

Related Topics

Need homework help now?

jasonq

Earth's atmosphere became oxygen rich about 2.45 ________ years ago. A) billion B) million C) ...

audragclark

Zebsrer