Edzy
AI TutorResourcesToolsCompareBuy
SearchDownload AppLogin
Edzy

Edzy for Classes 6-12

Edzy is a personal AI tutor for CBSE and State Board students, with curriculum-aligned guidance, practice, revision, and study plans that adapt to each learner.

  • Email: always@edzy.ai
  • Phone: +91 96256 68472
  • WhatsApp: +91 96256 68472
  • Address: Sector 63, Gurgaon, Haryana

Follow Edzy

Browse by Class

  • CBSE Class 6
  • CBSE Class 7
  • CBSE Class 8
  • CBSE Class 9
  • CBSE Class 10
  • CBSE Class 11
  • CBSE Class 12
Explore the CBSE resource hub

Explore Edzy

  • Study Resources
  • Free Study Tools
  • Best Apps for Board Exams
  • Edzy vs ChatGPT
  • About Us
  • Why We Built Edzy
  • Blog
  • CBSE AI Tutor

Support & Legal

  • Help & FAQs
  • Accessibility
  • Privacy Policy
  • Terms & Conditions
  • Refund Policy
  • Cookie Policy
  • Site Directory

© 2026 Edzy. All rights reserved.

Curriculum-aligned learning paths for students in Classes 6-12.

TO
Question Practice

Which process contributed to the increase of oxygen in the oceans before it filled the atmosphere?

Attempt the question, check the explanation, and continue with similar questions to build confidence before exams.

MCQ_SA
CBSE
Class 11
Geography
Fundamentals of Physical Geography
The Origin and Evolution of the Earth
Question Bank

Which process contributed to t...

Single Answer MCQ
Q-00059652

Which process contributed to the increase of oxygen in the oceans before it filled the atmosphere?

1

Respiration

2

Photosynthesis

3

Evaporation

4

Condensation

Previous QuestionNext Question

Video Explanation

Answer

Solution:

Watch Video Solution

Login to get access

Keep Practising

Students who asked this also explored

Continue with nearby questions to strengthen the same chapter concept while you still have the context fresh in mind.

Q1.

Which hypothesis proposes that the Earth formed from a rotating cloud around a young sun?

Single Answer MCQ
View explanation
Q2.

Who is credited with reviving the Nebular Hypothesis in 1796?

Single Answer MCQ
View explanation
Q3.

What event does the Big Bang Theory describe?

Single Answer MCQ
View explanation
Q4.

How long ago did the Big Bang event occur according to current scientific understanding?

Single Answer MCQ
View explanation