Extinction, Russia-Ukraine War, IPCC Report, Groundwater: Down to Earth (DTE) 16-31 March 2022

Exam preparation @ https://www.doorsteptutor.com/Exams/

Lectures on Various Subjects like Science, Social Studies and Humanities subscribe https://www.youtube.com/c/TestPrep/

Examrace Lectures in Hindi subscribe https://www.youtube.com/c/ExamraceHindi/

For kids videos nursery to Class 5 subscribe https://www.youtube.com/c/FunProf/

For Science (Physics, Chemistry, Biology and Mathematics) Class 11-12 and important topics subscribe https://www.youtube.com/c/DoorstepTutor/

Also visit
NCERT Solutions, NIOS @ https://www.flexiprep.com/
IGCSE, A & AS Level @ https://www.examtestprep.com/

1st Extinction
 The Ordovician Era.
 443 million years ago.
 85% of all species went extinct.
 An “ice age” followed by a rapid warming are the reasons.
2nd Extinction
 The Devonian Age.
 374 million years ago.
 75% of all species went extinct.
 Fluctuating sea levels, altering global cooling and warming, drop in carbon dioxide concentration and periods of low oxygen.
3rd Extinction
 The Permian Age.
 250 million years ago.
 95% of all species went extinct.
 Reasons are an asteroid hit the planet, filling the air with pulverized particles, leading to inhabitable climate conditions.
4th Extinction
 The Late Triassic Age.
 200 million years ago.
 80% of all species went extinct.
 Reasons are some colossal geological activities in the today’s Atlantic Ocean that resulted in high carbon dioxide, global warming, and acidified oceans.
5th Extinction
 Cretaceous Period.
 65 million years ago.
 76% of all species went extinct.
 Reasons are Meteor crash in the Yucatan peninsula in Mexico, high volcanic activity.
6th Extinction
 The Holocene Epoch.
 In the previous five mass extinctions, about 99% of the planet’s species have been lost.
 Ongoing reasons are Anthropogenic factors like climate change and introduction of invasive plant species

upsc, cse, kaise kare upsc ki tayari, down to earth, upsc environment current affairs 2022, environment 2022, current affairs, cse down to earth, upsc 2022, cse 2022, ias 2022, upsc for beginners, upsc strategy, upsc preparation with job, upsc strategy, can upsc preparation be done at home, can i start upsc preparation at age of 25, upsc books unboxing, upsc books by toppers, right reference for upsc, ias psc factor, ias motivation videos, how to prepare for upsc, upsc with manishika jain, upsc examrace #examrace #upsc #ugcnet

Видео Extinction, Russia-Ukraine War, IPCC Report, Groundwater: Down to Earth (DTE) 16-31 March 2022 канала Examrace (UPSC, NET, NCERT, ICSE ...)