The principal constituent of the atmosphere of the Earth is? a) Oxygen b) Carbon c) Hydrogen d) NitrogenΒ About 78% of the Earth’s atmosphere is composed of nitrogen. γππππππππγ This Page in PDF File NOW!!! Read more articles Previous PostThe SI unit of electric current is? Next PostWhat is Dry Ice? Leave a Reply Cancel replyCommentEnter your name or username to comment Enter your email address to comment Enter your website URL (optional) Save my name, email, and website in this browser for the next time I comment. Δ You Might Also Like Carrot is a Good Source of which Vitamin? December 2, 2022 What is the outer surface of the sun called? March 10, 2023 The SI unit of “pressure” is: January 20, 2023 The most abundant element in the Earth’s crust: January 20, 2023 Who discovered penicillin in 1928? March 28, 2023 A barometer is an instrument used to measure: February 23, 2023