Which of the following gases was most likely present in Earth's earliest atmosphere?

a. nitrogen
b.hydrogen
c.argon
d.oxygen

Help me please!

1: B

2:B
3:A
4:B
5:B
6:True
7:False
8:Essay wright in your own words.
9:Essay (AGAIN)
10: Another ESSAY!

You will get 100% on the Early earth quiz I promise!! I did it and got 100% Thankyou!!

r u in connections acedemy?

Why tf did they feel 3 written questions were needed

Ya i am in 8th grade and in connexes too!

hydrogen

is foxgirl right?

Foxgirl is correct thankyou!

b

b
a
b
b
true
false
8,9 and 10 YOU ARE GONE TO HAVE TO DO BY YOURSELF BUT YOU GOT THIS :)

For Scince!

For number 8 what I did was google the definition of mold and cast and then said they were related because you have to have a mold to make a cast!