[Answered] When Earth was young, its atmosphere had no free ____. a. nitrogen b. oxygen c. helium d. carbon ...

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Author Question: When Earth was young, its atmosphere had no free ____. a. nitrogen b. oxygen c. helium d. carbon ... (Read 89 times)

fbq8i

Hero Member
Posts: 527

on: Jul 27, 2018

When Earth was young, its atmosphere had no free ____.

a. nitrogen
b. oxygen
c. helium
d. carbon dioxide
e. water vapor

Question 2

As a star like the Sun exhausts hydrogen in its core, the outer layers of the star become hotter and more luminous.

a. True
b. False
Indicate whether the statement is true or false

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Marked as best answer by a Subject Expert

gstein359

Sr. Member
Posts: 293

Reply #1 on: Jul 27, 2018

Answer to Question 1

b

Answer to Question 2

False

fbq8i

Member
Posts: 527

Reply 2 on: Jul 27, 2018

TYSM

raenoj

Member
Posts: 340

Reply 3 on: Yesterday

Wow, this really help

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