How were conditions on the early Earth of more than 3 billion years ago different from those on today's Earth?
A) Only early Earth was intensely bombarded by large space debris.
B) Only early Earth had an oxidizing atmosphere.
C) Less ultraviolet radiation penetrated early Earth's atmosphere.
D) Early Earth's atmosphere had significant quantities of ozone.

Question

Quizplus · Accepted Answer

Early Earth was intensely bombarded by large space debris, which is not the case today. The atmosphere was reducing, not oxidizing, and lacked significant ozone, allowing more ultraviolet radiation to penetrate.

How Were Conditions on the Early Earth of More Than