On early Earth, more than 4 billion years ago, environmental conditions were very different from those today because On early Earth, more than 4 billion years ago, environmental conditions were very different from those today because early Earth's atmosphere had significant quantities of ozone. only early Earth was intensely bombarded by large rocks and ice from space. only early Earth had an oxidizing atmosphere. less ultraviolet radiation penetrated early Earth's atmosphere.

Only early Earth was intensely bombarded by large rocks and ice from space.

Explanation:

Primitive Earth was hit several times by meteors, meteorites, rocks and ice from space. The impact of these bombings was very intense and it modified the entire structure and resources of the earth, besides harming life in general. The extinction of the dinosaurs was a result of this bombardment, for example, but there were many mass extinctions whenever one of these elements hit the planet. Another result was the modification of environmental conditions, which were very different from what we know today.