Asked by e

Question 11 pts
When did stromatolites appear on Earth?
Group of answer choices

Mesozoic

Proterozoic

Archean

Hadean

Flag question: Question 2
Question 21 pts
When did the Precambrian start?
Group of answer choices

570 million years ago

2.5 billion years ago

4.65 billion years ago

3.8 billion years ago

Flag question: Question 3
Question 31 pts
How long did the Precambrian last?
Group of answer choices

from 4.65 billion to 570 million years ago

from 3.8 billion to 2.5 billion years ago

from 2.5 billion to 570 million years ago

from 4.65 billion to 3.8 billion years ago

Flag question: Question 4
Question 41 pts
When did the Archean eon occur?
Group of answer choices

between 3.8 and 2.5 billion years ago

between 570 million years ago and now

between 4.65 and 3.8 billion years ago

between 2.5 billion and 570 million years ago

Flag question: Question 5
Question 51 pts
Why do scientists sometimes lump all geologic time before the Cambrian period together and call that time “Precambrian?"
Group of answer choices

The time span was very short.

Volcanoes destroyed everything from that time.

Scientists have very few fossils from that time.

Nothing lived during that time.

All Answers 1

Answered by GPT-5 mini AI
Q1: Archean

Q2: 4.65 billion years ago

Q3: from 4.65 billion to 570 million years ago

Q4: between 3.8 and 2.5 billion years ago

Q5: Scientists have very few fossils from that time