8.- Beginnings of life

Question 1 of 6

21

What is the name of the first Eon?

Select one or more of the following:

Hades
Hadean
Proterozoic

Explanation

Question 2 of 6

21

Why was this eon inhospitable?

Select one or more of the following:

There were lava flowing all around
There was not oxygen
There were bodies impacting the Earth from the space

Explanation

Question 3 of 6

21

What was the name of the protoplanet that rammed into the Earth to form the Moon?

Select one or more of the following:

Thera
Theia
Gea

Explanation

Question 4 of 6

21

Why Late Heavy Bombardment is so important for the beginning of life?

Select one or more of the following:

Because it brought microscopic living things to our planet
Because it permitted life to develop more quickly
Because it was the start up of life on earth

Explanation

Question 5 of 6

21

What caused the Late Heavy Bombardment?

Select one or more of the following:

Nobody knows it
A change in the orbits of Uranus and Neptune
The explosion of a protoplanet

Explanation

Question 6 of 6

21

When scientists estimate life first appeared?

Select one or more of the following:

3.824 billion years ago
8.324 billion years ago
3.428 billion years ago

	Created by PEDRO ALVAREZ JIMENEZ over 9 years ago

https://www.khanacademy.org/science/cosmology-and-astronomy/life-earth-universe/history-life-earth-tutorial/v/beginnings-of-life

8.- Beginnings of life

8.- Beginnings of life

Question 1 of 6

What is the name of the first Eon?

Select one or more of the following:

Explanation

Question 2 of 6

Why was this eon inhospitable?

Select one or more of the following:

Explanation

Question 3 of 6

What was the name of the protoplanet that rammed into the Earth to form the Moon?

Select one or more of the following:

Explanation

Question 4 of 6

Why Late Heavy Bombardment is so important for the beginning of life?

Select one or more of the following:

Explanation

Question 5 of 6

What caused the Late Heavy Bombardment?

Select one or more of the following:

Explanation

Question 6 of 6

When scientists estimate life first appeared?

Select one or more of the following:

Explanation