QUESTION 1 What is the best estimate for the birth date of the Earth? 4.40 Ga 4.

Question

QUESTION 1

What is the best estimate for the birth date of the Earth?

4.40 Ga

4.40 Ma

4.54 Ga

4.54 Ma

4.0 Ga

QUESTION 2

The formation of the Moon, due to a collision between Earth and a protoplanet, occurred during which eon?

Hadean

Archean

Proterozoic

Phanerozoic

Cenozoic

QUESTION 3

Why does no rock record exist from the Hadean Eon?

Rocks couldn t form at that time.

Rocks were pulverized or melted due to meteorite bombardment.

Earth was covered by ice from pole to pole.

The atmosphere was too acidic.

No land existed on which sediments could accumulate.

QUESTION 4

Which of the following did NOT occur in the Archean Eon?

evolution of first life

development of Earth s oceans

first photosynthetic organisms

first continental crust formed

the formation of the supercontinent Pangea

QUESTION 5

The Proterozoic-aged Ediacaran fauna are significant because they:

record the earliest evidence of photosynthesis.

preserve evidence of early multicellular life.

contain the first fossils of prokaryotes.

are evidence of the first-ever life on Earth.

represent the first land animals.

4.40 Ga

4.40 Ma

4.54 Ga

4.54 Ma

4.0 Ga

Explanation / Answer

Question 1) answer) option C ) 4.54 Ga

Reason : the age of the earth is estimated to be 4.54 billion years which is equivalent to 4.54 Ga

Question 2) option a ) hadean eon

Reason : The formation of the Moon, due to a collision between Earth and a protoplanet, occurred during hadean Eon

Question 3) option b)

Reason : Rocks were unable to form in the hadean era because they were pulverized or melted due to meteorite bombardmen

Question 4) option E)

Reason : All the events mentioned in the options occurred expect the formation of the supercontinent Pangea

Question 5) option B)

Reason : Proterozoic-aged Ediacaran fauna are significant because were the first metazoans which are animals made up of multi cells which required atmospheric oxygen for their growth

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