Oceanography: An Invitation To Mar...

9th Edition
Garrison + 1 other
Publisher: Brooks Cole
ISBN: 9781305254282

Oceanography: An Invitation To Mar...

9th Edition
Garrison + 1 other
Publisher: Brooks Cole
ISBN: 9781305254282


Chapter 1, Problem 9TC
Textbook Problem

How old is Earth? When did life arise? On what is that estimate based? How did the moon form?

Expert Solution
To determine

The age of the Earth, the time during which life originated, the base for these estimates, and the formation of Moon.

Explanation of Solution

Age of the Earth and the time of origin of life

The earliest surface of Earth is assumed to have developed before nearly 4.6 billion years. Hence, its age is also taken as 4.6 billion years. There is no reliable evidence to prove that the age of Earth is between 6,000 and 10,000 years.

The scientists relied on many elements to arrive at a conclusion regarding the Earth’s age. The meteorites, rock chunks as well as metals formed during the same time of formation of the Sun and planets, out of the same cloud serve as one of the sources to estimate Earth’s age. A number of these objects have fallen to Earth recently. The signs of radiation inside these objects helps to determine their age. This information, together with the rate of radioactive decay of unstable atoms in meteorites, moon rocks, and in the most ancient rocks on Earth, lets the astronomers make sensibly precise approximations of the age of these objects.

The remnants of fairly intricate organisms resembling bacteria have been found from northwestern Australia, which dated between 3.4 billion and 3.5 billion years. This was the oldest fossils reported until now...

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Chapter 1 Solutions

Oceanography: An Invitation To Marine Science, Loose-leaf Versin
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Ch. 1.3 - What element makes up most of the detectable mass...Ch. 1.3 - Outline the main points in the condensation theory...Ch. 1.3 - Trace the life of a typical star.Ch. 1.3 - How are the heaviest elements (uranium or gold)...Ch. 1.4 - What do you think Earth would be like without its...Ch. 1.4 - Do you think the volume of the ocean is...Ch. 1.4 - What is density stratification?Ch. 1.4 - How old is Earth? How do we know?Ch. 1.4 - How was the moon formed?Ch. 1.4 - Is the world ocean a comparatively new feature of...Ch. 1.4 - Is Earths present atmosphere similar to or...Ch. 1.5 - Are the atoms and basic molecules that compose...Ch. 1.5 - How old is the oldest evidence for life on Earth?...Ch. 1.5 - Was Earths atmosphere rich in oxygen when life...Ch. 1.6 - Think of the long history of the atoms in your...Ch. 1.6 - Have the particles that make up the atoms of your...Ch. 1.7 - Where would you look for water in our solar...Ch. 1.7 - If we encounter life elsewhere, would we expect...Ch. 1 - Why do we refer to only one world ocean? What...Ch. 1 - Which is greaterthe average depth of the ocean or...Ch. 1 - Can the scientific method be applied to...Ch. 1 - What are the major specialties within marine...Ch. 1 - Where did the Earths heavy elements come from?Ch. 1 - Where did Earths surface water come from?Ch. 1 - Considering what must happen to form them, do you...Ch. 1 - Earth has had three distinct atmospheres. Where...Ch. 1 - How old is Earth? When did life arise? On what is...Ch. 1 - What is biosynthesis? Where and when do...Ch. 1 - Marine biologists sometimes say that all...Ch. 1 - How do we know what happened so long ago?Ch. 1 - What is density stratification? What does it have...Ch. 1 - Do we know of the existence of other water...

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