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Law Incorporation [45]
3 years ago
10

Hmmmmmmmmmmmmmmmmmm?

Geography
1 answer:
yawa3891 [41]3 years ago
4 0

Answer:

Medullosa would be the least useful index fossil.

Explanation:

When it comes to the past of Earth, what has happened, what was present, why or why not something was there, dating, geology uses numerous different methods. One of those methods, which is relatively accurate and is a good indicator of the layer and other things around it, are the index fossils.

The index fossils are fossils that can be found in numerous different places around the world. They also appear only in a specific and not very long timeline. From the fossils we have presented, while we don't have information about their dispersal, we do have timelines of when the organisms existed. Medullosa is the obvious candidate that would be the least useful if it was to be used as an index fossil. This is due to the enormous timeline of the existence of this organism, stretching somewhere around 90 million years and through two periods, the Carboniferous and Permian, which will make it very hard to find any use of it in determining anything significant.

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The technique called radiometric dating is based on
Dima020 [189]

Answer:

D) the steady, clocklike decay of certain radioactive isotopes over time.

Explanation:

Geologists use radiometric dating to estimate how long ago rocks formed, and to infer the ages of fossils contained within those rocks.

For example, when rocks are formed, such as igneous rocks (formed when molten rocks cools), certain radioactive atoms are trapped inside the rocks during this formation process. Then these radioactive atoms decay over time.

The age of the rock can be estimated by comparing the occurring radioactive isotope within the material to the abundance of its decay products, which form at a known constant rate of decay.

From the options;

A) this is about the formation of the radioactive molecules and not about radiometric dating

B) this is radiocarbon dating (cabon dating/carbon-14 dating)

C) the <em>assumption </em>is wrong since the radioactive isotopes decays not accumulate.

D) the corect option as I explained earlier.

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3 years ago
Listed following are events or phenomena that occur during either the part of the sunspot cycle known as solar minimum or the pa
Eddi Din [679]

Answer:

  • 1. Sunspots are most numerous on the Sun.
  • 2. Solar flares are most common.
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Explanation:

  • The solar max is a period when the activities of the sun gets started for a period of 11 years which is cyclic in nature and occurrence of the solar flares and suns radiance increase also there an increase in the sunspots and it affects the weather patterns on earth and also can lead to magnetic fields interaction on earth.
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Answer:Nonrenewable energy resources, like coal, nuclear, oil, and natural gas, are available in limited supplies. This is usually due to the long time it takes for them to be replenished.

Renewable resources are replenished naturally and over relatively short periods of time.

Explanation:

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What are the choices?
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The answer is, I believe, the Grand Canyon.
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