How are the geologic time scale divisions made?

Answers

Answer 1

Answer:

A geologic time scale is composed of standard stratigraphic divisions based on rock sequences and calibrated in years. Over the years, the development of new dating methods and refinement of previous ones have stimulated revisions to geologic time scales.


Related Questions

the major source of free oxygen in the atmosphere is from ________.

Answers

Answer:

Air

Explanation:

we breathe in air so as

to live

________ are smaller earthquakes of lesser magnitude, but nonetheless sometimes dangerous, that follow a major earthquake.

Answers

Answer:

tremers

Explanation:

they are smaller then earth quakes

where is the thinnest layer of earth’s crust located?

Answers

its the oceanic crust - the oceans

What Health challenges do Afghans face?

Answers

Answer:

Major diseases

Tuberculosis. Tuberculosis is endemic in Afghanistan, with over 76,000 cases reported per year. ...

HIV. The prevalence of HIV in Afghanistan is 0.04%. ...

Poliomyelitis. ...

Pneumonia. ...

Malnutrition. ...

Leprosy. ...

Typhoid fever. ...

Hepatitis A.

Explanation:

How did the mammals take over the dominant animal position
on Earth

Answers

they murder them to take terrotory

I PROMISE I'LL GIVE BRAINLIEST... if y'all help me. I'll literally do anything, I'll give all my points. Just please. Someone do this for me.
All I need is for someone to answer this question with a paragraph.

Answers

Answer:

I think that it should be an era because I think that we have been naming a lot of eras, and I think that the time we are living in right now should be an era so it can be classified in the future. I'm not sure what it means by really know what's happening in the middle of it, but for is it possible to name an era, I think the answer is yes.

Explanation:

What major group of animals dominated the mesozoic era?

Answers

Answer:

The vertebrates were dominated by the reptiles, especially the dinosaurs.

Marine invertebrate life was dominated by the Mollusca.

Explanation:

The Mesozoic Era is best remembered for Reptiles, particularly dinosaurs.

What is the Mesozoic Era best remembered for?

The ancestors of today's major plant and animal groups first appeared during the Mesozoic, but this period is best remembered as the time of the dinosaurs.

Reptiles, particularly dinosaurs, dominated the vertebrates. The Mollusca-dominated marine invertebrate life ruled the Mesozoic Era.

Therefore, the above statement explains the  Mesozoic Era.

Learn more about Mesozoic Era here:

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In which country
are many Buddhist temples found?

No links

Answers

I would think China
China is the country with the largest population of Buddhist, approximately 244 million or 18.2% of its population

In 2012, Japan had a population of 127,368,088 with 67% of its people living in cities.

Which factor BEST explains this population distribution?

Answers

Answer:

Urban areas provide more economic opportunities than rural areas

Explanation:

Question 8 of 15 Which country holds free and fair elections to select its leaders?

A. Australia

B. Russia

C. China

D. North Korea

please answer (no links)​

Answers

Obviously the answer is Australia

It s easy A. . . .. .

PLS HELP IT IS DUE SOON AND BRAINLIEST IF YOU GET IT CORRECT!​

Answers

Abrasion is the grinding away of rock particles carried by wind, water and gravity

Answer:

its abrasion!

Explanation:

It is the process of friction caused by scuffing, scratching, wearing down, marring, and rubbing away of materials

the islands of new britain and new ireland are part of what country

Answers

Answer:

It is the largest island of New Ireland Province, lying northeast of the island of New Britain. Both islands are part of the Bismarck Archipelago, named after Otto von Bismarck, and they are separated by Saint George's Channel.

Explanation:

A disorganized array of clouds and thunderstorms with little or no rotation is known as a:___________

Answers

A disorganized array of clouds and thunderstorms with little or no rotation is known as a 'tropical disturbance'.

=》The wind speeds are below 38 miles per hour, which is why it looks disorganized & has little to no rotation.

________

RainbowSalt2222 ☔

List the producers in the food web

Answers

the tree

shrub

and the small plant

(producers are plants)

What maps group contacts (personal and professional) identifying who knows each other and who works together?

Answers

Answer:

fire department

Explanation:

how was the grand canyon formed by weathering and erosion

Answers

Answer:

The Canyon itself was carved by the Colorado River and the wind that caused the surface of the sedimentary rocks to become exposed and erode over time. The erosion of the Grand Canyon by winds, rains and the amazing strength of the Colorado River created the marvelous views and exposed magnificent caves.

The Colorado river changed and formed the structure of the Grand Canyon. Also when the Colorado River began to cut a channel through layers of rock.

what is frost shattering​

Answers

What Is Frost Shattering?

the mechanical disintegration of rock by the pressure of water freezing in pores and along grain boundaries.

Explanations:

frost weathering was volumetric expansion of freezing water. When water freezes to ice, its volume increases by nine percent. Under specific circumstances, this expansion is able to displace or fracture rock. At a temperature of -22 °C, ice growth is known to be able to generate pressures of up to 207MPa, more than enough to fracture any rock.

Hope It's Help

Answer:

Frost weathering is a collective term for several mechanical weathering processes induced by stresses created by the freezing of water into ice. The term serves as an umbrella term for a variety of processes such as frost shattering, frost wedging and cryofracturing.

What is meant by frost shattering?

The mechanical disintegration of rock by the pressure of water freezing in pores and along grain boundaries.

Explanation:

Natural erosion can be caused by _______. A. Farming b. Wind c. Deforestation d. All of the above Please select the best answer from the choices provided A B C D.

Answers

Answer:

Wind, Movement and Water.

Except, I think theres and answer choice "Wind" only.

The wind is capable of causing natural erosion. As a result, Option (B) is the appropriate response.

What is erosion?

Earthen elements are worn away during erosion, a geological process in which they are moved by wind or water. Weathering, a related process that does not involve movement, dissolves or breaks down a rock.

Most erosion is caused by ice, wind, or flowing water (usually in the form of a glacier). Erosion occurs when the water or glacier ice is murky, the wind is dusty, or both. The brown tint shows that soil and rock fragments are being transferred from one location to another while suspended in the fluid (air or water).

The majority of the world's degraded land is caused by water and wind erosion, which makes excessive erosion one of the most serious environmental issues.

Hence, the accurate answer is option (B).

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What are the three organs of a plant? leaf, stem, roots water, stem, roots leaf, air, roots leaf, stem, soil

Answers

leaf, stem,and root is the correct answers

what types of rocks initially form from deposition?

Answers

It's late...

But

Sedimentary rocks.

identifies factors that influence climate .

Answers

Factors that Influence Climate
Elevation or Altitude effect climate. Normally, climatic conditions become colder as altitude increases. ...
Prevailing global wind patterns. ...
Topography. ...
Effects of Geography. ...
Surface of the Earth. ...
Climate change over time.




Brain list please

which layer of the earth is under the highest pressure?

Answers

Answer:

Inner Core.

Explanation:

The inner core is the deepest layer on Earth. It is also made up of iron and nickel but the pressure is so high that it is no longer liquid.

Help pls is do today. ​

Answers

Answer:

B and C

Explanation:

Answer:

A and B

Explanation:

I took the quiz

A chain of events is

a timeline of scientific discovery.
a sequence of causes and effects.
a conclusion based on information.
a circumstance in which a word is use

Answers

Answer:

B. a sequence of causes and effects

Explanation:

Answer:

b

Explanation:

did it on edge

DESCRIBE A PATHWAY THAT A RAIN DROPLETWOULD FOLLOW

Answers

Condense and rain, then evaporate into a gas and rise into the clouds again.

Which of these protects the Earth from harmful radiation when found in the stratosphere, but is a pollutant at lower altitudes?

A.
carbon

B.
oxygen

C.
ozone

D.
hydrogen

Answers

Answer:

the ozone protects earth

During the summer, the __________ Hemisphere is tilted toward the Sun, and the weather conditions are relatively calm.

Answers

I’m pretty sure the answer is Northern

Which location represents December 21st?
D
Earth's orbit
A
Equator
Sun
C
B
А
ОВ
Ос
.

Answers

Answer:

equator sun

Explanation:

the winter solstice explained. at 6:12.a.m. EST on Friday (Dec 21) , the sun will reach a point where it will appear to shine farthest

to the South of the equator, over the tropic of Capricorn , Thus markingthe moment of winter solstice -the beginning of the winter.

Which country in Europe has some of the best farmland, with three-fifths of its land under cultivation

Answers

France has a usable agricultural area of nearly 74 million acres (30 million hectares), more than three-fifths of which is used for arable farming (requiring plowing or tillage), followed by permanent grassland (about one-third) and permanent crops such as vines and orchards (about one-twentieth).

France is the country in Europe has some of the best farmland, with three-fifths of its land under cultivation.

The total land of France which is cultivable is 74 million acres which is three fifth of its total land.

Most of this agricultural land is used for arable farming and then followed by grassland and  vines and orchards.  This makes France the leading agricultural nation. The country is also known as "Bread basket of Europe".

About one-eighth of the total value of the country’s exports is related to agricultural-associated products.

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what are marine biomes and what threats do they face?

Answers

Answer:

BELOW

Explanation:

The marine biome is the biggest biome in the world! It covers about 70% of the earth. It includes five main oceans: the Pacific, Atlantic, Indian, Arctic, and Southern, as well as many smaller Gulfs and Bays. Global warming is causing sea levels to rise, threatening coastal population centers. Many pesticides and nutrients used in agriculture end up in the coastal waters, resulting in oxygen depletion that kills marine plants and shellfish. Factories and industrial plants discharge sewage and other runoff into the oceans.

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