Why are some units of the geologic time scale longer and some shorter?

Answers

Answer 1

The geologic time scale is divided into several different units. There are eon, era, period, epoch. They all have different lengths, and some are very long, while some are much shorter. The eon is the longest of them all spending for over half a billion years, or even more than a billion. The era stretches for few hundreds of millions of years. The period lasts for tens of millions of years, while the epoch is stretching for several millions of years. The reason why they are with different lengths is that they are marked by certain important events in the past. Some are marked by significant changes in the climate, some by extinction of species, some by big disasters, some by changes on the surface of the Earth, some by the changes of the atmosphere.


Related Questions

(27 Points) Which of the following occurs in the sun's radiation zone?


A. Energy created through nuclear fusion.

B. Hot gases rise to the surface of the sun, cool off, and sink.

C. Energy is transferred through electromagnetic radiation.

D. None of the above.


Brainliest will be given on a first come first serve basis, when the option is available. (The answer must be correct.)

Answers

Answer:

Hmm i know it's either A or C. I'm going to say A.

Explanation:

Hope i helped you! :)

Answer:

Im pretty sure its A I got this in one of my quizes

Explanation:

What is currently happening to global sea level

Answers

The global sea level is currently rising.

From 1900 and 2016, the sea level rose by 16–21 cm (6.3–8.3 in).

The factors that has contributed to the rising sea level are: Thermal expansion and the melting of glacier.

As the global temperature rise given to the rising in greenhouse gases produced by human activities, more heat is trapped in the atmosphere, the temperature increase.

As the temperature rise, the sea water would expand, hence causing the rise of sea level.

In addition, the glacier in North Pole, South Pole and Antarctica has melted due to the heat, increasing the amount of sea water, contributing to the rising sea level.

Hope it helps!

How long does it take Mercury to complete one revolution around the sun?

Answers

Answer:

About 88 earth days.

Explanation:

It is much closer to the sun than the earth, and therefore has less distance to travel to orbit the sun.

Mercury is the smallest planet of the eight planets and is made up of rock and metal. One year on Mercury is only 88 Earth days. That's how long it takes for Mercury to orbit the sun. Mercury rotates very slowly, so its days are very long. A day on Mercury is 59 Earth days.

What is the most abundant element in the universe?

Answers

Answer:

hydrogen

Explanation:

Answer: Hydrogen

Explanation: Hydrogen is used as the fuel of stars, and since there are over 500 billion galaxies in the universe (that contain billions of stars), hydrogen is very common. Also, stars are always being born in star birth nebulae, making hydrogen even more plentiful!

How does the topography of the seafloor give evidence for seafloor spreading?

Answers

The topography of the seafloor gives us a nice clue about the seafloor spreading. This can be seen in the highest of the underwater features. The mid-ocean ridge is the highest. It is the place where the magma comes out, cools off, and constantly creates new rocks, or rather crust. As we move further away from the mid-ocean ridge, we will notice that the sea mounds are getting smaller and smaller, but also more rounded, or flatter. This is an evidence of the erosion by the water. As the water erodes the crust, it loses on height, thus becomes less pointy, and more rounded or flatter. As we move even further away we will see that there's no more sea mounds, but it is only the old crust that is predominantly flat, which of course has been caused by the millions of years of erosion by the water. This was actually the first thing that has been noticed and that gave a clue to the scientists that maybe the seafloor is spreading, and with the further examinations of it, it turned out to be true.

The topography of the seafloor gives evidence for seafloor spreading through the presence of mid-ocean ridges, the age distribution of oceanic crust, and magnetic stripes.

The topography of the seafloor provides compelling evidence for seafloor spreading. One key observation is the existence of mid-ocean ridges, which are underwater mountain ranges where new oceanic crust is formed. At these ridges, hot mantle material rises and erupts as lava, which cools to form new seafloor that gradually moves away from the ridge.

There are several lines of evidence supporting this phenomenon:

Age of the Crust: The age of the oceanic crust increases as you move away from the mid-ocean ridges. This is consistent with new crust being formed at the ridges and pushing older crust outward.Magnetic Stripes: Magnetic surveys of the ocean floor have revealed parallel magnetic stripes on either side of mid-ocean ridges. These stripes record Earth's magnetic field reversals, providing a timeline that matches the age and movement of the seafloor.Ocean Trenches: Deep ocean trenches are sites where the oceanic crust is forced back into the mantle, providing a balance to the new crust being formed at the ridges.

During World War II, advancements in technology allowed scientists to map the ocean floor and gather data that explained how continents drift. This led to the seafloor spreading hypothesis in the 1960s, which integrates these observations and demonstrates the mechanism behind continental drift.

Landlocked sea that borders russia and iran

Answers

Answer:

Caspian Sea

Explanation:

The largest lake in the world, or often referred to as a landlocked sea, the Caspian Sea, is the body of water on which both Russia and Iran come out and have borders on it. Iran occupies the southern part of the Caspian Sea, while Russia occupies the northern half of its western part and the northwestern part. The other three countries that have their share in this lake are Kazakhstan, Turkmenistan, and Azerbaijan.

The Caspian Sea is actually a lake, as in order to be classified as a sea it has to be connected with the rest of the ocean and sea waters, and it is not, it is landlocked. It has saline water though, which is why it is referred to as a sea. The saline water in it is there because this lake is a remnant of a once very large ocean, Tethys, that was stretching all the way from Spain to Indonesia, and from the central part of the Indian Ocean to Central Asia. With the movement of the Indian plate toward southern Eurasia, and the African toward western Eurasia, this ocean was closed down. The collision of these plates with he Eurasian caused the formation of numerous mountain chains as well, so Tethys was totally destroyed, only leaving behind it remnants like the Caspian Sea deep inland.

It has been statistically shown that males live longer than females in almost all cultural groups throughout the world. True False

Answers

False. Hope it helps!!

The answer is false.

How many u.S. States share a border with mexico?

Answers

4 states share a border with Mexico!!

Arrange the seven countries of central america in alphabetical order

Answers

First of all, let's list the countries going from North to South.

Belize

Guatemala

El Salvador

Honduras

Nicaragua

Costa Rica

Panama

Now, we organize in alphabetical order.

Belize

Costa Rica

El Salvador

Guatemala

Honduras

Nicaragua

Panama

I hope this helps! Have a great day!

how did monsoon in South Asia has historically influenced globalization

Answers

Answer:

The monsoon of South Asia is among several geographically distributed global monsoons. It affects the Indian subcontinent, where it is one of the oldest and most anticipated weather phenomena and an economically important pattern every year from June through September, but it is only partly understood and notoriously difficult to predict. Several theories have been proposed to explain the origin, process, strength, variability, distribution, and general vagaries of the monsoon, but understanding and predictability are still evolving.

The unique geographical features of the Indian subcontinent, along with associated atmospheric, oceanic, and geophysical factors, influence the behavior of the monsoon. Because of its effect on agriculture, on flora and fauna, and on the climates of nations such as Bangladesh, Bhutan, India, Nepal, Pakistan, and Sri Lanka — among other economic, social, and environmental effects — the monsoon is one of the most anticipated, tracked,[3] and studied weather phenomena in the region. It has a significant effect on the overall well-being of residents and has even been dubbed the "real finance minister of India

Explanation:

What african landform has rolling grassland and few scattered trees

Answers

Answer:

SAVAnNA

Explanation:

Which of these are the two major sources of nitrate pollution in rivers? the burning of fossil fuels by factories and cars animal wastes and the burning of fossil fuels by cars animal wastes and fertilizers fertilizer runoff and the burning of fossil fuels by cars animal wastes and the burning of fossil fuels by factories

Answers

Answer:

animal wastes and fertilizers

Explanation:

The majority of the nitrates that are polluting the rivers come from the animal wastes and from the fertilizers used in the agriculture. The increased amounts of nitrates in the rivers causes eutrophication. This basically means that the water is becoming over-saturated with nutrients. This leads to the spreading out of the algae. As the algae spread out more and more, they cover the surface part of the water, so large portions of the rivers do not receive sunlight, which kills of the organisms that use photosynthesis. Further, the algae reduce the amount of oxygen in the water, often resulting in dying out of the fishes. It is a chain reaction that leads from one thing to another and the end result is devastating.

The Chinese government main reason for setting up four special economic zones in areas close to Hong Kong and taiwan was

Answers

The Chinese government's main reason for setting up four special economic zones (SEZs) in areas close to Hong Kong and Taiwan was to stimulate foreign investment and promote economic reform. The option (A) is correct.

Establishing these zones led to a significant increase in foreign direct investment (FDI) and helped modernize China's economy by increasing manufacturing capacity and urbanization.

The SEZs, such as Shenzhen located across the border from Hong Kong, became important centers for industrial development, promoting a major rural-to-urban shift as people moved from the countryside to the cities seeking work in factories.

This question is not complete, Here I am attaching the complete question:

The Chinese government's main reason for setting up four special economic zones in areas close to Hong Kong and Taiwan was:

a) To stimulate foreign investment and promote economic reform.

b) To establish strategic military bases in key geographical locations.

c) To enforce stricter trade regulations and limit foreign influence.

d) To concentrate resources for rapid industrialization and urbanization.

The builder of a house on a cliff overlooking the ocean should be concerned about what
geologic phenomenon?​

Answers

Final answer:

Builders need to be wary of sea cliffs due to wave erosion and mass wasting, requiring detailed knowledge of geological features and coastal erosion.

Explanation:

Sea cliffs are a significant concern for builders constructing homes on cliffs overlooking the ocean due to the erosional forces of waves and mass wasting. When waves cut away at the base of sea cliffs, higher rocks can collapse into the sea, leading to potential hazards for structures built on the cliffs. Understanding geological features and the effects of coastal erosion is crucial when considering construction near coastal cliffs.

What country is bordered on the north by poland and germany

Answers

This would be the Czech Republic or Czechia

The country bordered on the north by Poland and Germany is the Czech Republic, known as Czechia. Poland's historical borders have fluctuated greatly, but the modern boundary was established after World War II. Germany's borders have also changed over time, affecting neighboring countries like Czechia.

The country that is bordered on the north by Poland and Germany is the Czech Republic, also known as Czechia. Throughout history, the borders of Poland have changed significantly. Initially, the Poland-Lithuania government extended from the Baltic Sea to near the Crimean Peninsula in the Black Sea during the mid-1500s. However, due to invasions and territorial changes, Poland vanished from the map between 1795 and 1918. Post World War II, modern Polish boundaries were set, establishing its border with Germany, Czechia, Slovakia, Ukraine, Belarus, Lithuania, and a part of Russia known as the Kaliningrad Oblast.

Germany, prior to unification in 1871 and subsequent territorial losses, held lands that are now part of Poland. After the Sudetenland incident and the shift in German borders, Czechoslovakia bordered both Germany and Poland, which can be seen as per historical maps. As borders evolved over time, Poland now shares its western border with Germany and its southern border with Czechia.

The weakening of rock due to expansion and contraction resulting from temperature changes is known as A. exfoliation. B. thermal stress. C. leaching. D. haloclasty.

Answers

Answer: B

Thermal Stress will weaken rock formations due to expansion and contraction from temperature changes.

Answer:

B. thermal stress

Explanation:

Rocks are weakening due to alternate expansion and contraction of the rocks. Rocks are expanded when it undergoes the high temperature, then it becomes expanded due to distance between the particles which are distant to each other. If winter season comes, rocks undergoes the low temperature then it becomes contracted due to distance between the particles are close to each other. Exfoliation is the one type of mechanical weathering and Halocasty is the one of the physical weathering process.

If you love surfing, you can travel to this country and try surfing on water during the season called La Canícula. The country that has La Canícula is ________.

Answers

it is celebrated in usa ....it is also called as dog day but southern state like texas call it as la canicula

What economic activity is located in the taiga of russia

Answers

Final answer:

The taiga of Russia is home to significant economic activities such as mining, timber harvesting, and oil exploration. These exploit the rich natural resources found in the region but also contribute to considerable environmental issues such as habitat loss and pollution.

Explanation:

The taiga of Russia, also known as the boreal forest or coniferous forest, plays a considerable role in the country's economy. The primary economic activities in the taiga include mining, timber harvesting, and oil exploration. These activities exploit the region's abundant natural resources such as oil, natural gas, timber, diamonds, gold, and other precious metals. The Kuzbas region, in particular, is renowned for coal, iron ore, and bauxite mining; timber processing; and steel and aluminum production. Agriculture also contributes to the economy in areas like the eastern Lake Baikal region, albeit on a smaller scale compared to mining and logging.

Environmental concerns are substantial, as the taiga is a fragile biome that is affected by pollution and habitat loss due to these economic activities. Air and water pollution from smelting processes and massive oil spills are some examples of environmental damage that has resulted from the exploitation of the taiga's resources. This biome, dominated by Type D climates, is one of the largest terrestrial biomes, covering expansive areas of Northern Hemisphere countries.

Could california fall into the pacific ocean during a bad earthquake

Answers

Answer: Yes

Explanation:

Answer:

No

Explanation:

California is firmly planted on the earth's crust in a location where it spans two tectonic plates. The San Andreas Fault System, which crosses California from the Salton Sea in the south to Cape Mendocino in the north, is the boundary between the Pacific Plate (that includes the Pacific Ocean) and North American Plate (that includes North America). These two plates are moving horizontally, slowly sliding past one another. The Pacific Plate is moving northwest with respect to the North American Plate at approximately 46 millimeters per year

Which of the following scenarios best describes the activity present along the Mid-Atlantic Ridge? Magma is created by partial melting of crustal material as it sinks. Magma wells up at the center of the ridge, which pushes the old seafloor apart as new seafloor is created. A plume of hot mantle material is pushing up against the crust, adding material to the crust to thicken it. Segments of seafloor slide past each other without creating or destroying crustal material. Old seafloor is consumed as it is forced beneath another segment of seafloor.

Answers

Answer:

Magma wells up at the center of the ridge, which pushes the old seafloor apart as new seafloor is created

Explanation:

The Mid-Atlantic Ridge is formed at the divergent boundaries of the North American and Eurasian plates, and the South American and African plates. This basically means that these plates are moving away from one another, living thinner, fragile crust behind them. The magma from the mantle manages to penetrate through it relatively easy, and as it reaches the ocean floor it quickly cools off and creates new crust. The magma continuously rises, and it piles up more and more new crust, while in meantime pushing the old crust sideways and moving it further away from center of the ridge from the the ocean spreading occurs.

Name the landlocked sea that borders russia and iran

Answers

Answer:

Caspian Sea

Explanation:

The Caspian See borders the Caspian. the Caspian includes Azerbaijan, Russia, Kazakhstan, Turkmenistan, and Iran.

Mordancy.

The landlocked sea that borders russia and iran is the  Caspian Sea

How is that so?

The Caspian Sea is a body of water that is surrounded by land and it is located next to Russia and Iran. It is the biggest lake in the world and is situated between Eastern Europe and Western Asia.

The Caspian Sea is surrounded by different countries. It is next to Russia in the north, Iran in the south, Kazakhstan in the northeast, Turkmenistan in the southeast, and Azerbaijan to the west.

It is called a "sea" because it is so big and has saltwater, but it is actually a lake surrounded by land. It is located in the middle of Europe and Asia and shares borders with five countries, including Russia and Iran.

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What country is shaped like an elephants head

Answers

Answer:

Thailand

Explanation:

Explain the difference between a seasonal worker and a migrant worker.
Written Explaination.

Answers

Answer:Migrant workers are people who work in countries of which they are not citizens. Seasonal workers move from one seasonal job to another. Seasonal workers often are engaged in manual labor in the agricultural sector.

Explanation: plz mark brainliest

People who work as migrants do so in nations of which they are not citizens. Seasonal workers switch between seasonal jobs. Manual labor is a common task for seasonal laborers in the agricultural industry.

What are workers?

Employees are people who have been employed by their employer, often known as the person or company they work for, to execute tasks for them. According to the IRS, people are regarded as employees if the employer has control over the work done.

An activity within an economic sector is referred to as a seasonal industry if the majority of operations only occur during a specific time of the year, typically within a period of six months or fewer.

According to the International Labor Organization's instruments, a "migrant worker" is a person who migrates or has relocated from one country to another with the intention of working for someone else other than himself.

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The solar system has _____ planets, and Earth is the __________ planet from the Sun. A. 8 . . . third B. 7 . . . fourth C. 6 . . . fifth D. 5 . . . sixth Please select the best answer from the choices provided A B C D

Answers

Answer:

A. 8 and third

Explanation:

The solar system has 8 planets, and Earth is the third planet from the Sun.

Answer: Option A

Explanation:

The solar system previously had nine planets with Pluto being the smallest. However, with latest standards, Pluto is no longer considered a planet and so the solar system has eight planets namely Mercury, Venus, Earth, Mars, Jupiter, Saturn, Neptune and Uranus. Mercury is the closest to the sun.The earth is third from the sun and is the only planet that supports life because of the presence of water on it.

Two negative environmentally/ecological effects of the green revolution ?

ap human geo

Answers

They use chemical fertilizers and synthetic herbicides to keep the animals away

Final answer:

Two negative environmental effects of the Green Revolution are increasing social inequality and environmental degradation.

Explanation:

Two negative environmental effects of the Green Revolution are:

Increasing social inequality: The introduction of high-yielding crop varieties has often resulted in richer landlords becoming wealthier while landless peasants become poorer. This widening social inequality can lead to social unrest and economic disparities.Environmental degradation: The use of agrochemicals and machinery in industrial farming, which is a part of the Green Revolution, has led to soil pollution, soil erosion, and desertification. These environmental problems can have long-term negative effects on ecosystems and agriculture.

What body of water is found south of the great victoria desert in australia?

Answers

Answer:

Great Australian Bight

Explanation:

The Great Victoria Desert is located in the central southern part of Australia. It is a vast desert with roughly west-east stretching, parallel and relatively close to the southern coast of Australia. The body of water just south of this desert is the Great Australian Bight. The Great Australian Bight is enormous oceanic bight, occupying the the western and central parts of the southern coastline of Australia. It is a water body that seemingly goes inland as it is curved inside toward the Australian mainland. While the northern border of this body of water is the Australian coastline, its southern border is the Southern Ocean. There is a little confusion about the Great Australian Bight and to which ocean it belongs too, with the Australian scientists claiming it is part of the Southern Ocean, while all the rest from around the world claim that it is part of the Indian Ocean.

What is Lakeview oregon's average yearly rainfall in inches

Answers

Answer: 14

Explanation:

I read it. Have a nice day.

Which central american country has the most populated city

Answers

Answer:

Guatemala City

Explanation:

Central America is not home to cities that are enormous and fall into the category of the biggest cities in the world, nonetheless it has several cities with over million inhabitants. The largest city by population in this region is the capital of Guatemala, Guatemala City, having 2,918,000 as of the 2015. Guatemala City is actually almost twice more populated than the second most populated city in the region Panama City. This city is located in the south central part of Guatemala. As most of the large cities on these latitudes it is a city located on higher elevation, settled in a high valley surrounded by mountains. It is a vibrant city, being the center of pretty much everything i Guatemala, though it can also be said that it has lot of improvements to be done, as the infrastructure is not the best, there's lot of corruption, and the organization of the city is also on a relatively low level.

The most populated city in Central America is Guatemala City, which is the capital of Guatemala.

Guatemala City is the largest urban center in the region, with a significant portion of the country's population residing in and around the city. Guatemala City is not only the capital but also the economic, cultural, and political center of Guatemala. It is known for its rich history, architecture, and vibrant cultural scene.

The city's population is diverse, with a mix of indigenous communities, mestizos, and people of European and other ancestries. With its mix of modern skyscrapers and historic architecture, it offers a blend of the old and the new.

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[FW.01]Dams are used to produce hydroelectric power. Which of these best describes the impact of a dam on the environment?

Answers

Answer:

Dams affect the migration pattern of many different fish, creating a couple of issues.

Answer:

Out of the given statements, the statement that best describes the impact of a dam on the environment is that it causes changes in the river ecosystem.

Explanation:

Dams are usually built on rivers that flow through valleys formed by two elevated landforms on two sides. Thus, when a dam is built, it interferes with the natural setting and stops the natural flow of the water. This makes the water levels behind the dam grow considerably. Many a times, the landforms in the surrounding regions get submerged in the water due to the increased levels of water. The natural movement of aquatic animals like fishes and crabs is also hindered by the dam.

Which provide the most creative explanation for why sediment form horizontal and parallel layer

Answers

Answer:

The principle of original horizontality and lateral continuity

Explanation:

The principle of original horizontality explains how sedimentary rocks are laid and arranged strategically in basins of deposition flatly and horizontally in space. It is very important when trying to determine the original orientation of strata in a sedimentary terrain. Sediments are laid in water under a strong influence of gravitational force.

The principle of lateral continuity shows that sediments are laid out laterally and parallel to one another until they thin or taper out on their edges. This shows the layered or stratified nature of sediments.

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