Convergent boundaries occur when two tectonic plates move towards each other. Subduction zones are a type of convergent boundary where one plate is forced beneath another plate into the mantle.
This usually happens when an oceanic plate collides with a continental plate, as the denser oceanic plate is forced down into the mantle. Continental collision is also a type of convergent boundary, but instead of one plate subducting beneath the other, both plates collide and buckle, causing the formation of mountains. If an oceanic plate is colliding with a continental plate, it is likely a subduction zone. If two continental plates are colliding, it is likely a continental collision. Another way to distinguish is by looking at the geological features in the area. Subduction zones often result in volcanic activity and the formation of trenches, while continental collision results in the formation of mountain ranges.
Distinguish between convergent boundaries involving subduction zones and continental collisions, you can consider the following points:
1. Types of plates involved:
- Subduction zones: These occur when an oceanic plate converges with either another oceanic plate or a continental plate. The denser oceanic plate subducts, or slides beneath, the less dense plate.
- Continental collisions: These occur when two continental plates converge, as both plates are of similar density and neither can subduct. Instead, they collide and form mountain ranges.
2. Geological features:
- Subduction zones: These boundaries are characterized by deep oceanic trenches, volcanic island arcs (in oceanic-oceanic subduction), or volcanic mountain ranges along the edge of the continent (in oceanic-continental subduction).
- Continental collisions: These boundaries result in the formation of large mountain ranges, such as the Himalayas or the Alps, due to the compression and uplift of the Earth's crust.
3. Seismic and volcanic activity:
- Subduction zones: These areas are prone to frequent earthquakes and volcanic activity due to the friction and pressure caused by the subducting plate. The melting of the subducting plate generates magma, leading to volcanic eruptions.
- Continental collisions: These areas experience frequent earthquakes due to the immense pressure and stress from the colliding plates. However, volcanic activity is generally absent in continental collision zones, as there is no subduction of a plate to generate magma.
By considering these factors, you can distinguish between convergent boundaries involving subduction zones and those involving continental collisions.
Learn more about tectonic plates here: brainly.com/question/19317822
#SPJ11
Which sequence of numbers reflects the order in which the layers were deposited?
Your question is incomplete. Please read below to find the missing content.
The sequence is 1,2,3 and 4.
Sedimentary rocks are laid down in layers referred to as beds or strata. A mattress is defined as a layer of rock that has a uniform lithology and texture. Beds form by using the deposition of layers of sediment on top of every difference. The series of beds that characterizes sedimentary rocks is called bedding.
Stratification is the layering that occurs in most sedimentary rocks and in the ones igneous rocks formed on the Earth's surface, as from lava flows and volcanic fragmental deposits.
Sediments are classified in line with their size. so that it will define them from the smallest size to the biggest length: clay, silt, sand, pebble, cobble, and boulder.
Which sequence of numbers reflects the order in which the layers were deposited?
a) 1234
b) 4321
c) 2314
Learn more about sedimentary rocks here: https://brainly.com/question/13291293
#SPJ4
Darker colored rocks that are rich in iron and magnesium are are referred to as being ____________________ in composition.
[tex]\underline{\huge\sf \color{purple}{ ↪ \pink{Answer }} }[/tex]
Darker colored rocks that are rich in iron and magnesium are are referred to as being Ferromagnesian Minerals in composition.
[tex] \\ \\ [/tex]
____________________Should we protect native British species against invasive species? Justify your view?
Answer:
I think yes, you should protect native British species because invasive species can be harmful to the land and they can destroy the envorment that the native species live in making the native species suffer and maybe go extinct. invasive species like the Asian carp, can also affect humans as well and have a domino effect on all surroundinglife around an invaded area. so yes, you should protect them.
Specialization: multiple choice reduces the cost of production for all producers. ensures more wealth for everyone. creates more income for consumers and producers. ensures that goods and services are produced by low-cost producers
Specialization ensures that goods and services are produced by low-cost producers.
What is specialization?It should be noted that specialization simply means the concentration of the production in a particular field.
In this case, specialization ensures that goods and services are produced by low-cost producers.
Learn more about specialization on:
brainly.com/question/24448534
#SPJ1
PLEASE I NEED THIS PROJECT SO BAD PLEASE SOMEBODY HELP ME PLEASE !!!
In this project, you will compare the descriptions of a national park over the last hundred years. Choose a national park to complete the following:
1) Locate a primary source describing the geography and environment of the park. This source should have been written either before, or close to, the time that the park was founded.
A primary source is an original document or artifact that comes from the period of time being studied. Someone from that time period actually wrote, created, or used the object being studied.
Examples of primary sources are diaries, letters, oral histories, and eyewitness accounts.
When searching for a source, consider looking for something written by John Muir, Lewis and Clark, or Theodore Roosevelt. Each of these men wrote descriptions of many of the parks that are protected today.
2) Paraphrase the author’s description in the comparison chart. Be sure to record key characteristics of the geography; you will want specific details for your writing.
To paraphrase information:
Reword the passage from source material in your own words.
Aim for a shorter and slightly condensed version of the original material.
Attribute material to the original source.
3) Locate a secondary source describing the geography and environment of the park today.
Secondary sources are documents written after the event occurred. They provide a secondhand account of the event or topic. Secondary sources often contain more analysis, or even conclusions, regarding the events or topics discussed.
Examples of secondary sources are newspaper and journal articles, academic textbooks, encyclopedias, reference books, and other nonfiction books and websites.
4) Paraphrase the author’s description in the comparison chart. Record specific details and pay close attention to similarities and differences you notice between this source and your previous one.
Then, using your completed comparison chart, create a multimedia comparison of the similarities and differences between the two sources. Your comparison should have at least three sections or paragraphs and can be in the format of a wiki, a Web site, or an interactive poster on the national park.
In the first paragraph or section, discuss the similarities between the descriptions in your sources about the park. Your first paragraph should have at least one properly cited quote and be 70 words long.
In a new paragraph or section, contrast the descriptions of the park in the two sources, explaining what has changed since the park has opened. Your paragraph should have at least one properly cited quote and be 70 words long. Include a properly cited picture of the park to add to your information.
In the final section, analyze the changes that occurred in the park and what caused them. Your paragraph should be well-developed, with complete and complex sentences, and at least 70 words long. Add either a source or a relevant picture to your project that enhances the quality of your presentation. Remember to properly cite your sources.
At the end of your project, create a bibliography page that properly follows the APA Style Citation Guide for citations.
Please put the websites you used to answer this if u did use one.
A sample of how a primary source would describe a national park is:
A Diary EntryThe Montessori National Park was unlike any I have seen. Sure, I have seen bigger national parks, but this one was unique and different.
There is a wide range of different wildlife and the keepers and guides are always ready to give tours and explanations to visitors.
What is a National Park?This refers to the part of a country that has historical significance and is usually a body of water that is protected by the government and has wildlife animals.
Hence, we can see that a secondary source to describe a national park would be:
A newspaper entryThe Montessori National Park has been opened to the public and it has 16,000 square inches of space.
It contains wildlife such as lions, snakes, alligators, monkeys, and many more. It was recorded to have the highest visitors over the past 6 months in the entire state!
Read more about national parks here:
https://brainly.com/question/13532966
#SPJ1
Which items have reduced the quality of North American forests?
MULTIPLE CHOICE!!
aquaculture
pollution
conservation
overgrazing
overfishing
climate change
population growth
logging
Answer:
Logging,pollution,population growth
Explanation:
Logging - Logging, as in most parts of the world is something that destroys the forests, and even if it is regulated properly and new trees are planted when the old ones are taken down, the small trees need much longer period to fully grow and replace the trees that are taken down, while the demand is growing more and more.
Pollution - As in most things, the pollution, mainly the soil and water pollution, are directly damaging the forests and contribute to their dying out because of high intake of toxins.
Population growth - Because of the ever growing population in the United States and the ever increasing demand for new living facilities, the towns and cities are expanding, and this means clearing the forests as well so that the construction work can take place.
Discuss the importance of soil in the development of rural settlement
Soil has a significant importance in the development of rural settlement.
Given that soil provides the majority of food, feed for livestock, fiber, and biotic fuel as well as serving as a source of greenhouse gases and an integral component of biogeochemical cycles, it is a very significant natural resource. There is evidence that anthropogenic activities in rural areas are placing increasing demand on soil resources. The surface sealing of soils is one of the most obvious issues related to the growth of rural settlements. The term "loss of soil resources owing to the covering of land for housing, roads, or other building work" is referred to as "soil surface sealing," and it is a typical outcome of rural anthropogenic activity and infrastructure construction.
Learn more about Soil here https://brainly.com/question/25146263
#SPJ1
Above the tropopause is the layer which starts between 6.2 miles to 8.1 miles (10-13 km), depending on the latitude, and is made up primarily of ozone, which is called the __________
Above the tropopause is the layer which starts between 6.2 miles to 8.1 miles (10-13 km), depending on the latitude, and is made up primarily of ozone, which is called the Stratosphere.
What is Stratosphere?The word "stratosphere," which can be translated as "layer" or "level," simply signifies the space above the atmosphere of the earth. It has the ozone layer, which protects us from UV radiation from the sun except where it has been damaged by synthetic pollutants.
Stratosphere: The ozone layer, which shields us from the Sun's harmful UV radiation, is found in the stratosphere, which is located between 12 and 50 kilometres (7.5 and 31 miles) above the surface of the Earth.
Above the troposphere, it is the second layer of the atmosphere. It rises 50 kilometres above the surface of the earth. Due to its low water vapour content, this stratum is extremely dry.
Learn more about Stratosphere here:
https://brainly.com/question/4692690
#SPJ4
A landowner owned a large tract of land in an area zoned for medium residential use. Permitted uses in this zone
Answer:
landowner owned a large tract of land in an area zoned for medium residential use. Permitted uses in this zone are single-family dwellings, condominium and townhouse developments, and moderate density apartment complexes.
why birth rates and death rates decrease with increased wealth
Answer:
check reason below
Explanation:
death rates decrease due to advanced technologies(better medical institution)
birth rates decrease to high levels of literacy and due to families planning.
Read the following descriptions of rocks and layers, and identify the likelihood of each being a good aquifer by grouping them into high and low likelihoods
Low:
Granite (igneous rock) with very few to no cracksGneiss (metamorphic rock that used to be granite and underwent intense pressure)High:
Unconsolidated gravel and sandConglomerate (sedimentary rock composed of various sizes of sediment such as pebbles and sand grains)Sandstone (sedimentary rock composed of sand grains)These are the following descriptions of rocks and layers.
Layers of rocks are also called strata (plural form of Latin strata), and stratigraphy is the science of strata. Stratigraphy deals with all the properties of layered rocks. We need to find out how these rocks relate to time.
Igneous rocks are formed from lava deep in the earth.
Sedimentary rocks are formed from layers of sand, silt, dead plants, and animal skeletons.
Metamorphic rocks are formed from other rocks that have been altered by subterranean heat and pressure.
Learn more about rocks and layers here: https://brainly.com/question/14545004
#SPJ4
2. If you send your soil out for a test and find out that it contains 75% silt and 25% clay, what kind of soil do you have
Answer:
if you send your soil out for a test and find out that it contains 75% silt and 25% clay, what kind of soil do you have?
Pure loamExplanation:
Pure loam is considered to be the best kind of soil for a farm or garden and is often defined as a soil with roughly equal proportions of sand, silt, and clay.
The best type of soil for growing plants is called loam soil. It is essentially a mix of soil that often contains equal amounts of clay, silt, and sand and offers the advantages of each with few drawbacks.
What are the features of loam soil?Sand, silt, and clay are present in loam soils in amounts that strike a balance between their stickiness and non-stickiness, making them moldable but not sticky.
Sand, clay, and silt particles combine to form loamy soils, which are thought to be the most fertile type of soil.
Sand lessens compaction and enhances drainage, while clay and silt particles enhance moisture retention. Neither do loamy soils become waterlogged in the winter, nor do they dry out in the summer.
Therefore, Pure loam, which is sometimes described as soil with nearly equal amounts of sand, silt, and clay, is thought to be the greatest sort of soil for a farm or garden.
Learn more about loam soil here:
https://brainly.com/question/17146975
#SPJ5
You are a podcaster for NPR (National Public Radio) and have been asked to lead a six-part series of podcasts on music of the past, broken into episodes on each of the commonly accepted eras of Medieval, Renaissance, Baroque, Classical, Romantic, 20th Century (one episode per era).
Medieval music includes liturgical music that was used for the church, secular music, non-religious music, etc.
How to explain the music?Renaissance music covered European music of the 15th and 16th centuries. The characteristics of Renaissance music are:
Music was based on modes.Richer texture.Blending rather than contrasting strands in the musical texture.Harmony.Baroque music is a period or style of Western classical music from approximately 1600 to 1750 that originated in Western Europe.
Classical music generally refers to the formal musical tradition of the Western world, considered to be distinct from Western folk music or popular music traditions.
Romantic music is a stylistic movement in Western Classical music and the characteristics of Romantic music are:
Freedom of form and design.Dramatic contrasts of dynamics.Learn more about music on:
https://brainly.com/question/26373912
#SPJ1
black activist who did not believe in accommodating racism and called for voting and education rights of african americans quizlet
Black activist who did not believe in accommodating racism and called for voting and education rights of African Americans was William Edward Burghardt Du Bois
Who was William Edward Burghardt Du Bois?William Edward Burghardt Du Bois was an American sociologist, socialist, historian, and Pan-Africanist civil rights campaigner.He was born on February 23, 1868, and he passed away on August 27, 1963.Du Bois, who was raised in a largely accepting and integrated community while growing up in Great Barrington, Massachusetts, completed his graduate work at Harvard University, where he became the first African American to receive a doctorate, and after becoming a professor of history, sociology, and economics at Atlanta University.The National Association for the Advancement of Colored People (NAACP) was founded in 1909, and Du Bois was one of its founders.Prior to this, Du Bois had gained national notoriety as the figurehead of the African-American activists known as the Niagara Movement, who fought for equal rights for black people.Du Bois and his followers criticized the Booker T. Washington-drafted Atlanta Compromise, which called for Southern Blacks to work and submit to White Political Rule in exchange for Southern Whites' assurance that Blacks would have access to fundamental educational and economic possibilities.Know more about William Edward Burghardt Du Bois
https://brainly.com/question/9716324
#SPJ4
The rigid portion of earth composed of the crust and the uppermost part of the is the?
The rigid portion of earth composed of the crust and the uppermost part of the mantle is the lithosphere.
The solid and outer part of the Earth is referred to as lithosphere. The lithosphere constitutes the brittle upper portion of the mantle and the crust which is the outermost layer amongst all the layers of Earth’s structure. The lithosphere can be further divided into two categories. One is the oceanic lithosphere and the other is continental lithosphere.
Oceanic lithosphere is associated with oceanic crust. They are found in the ocean basins. Continental lithosphere is associated with the continental crust.
Learn more about lithosphere here
https://brainly.com/question/14631600
#SPJ4
An almond or lens-shaped cloud which appears stationary, but which may contain winds of 50 knots or more, is referred to as?
An almond or lens-shaped cloud which appears to be stationarily is referred to as Lenticular Clouds.
What are these Lenticular clouds?
Almond- or lens-shaped clouds known as lenticular clouds are typically found on the leeward side of a mountain range. Despite appearing immobile, lenticular clouds may contain winds of 50 knots or more.
When the air is steady and winds are blowing across hills and mountains from the same or a comparable direction at different heights across the troposphere, these lens-shaped orographic wave clouds emerge.
Base elevation: 6,500–16,500 ftShape: Layers that are curved, like flying saucersAltocumulus lenticularis is Latin for "like a lens."No precipitationHow do Lenticular clouds form?
In certain situations, air blowing across a mountain range can create a train of enormous standing waves in the air downstream, similar to how ripples occur in a river when water runs over an obstruction.
If there is enough moisture in the air, the wave's upward motion will cause water vapour to condense, giving lenticular clouds their distinctive shape.
Hence, the correct answer is Lenticular clouds.
Learn more about Lenticular cloud here:
https://brainly.com/question/8570200
# SPJ1
If a person indeed has diabetes, the percentage of test results that represent a false negative is %. the percentage of test results that represent a false positive is %.
If a person indeed has diabetes, the percentage of test results that represent a false negative is 0.01%. the percentage of test results that represent a false positive is 0.15%.
What is diabetes?When someone has diabetes, their body either produces insufficient insulin or uses it improperly.
A chronic (long-lasting) medical disease called diabetes affects how the body converts food into energy.
The majority of the food we consume is converted by the body into sugar (glucose), which is then released into the circulation.
Learn more about diabetes:
https://brainly.com/question/504794
#SPJ1
A particularly cold winter in a region represents a change in climate.
a. True
b. False
A particularly cold winter in a region represents a change in climate is False
Climate change refers to long-term changes in temperature and weather patterns. These changes may be natural, for example, due to changes in the solar cycle. However, since the 19th century, human activity has been a major contributor to climate change, primarily through the burning of fossil fuels such as coal, oil, and gas.
Burning fossil fuels releases greenhouse gases that wrap around the earth like a blanket, trapping the sun's heat and raising temperatures. Examples of greenhouse gas emissions that cause climate change are carbon dioxide and methane. These are caused.
for example, by using gasoline to drive a car or by using coal to heat a building. Deforestation of land and forests can also release carbon dioxide. Landfills are a major source of methane emissions. Energy, industry, transportation, buildings, agriculture, and land use are the main sources of emissions.
Learn more about Climate change here: https://brainly.com/question/24793273
#SPJ4
The half of the globe containing the greatest amount of land surface, centered on western Europe is called the ___________.
Answer:
LAND HEMISPHERE IS THE ANSWER FOR THIS QUESTION.
PLEASE VOTE ME WITH 5 ⭐
How does the presence of a mid-ocean ridge most likely affect the nearby ocean currents
Which type of plants grow in desert climates?
a. xerophytic
b. chaparral
c. taiga
d. boreal forests
Xerophytic are the types of plants which grow in desert climates.
Xerophytes plants grow in areas with very little water in the soil and low amounts of rainfall. So, they are commonly found in deserts. Xerophytes such as cacti are capable of withstanding extended periods of dry conditions.
The Xerophytes plants grow in desert climates because they are able to withstand dry climates and also they have deep-spreading roots and capacity to store water which help them in the dry regions.
These Xerophytes plants have leaves with thorns which prevent loss of moisture. Also, their fleshy stems can store water. The xerophytic plants may also grow in salt marshes, frozen land area like the Arctic and Antarctic, or tropical forests.
Hence, option A is correct.
To learn more about the Xerophytes plants here:
https://brainly.com/question/432570
#SPJ4
In the lateral system of navigational aids, which buoy marks the channel on your port side when entering from the sea
The end of the canal is on the left of navigational aids.
Side markers are buoys and other markers that mark the edge of a safe body of water. Green, green lights, and odd numbers indicate the end of the channel on the harbor (left) side when entering from the open ocean or sailing upstream. The number usually increases as you go upstream.
Side systems are most common with red and green buoys. The Cardinal system is used to mark safe water near danger and features yellow and black buoys. Other auxiliary devices are used to guide the Pleasure Craft operator, and special buoys provide specific information.
The "SIDE" system is the well-known RED-RIGHT-RETURN system. That is, in all navigational aids, waters returning from the sea, even-numbered red markers are on the starboard side of the channel and are marked with odd-numbered green markers. The marker is on the port (left side) side of the channel.
Learn more about navigational aids at
https://brainly.com/question/27123679
#SPJ1
Which of the following orbit planets?
OA. Moons
OB. Dwarf planets
OC. Asteroids
OD. Comets
Answer:
A. Moons
Why do moons orbit planets instead of the sun?The basic reason why the planets revolve around, or orbit, the Sun, is that the gravity of the Sun keeps them in their orbits. In the same way, the Moon orbits the Earth because of the pull of Earth's gravity, the Earth orbits the Sun because of the pull of the Sun's gravity.
The moons are also pieces of the planets that could not be put together during planet creation and remained nearer to their respective planets as a result.
The gravitational force is inversely proportional to the square of the distance between the masses, as stated by the law of gravity. In case of the sun and the moons, the distance is greater than that between the planets and the moons. As a result, there is less gravitational pull between the planet and the moon. The moon is therefore considerably more likely to rotate around its own planet than the sun.
#SPJ1
Rolly and Leota are married and will file a joint return. They had combined wages of $256,000 in the tax year. This amount included $18,000 in net profit from a rental home. They had no other income or adjustments. What is their net investment income tax
The net investment income tax of Rolly and Leota combined equals to $540.
What is a net investment income tax?This refers to the tax that is applicable to income received from investment assets (before taxes) such as bonds, stocks, mutual funds, loans, and other investments.
This net investment income tax was imposed as through the passage of the Health Care and Education Reconciliation act 2010 and states that the Net investment income tax is liable to 3.80% tax and it applies to individuals have with an NII and MAGI above certain thresholds.
Net investment income tax= Net profit from rental income * 3.8%
= $18,000 * 3%
= $540
Therefore, the net investment income tax of Rolly and Leota combined equals to $540.
Read more about income tax
brainly.com/question/26316390
#SPJ1
Link 2 of the mechanism shown rotates about the z-axis w.r.t. the ground (Link 1) at a constant 2rad/s. Link 3 rotates about a pin joint currently aligned with the y-axis at a constant -3rad/s. What is the angular velocity of the link
The angular velocity of the link is going to be w₃₀ = -3j + 2k
What is angular velocity?This can be defined to mean the rate of change at which the angular position of a body would rotate. It is the time rate at which it known to revolve around an axis.
How to solve for the angular velocityThe angular velocity of the second link with respect to the ground is said to be w20 = 2k
That of link 3 is said to be w32 = -3j
We have to us formula of angular velocity to write the equation. This would be written as
w20 + w32
w30 = -3j + 2k
Complete questionLink 2 of the mechanism shown rotates about the z-axis w.r.t. the ground (Link 1) at a constant 2rad/s. Link 3 rotates about a pin joint currently aligned with the y-axis at a constant -3rad/s. What is the angular velocity of the link
Read more on angular velocity here:
https://brainly.com/question/6860269
#SPJ1
What component of gps includes the series of ground stations that help maintain gps?
The GPS control segment consists of a global network of ground facilities that track the GPS satellites, monitor their transmissions, perform analyses, and send commands and data to the constellation.
Most GPS receivers consist of three basic components: (1) An antenna that receives signals and, in some cases, has an anti-jamming function. (2) A receiver processor unit that converts wireless signals into usable navigation solutions. (3) Control/display unit that displays location information.
The third signal is also sent from the satellite to the receiver. This signal contains data about the state and position of the satellite. The second part of the GPS system is a ground station that consists of a receiver, an antenna, and communication tools for sending data to the data center.
Learn more about GPS here: https://brainly.com/question/9795929
#SPJ4
if you drew a cartogram emphasizing areas of high population density , what continents /parts of continents of the world would show up larger than they actually are ?
Answer:
Areas such as Asia, especially China and India, would have a lot of land, other areas could be Nigiria.
Explanation:
Both China and India have over a billion people, all useally in the urban areas, Nigiria has also had a huge population growth, and is on a projection to pass up the USA.
Hope this helps!
Having students substitute sounds for one another in a spoken word is an instructional activity that would be most appropriate for which students?
Having students substitute sounds for one another in a spoken word is an instructional activity that would be most appropriate for students who have a relatively high level of phonemic awareness.
Phonemic awareness refers to the particular ability to focus on and control individual sounds (phonemes) in spoken language. The smallest unit of spoken language is a phoneme. Phonemes combine to form syllables and words. For example, the word "bat" has his three phonemes of /b//a//t/. English has 44 phonemes, including sounds defined by letter combinations such as /th/.
Recognizing phonemes is important as it is the basis for spelling and word recognition. Phonemic awareness is one of the best ways to predict how well a child will learn to read and write in her first two years of school.
Know more about phonemic awareness here
https://brainly.com/question/895136
#SPJ1
In the electromagnetic spectrum, visible light occupies the band between 0.4 and 0.7:_____.
a. meters
b. feet
c. micrometers
d. millibars
e. Kelvins.
The electromagnetic spectrum, visible light occupies the band between 0.4 and 0.7 in "Micrometers"
The electromagnetic spectrum is the range of frequencies of electromagnetic radiation and their respective wavelengths and photon energies.
Electromagnetic radiation is consists of waves of the electromagnetic field, propagating through space, carrying electromagnetic radiant energy. It includes radio waves, microwaves, infrared, light, ultraviolet, X-rays, and gamma rays. All of these waves form part of the electromagnetic spectrum.
Electromagnetic radiation is produced whenever a charged particle changes its velocity i.e., whenever it is accelerated or decelerated. The energy of the electromagnetic radiation thus produced comes from the charged particle and is therefore lost as it gets discharged.
To learn more about Electromagnetic spectrum, here
https://brainly.com/question/23727978
#SPJ4
What is shap of the earth.
Answer:
The Earth is an irregularly shaped ellipsoid.
While the Earth appears to be round when viewed from the vantage point of space, it is actually closer to an ellipsoid. However, even an ellipsoid does not adequately describe the Earth's unique and ever-changing shape.