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Manson, Iowa
Manson is a city in Calhoun County, Iowa, United States. The population was 1,709 at the time of the 2020 census. History Manson was platted in 1872 on the Dubuque and Sioux City Railroad line. Tornado of June 28, 1979 A destructive F4 tornado killed three people and destroyed a large part of Manson on June 28, 1979, at about 7:45 PM. The tornado slowly chewed its way from northwest to southeast through Manson. The tornado was on the southwest side of a large southeast-moving thunderstorm complex; thus, it was surrounded on three sides by clear skies (in fact, the sun was shining) and was highly visible. Severe damage was done to the central business district with 25 of the 35 business either destroyed or severely damaged. The middle school was also destroyed as were about 110 homes. Another 139 homes were damaged. The General Telephone Company exchange building for Manson was completely destroyed - the first time this had ever happened in Iowa. It was reported that the storm w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
City
A city is a human settlement of a substantial size. The term "city" has different meanings around the world and in some places the settlement can be very small. Even where the term is limited to larger settlements, there is no universally agreed definition of the lower boundary for their size. In a narrower sense, a city can be defined as a permanent and Urban density, densely populated place with administratively defined boundaries whose members work primarily on non-agricultural tasks. Cities generally have extensive systems for housing, transportation, sanitation, Public utilities, utilities, land use, Manufacturing, production of goods, and communication. Their density facilitates interaction between people, government organisations, government organizations, and businesses, sometimes benefiting different parties in the process, such as improving the efficiency of goods and service distribution. Historically, city dwellers have been a small proportion of humanity overall, bu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meteorite
A meteorite is a rock (geology), rock that originated in outer space and has fallen to the surface of a planet or Natural satellite, moon. When the original object enters the atmosphere, various factors such as friction, pressure, and chemical interactions with the atmospheric gases cause it to heat up and radiate energy. It then becomes a meteor and forms a Meteoroid#Fireball, fireball, also known as a shooting star; astronomers call the brightest examples "Bolide#Astronomy, bolides". Once it settles on the larger body's surface, the meteor becomes a meteorite. Meteorites vary greatly in size. For geologists, a bolide is a meteorite large enough to create an impact crater. Meteorites that are recovered after being observed as they transit the atmosphere and impact event, impact Earth are called meteorite falls. All others are known as meteorite finds. Meteorites have traditionally been divided into three broad categories: stony meteorites that are rocks, mainly composed of sil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pacific Islander Americans
Pacific Islander Americans (also colloquially referred to as Islander Americans) are Americans who are of Pacific Islander ancestry (or are descendants of the Indigenous peoples of Oceania). For its purposes, the United States census also counts Aboriginal Australians as part of this group. Pacific Islander Americans make up 0.5% of the US population including those with partial Pacific Islander ancestry, enumerating about 1.4 million people. The largest ethnic subgroups of Pacific Islander Americans are Native Hawaiians, Samoan Americans, Samoans, and Chamorro people, Chamorros. Much of the Pacific Islander population resides in Hawaii, Alaska, California, Utah, and Texas. Pacific Islanders may be considered Oceanian Americans, but this group may include Australians and New Zealander-origin people, who can be of non-Pacific Islander ethnicity. Many Pacific Islander Americans are mixed with other races, especially Europeans and Asians, due to Pacific Islanders being a small p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asian Americans
Asian Americans are Americans with Asian diaspora, ancestry from the continent of Asia (including naturalized Americans who are Immigration to the United States, immigrants from specific regions in Asia and descendants of those immigrants). Although this term had historically been used for all the indigenous peoples of the continent of Asia, the usage of the term "Asian" by the United States Census Bureau denotes a racial category that includes people with origins or ancestry from East Asia, South Asia, Southeast Asia, and Central Asia. It excludes people with ethnic origins from West Asia, who were historically classified as 'white' and will be categorized as Middle Eastern Americans starting from the 2030 United States census, 2030 census. Central Asians in the United States, Central Asian ancestries (including Afghans, Afghan, Kazakhs, Kazakh, Kyrgyz people, Kyrgyz, Tajiks, Tajik, Turkmens, Turkmen, and Uzbeks, Uzbek) were previously not included in any racial category but h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Native Americans In The United States
Native Americans (also called American Indians, First Americans, or Indigenous Americans) are the Indigenous peoples of the Americas, Indigenous peoples of the United States, particularly of the Contiguous United States, lower 48 states and Alaska. They may also include any Americans whose origins lie in any of the indigenous peoples of North or South America. The United States Census Bureau publishes data about "American Indians and Alaska Natives", whom it defines as anyone "having origins in any of the original peoples of North and South America ... and who maintains tribal affiliation or community attachment". The census does not, however, enumerate "Native Americans" as such, noting that the latter term can encompass a broader set of groups, e.g. Native Hawaiians, which it tabulates separately. The European colonization of the Americas from 1492 resulted in a Population history of Indigenous peoples of the Americas, precipitous decline in the size of the Native American ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
African Americans
African Americans, also known as Black Americans and formerly also called Afro-Americans, are an American racial and ethnic group that consists of Americans who have total or partial ancestry from any of the Black racial groups of Africa. African Americans constitute the second largest ethno-racial group in the U.S. after White Americans. The term "African American" generally denotes descendants of Africans enslaved in the United States. In 2023, an estimated 48.3 million people self-identified as Black, making up 14.4% of the country’s population. This marks a 33% increase since 2000, when there were 36.2 million Black people living in the U.S. African-American history began in the 16th century, with Africans being sold to European slave traders and transported across the Atlantic to the Western Hemisphere. They were sold as slaves to European colonists and put to work on plantations, particularly in the southern colonies. A few were able to achieve freedom th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
White Americans
White Americans (sometimes also called Caucasian Americans) are Americans who identify as white people. In a more official sense, the United States Census Bureau, which collects demographic data on Americans, defines "white" as "[a] person having origins in any of the original peoples of Europe, the Middle East, or North Africa". This group constitutes the majority of the people in the United States, although their proportion of the overall population has been White demographic decline, gradually declining. As of the latest American Community Survey in 2023, the US Census Bureau estimates that 60.5% of the US population, or 202,651,650 people, are White alone, while Non-Hispanic whites, Non-Hispanic Whites make up 57.1% of the population. Overall, 72.3% of Americans identify as White alone or in combination. European Americans are by far the largest panethnic group of white Americans and have constituted the majority population of the United States since the nation's founding. M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Population Density
Population density (in agriculture: Standing stock (other), standing stock or plant density) is a measurement of population per unit land area. It is mostly applied to humans, but sometimes to other living organisms too. It is a key geographical term.Matt RosenberPopulation Density Geography.about.com. March 2, 2011. Retrieved on December 10, 2011. Biological population densities Population density is population divided by total land area, sometimes including seas and oceans, as appropriate. Low densities may cause an extinction vortex and further reduce fertility. This is called the Allee effect after the scientist who identified it. Examples of the causes of reduced fertility in low population densities are: * Increased problems with locating sexual mates * Increased inbreeding Human densities Population density is the number of people per unit of area, usually transcribed as "per square kilometre" or square mile, and which may include or exclude, for example, ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Census
The United States census (plural censuses or census) is a census that is legally mandated by the Constitution of the United States. It takes place every ten years. The first census after the American Revolution was taken in 1790 United States census, 1790 under United States Secretary of State, Secretary of State Thomas Jefferson. There have been 24 federal censuses since that time. The census includes territories of the United States. The United States Census Bureau is responsible for conducting the census. The 2020 United States census, most recent national census took place in 2020; the next census is scheduled for 2030. Since 2013, the Census Bureau began discussions on using technology to aid data collection starting with the 2020 census. In 2020, every household received an invitation to complete the census over the Internet, by phone or by paper questionnaire. For years between the decennial censuses, the Census Bureau issues estimates made using surveys and statistical mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Till
image:Geschiebemergel.JPG, Closeup of glacial till. Note that the larger grains (pebbles and gravel) in the till are completely surrounded by the matrix of finer material (silt and sand), and this characteristic, known as ''matrix support'', is diagnostic of till. image:Glacial till exposed in roadcut-750px.jpg, Glacial till with tufts of grass Till or glacial till is unsorted glacier, glacial sediment. Till is derived from the erosion and entrainment of material by the moving ice of a glacier. It is deposited some distance down-ice to form terminal, lateral, medial and ground moraines. Till is classified into primary deposits, laid down directly by glaciers, and secondary deposits, reworked by fluvial transport and other processes. Description Till is a form of '' glacial drift'', which is rock material transported by a glacier and deposited directly from the ice or from running water emerging from the ice. It is distinguished from other forms of drift in that it is de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chicxulub Crater
The Chicxulub crater is an impact crater buried underneath the Yucatán Peninsula in Mexico. Its center is offshore, but the crater is named after the onshore community of Chicxulub Pueblo (not the larger coastal town of Chicxulub Puerto). It was formed slightly over 66 million years ago when an asteroid, about in diameter, struck Earth. The crater is estimated to be in diameter and in depth. It is believed to be the second largest impact structure on Earth, and the only one whose peak ring is intact and directly accessible for scientific research. The crater was discovered by Antonio Camargo and Glen Penfield, geophysicists who had been looking for petroleum in the Yucatán Peninsula during the late 1970s. Penfield was initially unable to obtain evidence that the geological feature was a crater and gave up his search. Later, through contact with Alan R. Hildebrand in 1990, Penfield obtained samples that suggested it was an impact feature. Evidence for the crater's imp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
