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What is a stratovolcano?

In addition to having a picturesque appearance with pointed summits (except in the case of those volcanoes that have recently erupted, like Mt. St. Helens), stratovolcanoes usually consist of multiple vents and erupt with a variety of magma types. Stratovolcanoes are built by lava flows, tephra and pyroclastic flows, and they usually have very small craters except in the cases of stratovolcanoes like Mt. St. Helens that have recently "blown their tops" so to speak. St. Helens lost a significant part of its peak in its 1980 eruption due to a lateral blast.\nAccording to Oregon State University,..

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What are gaps in rock layers called?

Rock layers are usually dated using their specific fossil content, which is arranged in an order known as erroneous evolution. Geological columns are not considered to be accurate history, but rather a statement of evolution. There is, however, some truth contained in geological columns. Geological columns are used to present rock records through different ages. It may seem authoritative, but it is not recommended by the Institute for Creation Research to rely on these too much.

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How many ATP are produced in the Krebs cycle?

During the process of aerobic respiration, one molecule of glucose is first broken down into two molecules of pyruvate. Before entering the Krebs cycle, the pyruvate is modified into acetyl coenzyme A. The acetyl-CoA is first combined with molecules already in the Krebs cycle and then undergoes a series of energy-releasing reactions. The remaining molecule is then combined with a new acetyl-CoA, restarting the cycle.

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Is CCl4 polar or non-polar?

Polarity arises from a difference in electronegativity. The chlorine molecule is more electronegative than the carbon and attracts the bonding electrons more strongly. The uneven distribution of electrons in the C-Cl bond makes it polar, with the chlorine being negative.\nThe four bonds are arranged around the carbon like the legs and neck of a camera tripod. This is called tetrahedral geometry. The four polar bonds in this geometry negate each other's effects, resulting in a non-polar molecule.

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What is the rarest blood type in the United Kingdom?

There are four primary blood groups: O, A, B and AB. In addition, people are either Rh negative or Rh positive, this means there are eight blood types present in the population:A Rh positive or A Rh negativeB Rh positive or B Rh negativeO Rh positive or O Rh negativeAB Rh positive or AB Rh negativeIn the U.K., the most common blood group is O positive, with 44 percent of people carrying it. A further 42 percent have A, 10 percent have B and 4 percent have AB. Around 85 percent are Rh positive, and 15 percent are Rh negative. The type of blood a person has determines what type of blood they can..

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How many neutrons does gallium have?

Gallium was first isolated in 1875 by Paul-Émile Lecoq de Boisbaudran, though its existence was first suggested by Dmitri Mendeleyev. It was named after Gallia, which is the Latin name for France. Gallium is a metal that can melt at levels near room temperature. It is used in as the measuring device in high temperature thermometers. Gallium is also used in the production of semiconductors.

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What are the major organs of the respiratory system?

The lungs are the main organ of the respiratory system, which carries oxygen through the body by means of red blood cells and picks up carbon dioxide, a waste gas, to expel from the body when an organism exhales. The trachea filters the inhaled air and branches into the bronchi, where the air tubes carry air directly into the lungs. The diaphragm is the main muscle of the respiratory system, contracting to increase the volume of the lungs and carry air into the body and expanding to force air out of the lungs.

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What are reforestation projects?

Drought, insect infestations, plant diseases, fires and human actions devastate forests and woodlands and lead to deforestation. When natural regeneration fails, such as after high-intensity wildfires, native flora cannot reestablish itself, and invasive plants take its place. In some areas, agricultural and industrial activities lay waste to the area. Replanting native trees and seedlings returns these areas to their former states. Projects typically involve the planting of different types of seedlings and trees to ensure that the new forest has the same level of biodiversity as the old one.\..

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How do fossil fuels damage the environment?

Fossil fuels include coal, gasoline, diesel fuel, propane and natural gas. All of these fuels were created as organisms decayed and released carbon-rich compounds into the surrounding soil and rock over thousands of years. Humans access these resources through a variety of means, including drilling deep holes and mining coal from pits. Additionally, a process called “fracking” is used to remove reserves that are otherwise difficult to access. Fracking injects high-pressured water into bedrock to free the oil and gas inside. If the chemicals from the process contaminate the water table, wid..

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What is a Chinese seismograph?

Scientists have attempted to replicate the Chinese seismograph but don't know what was inside of Hêng's brass container. They have tried several approaches but have been unsuccessful in recreating a device that is accurate in predicting the direction of the disturbance, for which the device became famous. While records show the Chinese used the instrument for four centuries after its invention, there is no physical evidence that it ever existed. Some Chinese writers question if the machine was possible.\nHistorians have no record of Europeans working to develop seismographs until 17..

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