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What is height above sea level?

Local mean sea level is determined by taking hourly measurements of sea levels over a 19-year period and then averaging the measurements. Global warming is melting glaciers and ice sheets, causing an elevation in sea levels, explains National Geographic. Sea level rise may threaten low-lying nations, such as Comoros and Maldives. New York City and Mumbai, which are coastal cities, also must prepare for high sea levels.

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What are the rings around Neptune made of?

One of Neptune’s rings, Adam, has an uneven distribution of rocks and dust. This causes the appearance of three arcs within the ring. Astronomers name the arcs Liberty, Equality and Fraternity. Scientists believe the arcs are due to the gravitational pull of one of Neptune’s moons, Galatea, which is inside orbit of the rings, explains the National Aeronautic and Space Association. The ring is the farthest ring from the planet. Astronomers count five rings and up to four arcs, primarily from satellite imagery.

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What are some types of vegetation in Jamaica?

The island of Jamaica has tropical vegetation, which consists of fruit trees, such as bananas, mangoes, Ackee, pineapple and tamarind. Jamaica also has natural hardwoods, such as mahogany, pine and ebony. There are a number of different plants and flowers in Jamaica, including palms, bougainvillea, canna lilies, daisies and hibiscus.\n\nWide varieties of orchids are grown on this island, with over 200 species available. Jamaica is also home to different types of crop plants, like cocoa, corn, yams and sweet potatoes. Other crops grown in Jamaica are pimento, ginger, sugar cane and oranges.

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What does the prefrontal cortex do?

According to an article in the journal Brain, scientists still have many questions about the function of the prefrontal cortex. In contrast to people who have sustained damage to the rear lobes of the brain and lose obvious and predictable functions, those with damage to the prefrontal cortex often exhibit puzzling changes. In many patients with lesions in the prefrontal cortex, intellectual ability is not affected. However, such patients often experience serious behavioral changes, and planning and reasoning are often greatly impaired.\nAccording to Wikipedia, the prefrontal cortex carries ou..

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Burning wood in a fire is an example of what type of reaction?

True combustion reactions always involve molecular oxygen gas, which is has two bonded oxygen atoms. Most substances that combust are biological in origin and frequently have some combination of carbon, hydrogen and oxygen in their composition, just like wood. However, other non-biological substances can and do undergo combustion. Some metals, such as magnesium, also combust, producing metal oxides.

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What does a boysenberry tree look like?

Garden Guides explains that the flowers of the boysenberry are white, with five petals and a burst of stamen and pistils in the center of the flower. Flowers typically begin showing in early spring in most parts of the United States. Boysenberries are a self-pollinating fruit, meaning they have both the male and female reproductive parts present on the flower, states Garden Guides.\nOnce flowers fade, boysenberries are identifiable by their fruit, which grows in an aggregate of drupelets around a large central seed. Before ripening, boysenberries are green in color and hard. The fruit grows to..

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Where can you find uranium?

Uranium is about as abundant as tin and is more abundant than mercury, silver or gold. The ores it is mined from typically have it in very low concentrations of around 0.1 percent. Some mines in Canada, however, have ores which are as high as 20 percent uranium. Such high levels are very dangerous to mine because of the radioactivity of uranium; special measures must be taken to protect both the miners and the environment. Ores with more typical concentrations do not pose such a threat.\nUranium mining is somewhat easier than many other types of mining because radiation sensors can detect uran..

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How is the atmosphere heated?

There are three ways the sun heats the atmosphere.Radiation The sun constantly emits radiation, which is stronger on some days than others. This radiation moves in straight lines, and as the Earth is in their path of trajectory they enter the Earth's atmosphere. It is thanks to the Earth's axis that the radiation distributes in a way that allows most of the planet to remain habitable. Most of the radiation that enters the Earth's atmosphere is absorbed, while the remainder provides heat.Conduction A small amount of heat moves through the Earth's atmosphere via conduction. ..

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What is the underground stem of a fern?

Because the rhizome is very short, the leaves are the more visible parts of a fern. These leaves are called fronds and are often clumped together. They die at the end of each growing season. Fronds differ greatly in size, growing up to 3 feet in length in some species. Fronds may also grow along the rhizome, which is less common than the clumped formation.

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What is the charge of NO2?

The charge of a NO2 ion is typically indicated with minus sign written in superscript at the end of the formula. The different charges on ions are based on the number of protons compared to the number of electrons. For example, an oxygen ion carrying a charge of minus two has two more electrons than it does protons. Protons carry a positive charge and electrons carry a negative charge.

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