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What are the harmful effects of the sun?

Exposure to ultraviolet rays greatly increases a person's risk of skin cancer. According to the United States Environmental Protection Agency, the majority of skin cancers can be prevented by limiting exposure to the sun. Protecting the skin outdoors also goes a long way in preventing skin cancer. People should wear clothing that covers the skin or use a quality sunscreen before heading outdoors.Other harmful health effects of sun exposure include eye damage and skin damage. People exposed to the ultraviolet rays of the sun are more likely to develop cataracts, which in turn causes vision..

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How many electrons does beryllium have?

Using a periodic table, the number of electrons is found by finding the atomic number of beryllium, which is four. The atomic number is equal to the number of protons of a given element. However, the number of protons is also the same as the number of electrons for neutral atoms.Some other facts about the mineral beryllium is that its melting point is 2348.6 degrees Fahrenheit, and it has a density of 1.85 grams per cubic centimeter. In nature, beryllium is present in beryl and bertrandite.

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What is PLA plastic?

PLA plastic is primarily made from renewable sources, such as sugar, chips or starch and tapioca roots. It can be processed by sheet and film casting, spinning and extrusion injection molding, which provides access to many different materials. Because of its versatility, it can be used for medical implants, while also being usable in 3-D printers and the automotive industry.

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Where does the energy used to power the Calvin cycle come from?

According to the University of Cincinnati Clermont College, the light-dependent reaction occurs in the thylakoid membrane of chloroplasts in the plant cell. Chlorophyll, the green pigment within the membrane, and other colored pigments each absorb different wavelengths of the sunlight into their molecules. The energy is then transferred from each antenna pigment molecule to the central chlorophyll molecule, or reaction center, where photosynthesis begins. Once the energy reaches the reaction center, a specialized molecule called the primary acceptor captures an excited electron, which drives t..

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From what is limestone made?

Sedimentary rock refers to the fact that it is made up of sediment layers that are compacted. Limestone can be white or light-colored in appearance, and has a variable grain size. There are different limestone types, including oolite, chalk and travertine. The difference among these limestone types is the conditions under which they were formed. For example, travertine forms through evaporation in cave environments. The uses of limestone include the fabrication of lime and cement through a heating process.

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What is C12H22O11?

Sucrose occurs naturally in all fruits and vegetables. When plants undergo photosynthesis to transform energy from the sun into food, they create sucrose. Sugarcane and sugar beets offer the largest quantities of sucrose, making them common for commercial use in preparing refined sugar. Refining sugar requires pressing the vegetable matter to extract juice, boiling the juice to concentrate it to the point that crystals form and removal of the crystals using a centrifuge. These crystals of raw sugar still contain impurities and require further refining by washing and filtering to produce the wh..

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Why isn't it possible to see deeper than the photosphere?

NASA scientists have determined that the photosphere is roughly 500 kilometers thick. When they estimate the size of the sun, this layer is excluded. The sunlight that reaches Earth comes from the photosphere. That's also where sunspots are formed; these are slightly cooler dark areas that can last for hours or a few months.

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How thick is the Earth's inner core?

The Earth's inner core is directly beneath the mantle, which is a layer that consists of semi-solid minerals and rocks and a sheet of hot magma. The Earth's crust borders the mantle and is the outer most layer on the planet. The crust is a solid layer that is responsible for supporting all forms of biological life on Earth.

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What is the scientific name for seagrass?

T. testudinum is the most common type of seagrass found throughout the Caribbean and off the coast of Florida. It is distinguishable from other types of seagrass because of its long, broad blades.\nS. filiforme is the second most common seagrass found in Florida. H. wrightii is found from North Carolina to the Caribbean and also along the Gulf and Atlantic coasts.\nH. johnsonii is considered to be a threatened species because of its limited distribution. H. decipiens is found on the continental shelf. H. engelmanni is found in Texas, Florida, the Bahamas and the West Indies.\nR. maritima is fo..

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What is the metric unit of measure for the volume of a solid?

An individual can determine the volume of regular solids by multiplying their height in centimeters by their length in centimeters by their width in centimeters. For instance, a cube that is 10 centimeters long, 10 centimeters tall and 10 centimeters wide contains a volume of 1,000 cubic centimeters.\nTo measure the volume of an irregularly shaped object, water displacement is an effective technique. By placing an object in a graduated cylinder with a known quantity of water, the rise in the level of water indicates the volume of the object. For example, if a small rock is placed in a cylinder..

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