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What is the Montreal Protocol?

Ozone is a compound consisting of three atoms of oxygen bonded together. Most of these molecules exist as a layer in the stratosphere blanketing the Earth. The ozone layer absorbs much of the harmful ultraviolet radiation coming from the sun, especially UV-B. In addition to its protective function, ozone insulates the Earth, keeping heat from escaping into space.\nThe use of ozone-depleting chemicals destroys ozone molecules. Because of scientific evidence pointing to the thinning of certain parts of the ozone layer around the world, nations of the world banded together to try to preserve the ..

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What is the function of flower petals?

Pollination is the means of reproduction in flowers. Pollinating insects, birds and animals hover over petals to gather pollen. This helps in the process of pollination. Some flowers have large, attractive blooms that release heavy scent. Other flower petals attract insects for food. Carnivorous plants use their petals to capture and absorb nutrition from insects. Examples of insect-eating plants are Venus flytrap and pitcher plants.The collection of petals surrounding the flower are called the corolla and behind them are often leaves called the sepals. Each flower can be either male, female o..

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Which volcanoes are located at hot spots?

Hot spots around the world give rise to seamounts. These hot spots, experts say, number between 40 and 50. They appear in all oceans of the world, including the Indian and Atlantic Oceans. In the Indian Ocean, one of the most active hot spots is the Reunion hot spot, which exists beneath the Reunion island. In the Atlantic Ocean, the hot spot called the Icelandic hot spot, which forms beneath Iceland, is the largest.Sometimes seamounts exist independently, but they also merge with one another, forming long chains. These chains typically form islands, which may rise above sea level. In the Unit..

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What are the uses for the lanthanide series?

Lasers are the most prevalent industrial use of lanthanide elements. Another important use of these elements is magnetic technology; samarium and neodymium compounds are used in powerful magnets. These magnets form essential components of radar and propulsion systems in military applications. Rare earth magnets are also used in hybrid cars and as educational toys.\nThere are 15 elements in the lanthanide group: lanthanum, cerium, praseodymium, neodymium, prometheum, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutetium. The group draws its name f..

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What are some interesting facts about gravity?

No one knows why gravity is so weak, but many scientists believe that if it was stronger or weaker than it is, the universe would be very different.\nIsaac Newton described gravity as a force that is related to mass and distance. The gravitational pull of massive bodies such as the sun is much greater than the gravitational pull of small bodies, such as humans. But the farther away two objects are from each other, the weaker the gravitational pull. The sun has a considerable gravitational pull on Earth, for example. It is only 93 million miles away. But the sun's gravitational pull on the..

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What are some natural resource issues covered by the South Carolina Department of Natural Resources?

The SCDNR issues and enforces regulations on all aspects of hunting, including licensing, bag limits and hunting areas. In July 2015, a new law reorganized the six games zones into four game zones.\nThe Department regulates freshwater and saltwater fishing throughout the state by issuing and enforcing regulations on all aspects of fishing, including licensing, fishing methods and devices, and fish size and possession limits. It also regulates state lakes and other matters related to water resources, such as boating and aquatic invasive plants and animals.\nThe SCDNR educates the public on cons..

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What happens when the brain is deprived of oxygen?

Hypoxic conditions can be caused from a lack of blood flow to the brain, or when blood reaches the brain but does not carry enough oxygen, according to NYU Langone Medical Center. Shock, heart problems and strokes may prevent blood from reaching the brain, while lung disease, carbon monoxide poisoning and traumatic events, such as drowning, cause the blood to become oxygen-depleted, even though it can reach the brain.\nWhile severe hypoxia often causes patients to fall into a coma or die, mild hypoxia can produce less serious symptoms. According to Heathline, temporary memory loss, difficulty ..

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What is an average wrist size?

To accurately calculate a person's wrist size is to measure it. Placing a soft measuring tape around the wrist bone and recording the information at the point where the measuring tape meets, results in the person's wrist size. If a soft measuring tape is unavailable, a string or ribbon may be used in it's place. The material can then be measured along a straight ruler to arrive at the person's wrist size. Whatever material is used, it is important to keep it snug, but not tight, for accurate results.

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What is an example of the law of multiple proportions?

Another example is the formation of water and hydrogen peroxide, or H2O and H2O2 respectively. The weight of hydrogen that combines with oxygen to form these two compounds bears a simple ratio. The law of multiple proportions is also observed in the formation of two oxides of nitrogen, namely NO and NO2. The law of multiple proportions was formulated by John Dalton in 1804. It is regarded as a very important law in chemistry as it determines the way elements combine to form compounds.

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Does ice melt faster in air or water?

The insulating effect of melted water around the ice may be of negligible value if the temperature of the air surrounding the ice is higher than the temperature of the water used for comparison. Higher temperatures can cause the ice to melt faster in either environment. Air currents may also speed up the melting of ice.

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