A:The sky ends at the Karman line, which is located at about 67 miles above sea level. Above this line, space begins. However, technically, the sky does not end so much as the atmosphere, or sky, thins until there is no oxygen left.
A:The meteorites that land on earth can be made of stone, iron or stony iron. A few meteorites are made of volcanic glass, but scientists aren't sure that all of these meteorites are extraterrestrial in nature. They believe some of these meteorites are formed when material from an impact crater liquefies and then turns to glass as it's ejected into the atmosphere.
A:A person who studies space is called an astronomer or astrophysicist. These types of scientists are responsible for the discovery of all of the planets, stars, asteroids and other extraterrestrial objects.
A:The general English definition of constellation is a group or configuration of objects, characteristics, ideas, feelings, etc, as in "a constellation of qualities." The noun constellation is used in astronomy, astrology and general English.
A:Astrolabes work by presenting users with a graphic interface that makes it relatively easy to compute the positions of the sun, the moon and the stars. Astrolabes can be used for navigation as well as predicting the exact times for sunrise and sunset. Turned on its side, an astrolabe can be used as a mechanical calculator akin to a slide rule.
A:Outer space contains a low density of particles, primarily hydrogen gas, along with electromagnetic radiation. Many people, however, mistakenly believe outer space is a complete vacuum. The term "outer space" is used mainly to distinguish the space between planets from the planets and their airspace.
A:A simple word equation that can be used to describe the process of photosynthesis is carbon dioxide + water —> glucose + oxygen + water. A balanced chemical equation for the process can be written as 6CO2 + 6H2O —> C6H12O6 + 6O2. Overall, photosynthesis uses light energy to convert carbon dioxide into a carbohydrate.
A:Nucleotides are the monomer of DNA. They are made of a 5-carbon sugar (deoxyribose), a phosphate group, and a nitrogenous base bound to the sugar. The four different types of nucleotides are adenine (A), thymine (T), guanine (G) and cytosine (C).
A:Penicillin treats middle ear infections, pneumonia, urinary tract infections, bronchitis and laryngitis, according to MedicineNet. The Free Dictionary claims that penicillin also treats skin infections, respiratory ailments and scarlet fever.
A:The human body has several mechanisms to store or eliminate excess glucose from the blood. Glucose can be converted into a larger molecule called glycogen that is typically stored in the liver and muscles. When the body needs glucose, glycogen is broken down to provide an energy source.
A:Body temperature is controlled through the process of thermoregulation, which allows the body to maintain a consistent temperature at its core. Homeostasis is the state which occurs when thermoregulation is successful.
A:Although fluid is sometimes used as an alternative word for liquid, air is treated as a fluid in the field of fluid mechanics. Objects moving through air encounter forces and experience conditions similar to objects traveling through liquids.
A:Most inorganic compounds do not contain carbon; however, in those inorganic substances that do contain carbon, carbon-hydrogen bonds are absent. Organic compounds always contain carbon and almost all have carbon-hydrogen bonds, according to About.com
A:Match heads contain phosphorus, potassium chlorate and sulfur, and when heated by friction, the phosphorus ignites, causing the other two materials to burn. When ignited, the potassium chlorate produces oxygen in amounts far exceeding what is typically found in the surrounding air. The oxygen and sulfur mixture burns steadily, igniting the matchstick to produce a usable flame.
A:The temperature at which wood combusts varies from 190 to 260 degrees Celsius. The ignition point of wood varies depending on the type of wood and the dryness of the wood. Decayed wood ignites at a temperature of 150 C.
A:The gases in air can be separated from one another through a process known as the fractional distillation of liquid air. This is a process that converts air into a liquid form and then allows it to be portioned out into layers and separated from one another. Because pure oxygen and nitrogen have a number of applications, this is a useful technique.
A:Refracting prisms take advantage of the fact that light makes changes in direction when passing from one material to another, but that different wavelengths bend different amounts. Thus, prisms can split white light, which is actually light made up of multiple wavelengths, coming in at one angle into its constituent colors going out at different angles. They can also do the opposite, condensing multiple color rays into one white ray.
A:The color orange is made from mixing red and yellow together. Orange is a secondary color, which means that it is made by mixing two primary colors together. The three primary colors are red, blue and yellow.
A:Refraction is the change in a wave's direction when it encounters a change in its transmission medium. The process of refraction allows eyes and lenses to form images. When the wave's medium changes, the velocity of the wave changes, but its frequency remains the same.