Science

A:

The scientific consensus is that the Earth's moon formed four and half billion years ago. About 100 million years after the formation of the solar system, another small planet is likely to have collided with the Earth, resulting in the formation of the Moon.

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    • Where does the sky end?

      Q: Where does the sky end?

      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.
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    • What is terrestrial navigation?

      Q: What is terrestrial navigation?

      A: Terrestrial navigation is a field of study that helps sea-faring people locate points at sea and on the land. Similarly, it involves being able to identify the position of the ship anywhere in the world. Students are instructed in the use of nautical charts, compass corrections and voyage planning.
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    • How did the constellation Orion get its name?

      Q: How did the constellation Orion get its name?

      A: Stargazers in ancient Greece observed the "pictures" formed by stars and named the Orion constellation after a mythological hunter. Many origin stories exist, but one popular version recounts Orion's quest to defeat a giant scorpion sent by Gaia, the goddess of Earth, according to the Windows to the Universe.
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    • What does seeing a shooting star mean?

      Q: What does seeing a shooting star mean?

      A: Seeing a shooting star means that a meteor is plummeting toward earth. The glowing appearance is caused when the meteor's surface catches on fire upon entering the Earth's atmosphere. A shooting star, therefore, is not actually a star.
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    • How big is Titan?

      Q: How big is Titan?

      A: Titan is 3,200.051 miles in diameter. It the second-largest moon out of hundreds in the solar system and is Saturn's largest. Titan's mass is 80 percent greater than that of the Earth's moon, and its diameter is 50 percent longer than the diameter of the Earth's moon.
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    • What is the farthest star from Earth?

      Q: What is the farthest star from Earth?

      A: Scientists will never know the farthest star from Earth, as the star is so far away that its light has not, nor will ever, have enough time to reach Earth. Even the stars within the visible universe are far too numerous to count, but the farthest one that humans have ever detected is about 55 million light years away. This incredibly distant star is called SDSS J 122952.66 +112227.8.
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    • How do living things use lipids?

      Q: How do living things use lipids?

      A: Lipids, or fats, are used in living things in a wide variety of different ways, including energy storage and insulation. There are other beneficial properties that lipids can be used for, however, such as digestion and helping provide structure for certain parts of the structure of an organism's cells. In some living things, lipids are even part of the process by which hormones are formed in the body.
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    • How is fungi spread?

      Q: How is fungi spread?

      A: Fungi spread by forcibly ejecting spores, making their own wind and allowing natural wind and water to spread their spores. Some spores have hair-like parts that help them disperse more easily in water. Some fungi use insects, such as flies, to help them spread their spores.
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    • How high can a killer whale jump out of the water?

      Q: How high can a killer whale jump out of the water?

      A: A killer whale, or orca, can jump between 10 and 15 feet out of the water. One of the highest whale jumps caught on film is that of an orca jumping 15 feet while chasing a dolphin.
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    • What is an example of commensalism?

      Q: What is an example of commensalism?

      A: One example of commensalism is the relationship between Patiria miniata, known as the Bat star, and a segmented worm called Ophiodromus pugettensis. The star has several grooves protruding from its mouth. Some Ophiodromus pugettensis worms live inside these grooves, but they do not harm the starfish.
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    • Where do praying mantises live?

      Q: Where do praying mantises live?

      A: Praying mantises live all around the world, with most living in warmer temperatures. They tend to choose environments where they can blend in, such as grassy and wooded areas, where they can match the environment to the color of their body to hide from animals that treat them as prey.
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    • What is the function of bony processes?

      Q: What is the function of bony processes?

      A: According to Right Diagnosis, bony processes are parts of bones that stick out from the main body of the bone, serving as attachment sites for muscles, ligaments or other connective tissues. Each of the different processes that exist in the body are named, such as the traverse processes, which are part of the vertebrae, as explained by KnowYourBack.org.
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    • What is the cost of the element mercury?

      Q: What is the cost of the element mercury?

      A: As of 2014, the element mercury costs between $2,950 and $3,075 per flask. A flask is equivalent to 76 pounds.
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    • What is the boiling point of sodium?

      Q: What is the boiling point of sodium?

      A: Sodium has a boiling point of 883 degrees Celsius or 1621 degrees Fahrenheit. It has a melting point of 97.72 degrees Celsius or 207.9 degrees Fahrenheit.
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    • What is the texture of helium?

      Q: What is the texture of helium?

      A: According to Elemental Matter, helium is a gaseous substance, and gases do not have texture. They do have other identifying qualities. Specifically, helium is a noble gas, which means that it is part of section 18 on the periodical table.
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    • Why do metals rust?

      Q: Why do metals rust?

      A: Many metals oxidize and corrode, but rust, or iron oxide, is specific to ferrous metals such as steel. Rust is formed when oxygen bonds with an atom of iron to form an iron oxide molecule. This molecule is considerably larger than the surrounding iron molecules, so it quickly becomes dislodged and flakes off the surface. This exposes fresh metal that can also rust.
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    • How is carbon stored in the biosphere?

      Q: How is carbon stored in the biosphere?

      A: Carbon is stored in the biosphere within living or recently dead plants, animals and microorganisms in the ocean and on land. Forests contain 86 percent of the planet's carbon on top of the ground. This biomass is released into the carbon cycle through natural decomposition and respiration.
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    • What is the use of chloroxylenol in Dettol antiseptic liquid?

      Q: What is the use of chloroxylenol in Dettol antiseptic liquid?

      A: The chloroxylenol in Dettol is an antimicrobial disinfectant used to kill bacteria and to prevent infections on minor scrapes, cuts or burns. The substance is commonly found in antibacterial soaps, but it is also used to control bacteria, algae and fungi on industrial surfaces where clean facilities are needed. Some liquids that contain chloroxylenol must be diluted before application on the human body.
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    • What colors mix to produce magenta?

      Q: What colors mix to produce magenta?

      A: The color magenta, which is a primary color according to Goethe's theory of color subtraction, is produced when blue and red are combined. This theory works on the principle that the components of white light can be subtracted by the secondary colors to create other colors. However, black color is produced when the secondary colors subtract all the components of white light.
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    • What is color intensity?

      Q: What is color intensity?

      A: Color intensity refers to how bright or dull a color looks, according to Art Studio Chalkboard. This term is most often used in art and photography but can also have other applications. Bright colors are considered more pure, while dull colors can appear indistinguishable or gray.
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    • What colors make white?

      Q: What colors make white?

      A: White is produced when all colors of the visible spectrum are combined. These colors are red, orange, yellow, green, blue, indigo and violet. They are the colors of the rainbow and can be easily remembered by the mnemonic ROY G BIV.
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    • What does the color silver symbolize?

      Q: What does the color silver symbolize?

      A: Silver is considered to be a feminine, lunar, peaceful, earthy, sophisticated and harmonious shade, but the significance of the color silver varies across cultures. The color silver has an element of mystery, and it is believed to purify people who wear it by draining negative energy. In some cultures, the color silver represents divine, transformational energy.
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    • What are the intermediate colors?

      Q: What are the intermediate colors?

      A: Intermediate colors are made up of yellow-orange, orange-red, red-violet, blue-violet, blue-green and yellow-green. These colors are combinations of both primary and secondary colors.
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    • What color does green and orange make?

      Q: What color does green and orange make?

      A: Green and orange make brown. Per Color Matters, green and orange are both secondary colors, meaning that they are made by mixing two primary colors. Mixing any two secondary colors yields a brown shade, from muddy brown to olive brown.
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