Answer:
The Moon is Earth's only natural satellite. At about one-quarter the diameter of Earth (comparable to the width of Australia),[15] it is the largest natural satellite in the Solar System relative to the size of its planet,[f] the fifth largest satellite in the Solar System overall, and is larger than any dwarf planet. Orbiting Earth at an average distance of 384,400 km (238,900 mi),[16] or about 30 times Earth's diameter, its gravitational influence slightly lengthens Earth's day and is the main driver of Earth's tides. The Moon is classified as a planetary-mass object and a differentiated rocky body, and lacks any significant atmosphere, hydrosphere, or magnetic field. Its surface gravity is about one-sixth of Earth's (0.1654 g); Jupiter's moon Io is the only satellite in the Solar System known to have a higher surface gravity and density.The Moon's orbit around Earth has a sidereal period of 27.3 days. During each synodic period of 29.5 days, the amount of visible surface illuminated by the Sun varies from none up to 100%, resulting in lunar phases that form the basis for the months of a lunar calendar. The Moon is tidally locked to Earth, which means that the length of a full rotation of the Moon on its own axis causes its same side (the near side) to always face Earth, and the somewhat longer lunar day is the same as the synodic period. That said, 59% of the total lunar surface can be seen from Earth through shifts in perspective due to libration.[17]
The most widely accepted origin explanation posits that the Moon formed about 4.51 billion years ago, not long after Earth, out of the debris from a giant impact between the planet and a hypothesized Mars-sized body called Theia. It then receded to a wider orbit because of tidal interaction with the Earth. The near side of the Moon is marked by dark volcanic maria ("seas"), which fill the spaces between bright ancient crustal highlands and prominent impact craters. Most of the large impact basins and mare surfaces were in place by the end of the Imbrian period, some three billion years ago. The lunar surface is relatively non-reflective, with a reflectance just slightly brighter than that of worn asphalt. However, because it has a large angular diameter, the full moon is the brightest celestial object in the night sky. The Moon's apparent size is nearly the same as that of the Sun, allowing it to cover the Sun almost completely during a total solar eclipse.
Answer:
At 12 Z (7 am EST) on 13 March 1993, observations of the surface analysis map indicate a cold air mass lying to the west and northwest of the surface low (well behind the cold front).
Explanation:
On that day, the storm known as "storm of the century" occurred, where a hot front caused the creation of several tornadoes and a cyclone originating in the Gulf of Mexico, with high-speed winds that extended as far as Florida.
Greenland and Iceland are two islands in the Atlantic, located on high latitudes, but despite being very close, they are very different in many respects.
Explanation:
Greenland and Iceland are two islands located in the northern part of the Atlantic Ocean. Iceland has been discovered by the Vikings, while Greenland by the Tuli, though the first Europeans that set foot on it and gave it the name are the Vikings. The names of these two islands are misleading though, and that has actually been done on purpose.
When the Vikings discovered Iceland and Greenland, they noticed the big difference between them. Iceland had far better living conditions. It was mostly green, covered with grasses and coniferous forests, and the waters around it were relatively good for sailing. Greenland, on the the other side, was almost entirely covered with thick layer of ice. There was no fertile soil for agriculture. What was not covered in ice was barren land covered with rock debris. The waters around it were also dangerous for sailing because of the icebergs.
The first expedition of Vikings decided to name the islands opposite to what they are, and the purpose of it was to make the next expeditions go to Greenland, thus to have less competition for the better island. The Vikings that settled in Iceland managed to survive over the centuries and still do nowadays, while the ones that got stuck on Greenland, after short and hard period of existence, ended up massacred by the Tuli people.
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Answer:
Salinity means the degree of dissolved salt content in water
Explanation:
In a world without global warming, water in seas or in oceans is salty or saline due to the influx or of rivers and various other sources that bring the water and other geomaterial from the landscapes like soils and various other clays and mud deposits. On an average the sea water consists of about 35 (ppt) part per thousand. mostly of Na and CL ions. More saline the water is more will be its density and less saline water is less is its density thus, freshwater has least density, as compared to the red sea and other sea with more than 37 ppt density. Rainfall is also an important factor in reducing the amount of saltiness.
Simply because Jews have never been completely equal, completely
welcome, or completely safe in anyone else's country.
The so-called "Zionist" movement was started by visionaries who
foresaw that Jews would never be completely equal, welcome,
and safe anywhere except their own country, and it was time to get
serious about returning to their country that the Romans drove them
out of, almost 2,000 years ago.