T.Y Science Term 1 by Lee https://padlet.com/Leemarie00/x4do05xekv62 Things I have learned en-us 2016-11-22 18:40:22 UTC 2024-04-14 20:06:55 UTC hello@padlet.com Why do things vanish in the Bermuda triangle ? Leemarie00 https://padlet.com/Leemarie00/x4do05xekv62/wish/135060894  Over the last few centuries, it’s thought that dozens of ships and planes have disappeared under mysterious circumstances in the area, earning it the nickname “The Devil’s Triangle.” People have even gone so far as to speculate that it’s an area of extra-terrestrial activity or that there is some bizarre natural scientific cause for the region to be hazardous; but most likely, it’s simply an area in which people have experienced a lot of bad luck—the idea of it being a “vortex of doom” is no more real than Bigfoot or the Loch Ness Monster]]> 2016-11-03 13:11:44 UTC https://padlet.com/Leemarie00/x4do05xekv62/wish/135060894 What was the Columbia ? Leemarie00 https://padlet.com/Leemarie00/x4do05xekv62/wish/139444518 The Columbia was a NASA space shuttle which was used for space missions. it launched for the last time on January 16th 2003.]]> 2016-11-22 18:47:28 UTC https://padlet.com/Leemarie00/x4do05xekv62/wish/139444518 Columbia disaster ... Leemarie00 https://padlet.com/Leemarie00/x4do05xekv62/wish/139446844 On Feb. 1, 2003, space shuttle Columbia broke up as it returned to Earth, killing the seven astronauts on board. NASA suspended space shuttle flights for more than two years as it investigated the disaster.
An investigation board determined that a large piece of foam fell from the shuttle's external tank and fatally breached the spacecraft wing. This problem with foam had been known for years, and NASA came under intense scrutiny in Congress and in the media for allowing the situation to continue.

]]> 2016-11-22 18:54:44 UTC https://padlet.com/Leemarie00/x4do05xekv62/wish/139446844 To use a standard solution of sodium hydroxide to distinguish between 2 samples of hydrochloric acid of different concentrations ... Leemarie00 https://padlet.com/Leemarie00/x4do05xekv62/wish/139448637 2016-11-22 19:00:31 UTC https://padlet.com/Leemarie00/x4do05xekv62/wish/139448637 To measure the rate of oxygen gas production ... Leemarie00 https://padlet.com/Leemarie00/x4do05xekv62/wish/139460090 2016-11-22 19:45:43 UTC https://padlet.com/Leemarie00/x4do05xekv62/wish/139460090 what is mach ? Leemarie00 https://padlet.com/Leemarie00/x4do05xekv62/wish/139460564 In dry air at 20 degrees Celsius, the speed of sound is 340.3 m/s .The speed represented by mach 1 is not a constant; for example, it is mostly dependent on temperature.]]> 2016-11-22 19:47:36 UTC https://padlet.com/Leemarie00/x4do05xekv62/wish/139460564 How to balance chemical equations ? Leemarie00 https://padlet.com/Leemarie00/x4do05xekv62/wish/139477626 Practice always makes perfect. In general, to balance an equation, here are the things we need to do: Count the atoms of each element in the reactants and the products. Use coefficients; place them in front of the compounds as needed.]]> 2016-11-22 21:16:26 UTC https://padlet.com/Leemarie00/x4do05xekv62/wish/139477626 Why does our hair turn gray ? Leemarie00 https://padlet.com/Leemarie00/x4do05xekv62/wish/139480694 When we go gray, our bodies are bleaching our hair from the inside out.
Everyone's body makes hydrogen peroxide naturally. The buildup eventually gets so colossal that it blocks the melanin -- your body's natural hair dye. Without that melanin, the hairs turn gray, then eventually white. And just like that, we're old.
]]> 2016-11-22 21:45:10 UTC https://padlet.com/Leemarie00/x4do05xekv62/wish/139480694 Is it stress that turns our hair gray ? Leemarie00 https://padlet.com/Leemarie00/x4do05xekv62/wish/139480975 2016-11-22 21:48:01 UTC https://padlet.com/Leemarie00/x4do05xekv62/wish/139480975 Whats faster ? Light or sound ? Leemarie00 https://padlet.com/Leemarie00/x4do05xekv62/wish/139481381 Light travels at a considerably higher speed than sound . Light travels at a constant speed of 186,000 miles per second, but the speed of sound is only 761.2 mph.]]> 2016-11-22 21:51:56 UTC https://padlet.com/Leemarie00/x4do05xekv62/wish/139481381 mach Leemarie00 https://padlet.com/Leemarie00/x4do05xekv62/wish/140453234 mach 1 = 1062 km/h]]> 2016-11-29 11:27:29 UTC https://padlet.com/Leemarie00/x4do05xekv62/wish/140453234 NASA's Kepler Discovers First Earth-Size Planet In The 'Habitable Zone' of Another Star Leemarie00 https://padlet.com/Leemarie00/x4do05xekv62/wish/140454214 NASA's Kepler Space Telescope, astronomers have discovered the first Earth-size planet orbiting a star in the "habitable zone" -- the range of distance from a star where liquid water might pool on the surface of an orbiting planet. The discovery of Kepler-186f confirms that planets the size of Earth exist in the habitable zone of stars other than our sun.]]> 2016-11-29 11:33:04 UTC https://padlet.com/Leemarie00/x4do05xekv62/wish/140454214 Balancing equations... Leemarie00 https://padlet.com/Leemarie00/x4do05xekv62/wish/140454863  In general, to balance an equation, here are the things we need to do: Count the atoms of each element in the reactants and the products. Use coefficients; place them in front of the compounds as needed.]]> 2016-11-29 11:36:30 UTC https://padlet.com/Leemarie00/x4do05xekv62/wish/140454863 Reactions that produce oxygen... Leemarie00 https://padlet.com/Leemarie00/x4do05xekv62/wish/140458009 2 H2O2 → 2 H2O + O2


]]> 2016-11-29 11:53:32 UTC https://padlet.com/Leemarie00/x4do05xekv62/wish/140458009 Reaction between sodium hydroxide and hydrochloric acid... Leemarie00 https://padlet.com/Leemarie00/x4do05xekv62/wish/140459487 HCl + NaOH = NaCl + H2O 
This is a neutralization reaction that produces a salt called sodium chloride (table salt) and water.]]> 2016-11-29 12:03:22 UTC https://padlet.com/Leemarie00/x4do05xekv62/wish/140459487 Columbia space shuttle crew ... Leemarie00 https://padlet.com/Leemarie00/x4do05xekv62/wish/140461432 Commander: Rick D. Husband, a U.S. Air Force colonel and mechanical engineer, who piloted a previous shuttle during the first docking with the International Space Station (STS-96).
Pilot: William C. McCool, a U.S. Navy commander.
Payload Commander: Michael P. Anderson, a U.S. Air Force lieutenant colonel, physicist, and mission specialist who was in charge of the science mission.
Payload specialist: Ilan Ramon, a colonel in the Israeli Air Force and the first Israeli astronaut.
Mission Specialist: Kalpana Chawla, an Indian-born aerospace engineer who was on her second space mission.
Mission Specialist: David M. Brown, a U.S. Navy captain trained as an aviator and flight surgeon. Brown worked on scientific experiments.
Mission Specialist: Laurel Blair Salton Clark, a U.S. Navy captain and flight surgeon. Clark worked on biological experiments.

]]> 2016-11-29 12:16:12 UTC https://padlet.com/Leemarie00/x4do05xekv62/wish/140461432 Is there extraterrestrial life in the universe ? Leemarie00 https://padlet.com/Leemarie00/x4do05xekv62/wish/140462781 At the moment, life on Earth is the only known life in the universe, but there are compelling arguments to suggest we are not alone. Indeed, most astrophysicists accept a high probability of there being life elsewhere in the universe, if not on other planets or on moons within our own solar system.]]> 2016-11-29 12:22:59 UTC https://padlet.com/Leemarie00/x4do05xekv62/wish/140462781 Is it real ?? Leemarie00 https://padlet.com/Leemarie00/x4do05xekv62/wish/140464216 For ages, people have been hearing about the Loch Ness monster and how it baffled everyone thinking that it is a creature unlike any other. There have been many sightings over the years and photos and videos of actual footage have been checked and looked at time and time again, confirming if it could be some kind of sea serpent or a descendant of the dinosaurs. Even up today, as some are claiming, it still exists and swims under the waters.]]> 2016-11-29 12:30:25 UTC https://padlet.com/Leemarie00/x4do05xekv62/wish/140464216 Black Dahlia ... Leemarie00 https://padlet.com/Leemarie00/x4do05xekv62/wish/140464632 22-year old Elizabeth Short was very active at promoting herself into showbiz at the time the Black Dahlia murder occurred, however, no one knew of the killer or who actually did the murder."The Black Dahlia" was a nickname given to Elizabeth Short an American woman who was the victim of a much-publicized murder in 1947. Short acquired the moniker posthumously from newspapers in the habit of nicknaming crimes they found particularly lurid. The "Black Dahlia" nickname may have been derived from a film noir murder mystery, The Blue Dahlia, released in April 1946. Short was found mutilated, her body sliced in half at the waist, on January 15, 1947, in Leimert Park, Los Angeles, California. Short's unsolved murder has been the source of widespread speculation, leading to many suspects, along with several books, television and film adaptations of the story. Short's murder is one of the oldest unsolved murder cases in Los Angeles history.]]> 2016-11-29 12:32:40 UTC https://padlet.com/Leemarie00/x4do05xekv62/wish/140464632 Are ghosts real? Leemarie00 https://padlet.com/Leemarie00/x4do05xekv62/wish/141971495 Ghosts are a particular manifestation of a belief in life after death. Though the specifics vary among groups, a ghost is generally understood to be the disembodied spirit or soul of a once-living person. Sometimes the spirit belongs to a deceased animal.
A ghost is said to linger on earth when the person died in a traumatic way, or when his burial ritual was disturbed before it was complete, or sometimes just because the spirit feels like it. Pesky or disruptive ghosts are called poltergeists. Some groups believe that ghosts are actually demons, or evil angels.
Not all belief systems around the world allow for spirits or souls that linger on earth after death, but some do. In fact, many do. The concept is popular in spiritualist circles and many Christian faiths as well. With so many theologies that allow for an immediate spiritual life after death, it is no wonder that ghosts are so popular.]]> 2016-12-06 11:26:51 UTC https://padlet.com/Leemarie00/x4do05xekv62/wish/141971495 is it a fruit of veg ? Leemarie00 https://padlet.com/Leemarie00/x4do05xekv62/wish/141972469 It looks like a vegetable, but it's classified as a fruit. Or is it the other way around? The tomato is technically a fruit since it protects and contains the seeds of its plant, but according to a Supreme court ruling, is is classified as a vegetable.]]> 2016-12-06 11:33:25 UTC https://padlet.com/Leemarie00/x4do05xekv62/wish/141972469 why is the sky blue ? Leemarie00 https://padlet.com/Leemarie00/x4do05xekv62/wish/141973461 Much like our veins appear blue, it has everything to do with wavelengths and blue light Blue light scatters more than the other colors in the spectrum because it travels as shorter, smaller waves.]]> 2016-12-06 11:41:28 UTC https://padlet.com/Leemarie00/x4do05xekv62/wish/141973461 poltergeists Leemarie00 https://padlet.com/Leemarie00/x4do05xekv62/wish/141974122 A ghost or other supernatural being supposedly responsible for physical disturbances such as making loud noises and throwing objects about.]]> 2016-12-06 11:46:33 UTC https://padlet.com/Leemarie00/x4do05xekv62/wish/141974122 what is the deadliest poison ? Leemarie00 https://padlet.com/Leemarie00/x4do05xekv62/wish/141974686 Polonium...
Discovered in 1898, the radioactive element Polonium was the cause of death of Yasser Arafat, the Palestinian leader and Russian dissident. Polonium is amongst the deadliest poisons of the 21st century. It has no use in biological science since it is extremely lethal to all living organisms. Its most common form is Polonium 210, which is allegedly 250,000 times more deadly than hydrogen cyanide. This explains why the Americans employed its toxicity in the World War II to bring down Nagasaki in what they called the Manhattan Project's Dayton Project. In theory, a gram of Polonium 210 could wipe out 10 million people if ingested, injected or inhaled. If the radiation doesn’t kill you, then you are likely to get cancer.]]> 2016-12-06 11:50:27 UTC https://padlet.com/Leemarie00/x4do05xekv62/wish/141974686