Name:rachel seah
Age:13++
Class: 2-2
blog:science purposes (Go science!:D)
Hi, this marks the work and research of various science topics during ACE Science Program from 2009 - 2010. Do have a look around and if there are various discrepancies, do inform me. :) Many thanks and cheers!
words would be too boring to explain so the video should explain. (PS: this guy put the mentos in the diet coke and the coke fountain was like twice the man's height!)
and then this video is where the mythbusters explain why it really happens, its about the surface of the mentos that causes the explosion:
rachel blogged on 11:49 PM
Filtration Used for separating a solid or suspension from a liquid eg separating SAND from water. Evaporation Used to obtain the solute from a solution eg for obtaining SALT from salty water Simple distillation Used to obtain the solvent from a solution eg for obtaining pure water from sea water Fractional distillation Used to separate one liquid from a mixture of different liquids that have different boiling points. Oxygen or nitrogen is obtained from air (a mixture of different gasses) by the fractional distillation of liquid air. Chromatography Used to separate out one colour from a mixture of colours eg for separating out the colours in black ink
This is an example of paper chromatography and this one has yellow, red,orange and blue
rachel blogged on 11:40 PM
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{Saturday, April 25, 2009 . }
Iodine under standard conditions is a shiny grey solid. It can be seen apparently sublimating at standard temperatures into a violet-pink gas that has an irritating odor. Students who have seen the classroom demonstration in which iodine crystals are gently heated in a test tube to violet vapor may gain the impression that liquid iodine does not exist at atmospheric pressure. This misconception arises because the vapor produced has such a deep colour that the liquid appears not to form. In fact, if iodine crystals are heated carefully to just above their melting point of 113.7 °C, the crystals melt into a liquid which is present under a dense blanket of the vapor.Iodine naturally occurs in the environment chiefly as a dissolved iodide in seawater, although it is also found in some minerals and soils.
Here's a video about how to make iodine crystals:
rachel blogged on 2:27 AM
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{Monday, April 6, 2009 . }
The words on the periodic table were quite small in the worksheet but your science book,page 74 shows an enlarged version of it(phew). so here are the first 20 elements in the periodic table:
Remember the element song ms liang showed us and lisa said the words were too fast?i saw this video and i think they slow motioned it a bit,listen to it and tell me what you think. :D
Lyrics: There's antimony, arsenic, aluminum, selenium, And hydrogen and oxygen and nitrogen and rhenium And nickel, neodymium, neptunium, germanium, And iron, americium, ruthenium, uranium, Europium, zirconium, lutetium, vanadium And lanthanum and osmium and astatine and radium And gold, protactinium and indium and gallium And iodine and thorium and thulium and thallium.
There’s yttrium, ytterbium, actinium, rubidium And boron, gadolinium, niobium, iridium And strontium and silicon and silver and samarium, And bismuth, bromine, lithium, beryllium and barium.
There’s holmium and helium and hafnium and erbium And phosphorous and francium and fluorine and terbium And manganese and mercury, molybdinum, magnesium, Dysprosium and scandium and cerium and cesium And lead, praseodymium, and platinum, plutonium, Palladium, promethium, potassium, polonium, Tantalum, technetium, titanium, tellurium, And cadmium and calcium and chromium and curium.
There’s sulfur, californium and fermium, berkelium And also mendelevium, einsteinium and nobelium And argon, krypton, neon, radon, xenon, zinc and rhodium And chlorine, carbon, cobalt, copper, Tungsten, tin and sodium.
These are the only ones of which the news has come to Harvard, And there may be many others but they haven’t been discovered.
