Is sand a liquid or a solid?
539751
Its a solid. Its actually a packed bed of solid particles, but its a solid. You can make it behave like a liquid by buddling gas through it within certain limits, but its still a solid.\n\nthe definitions of solid and liquid are :\n\nA solid deforms by a finite amount proprtional to the stress placed upon it.\n\nA liquid deforms constantly undes stress.\n\nExample : \n\nif you put a 1 lb weight on a table, the top of the table will deform slighly. You amy not see it, but if you make it 100 lbs you might even see the mark after you take it off. (Dont try this at home, your mother / life partner will kill you). However, it won't go right through the table (unless you use a very big weight, but thats called breaking not deforming)\n\nIf you put a 1 lb weight on water, it will fall until it hits the bottom, and at a very constant speed. (this only works if the density of the 1 lb weight is higher than that of water, otherwise it provides no stress to the system, so no smart answers about 1 lb of wood please).\n\nsand with a whole lot of water in it sometimes behaves like water (quicksand, and its not as dramatic as the movies claim), but thats the water doing that, not the sand.\n\ndoes that help?
598488
Solid.  If the temperature is below the melting point, then it will be a solid.  Unless you want to get into changing pressures, or something.
188053
Solid\nLiquid\nGas\n\nThere is one more, actually. Its called Plasma
1044414
Other substances that have a solid less dense than their liquid include the elements bismuth, gallium, and germanium.  Bismuth has a liquid density of 10.05g/cm^3, and a solid density of only 9.78g/cm^3.  Gallium has a liquid density of 6.095g/cm^3, but a solid density of 5.91g/cm^3.  Finally, germanium has a liquid density of 5.60g/cm^3 and a solid density of 5.323g/cm^3.\n\nJust for comparison, water has a liquid density of about 1.0g/cm^3 and a solid density of 0.917g/cm^3.\n\nI think I have heard of other materials that also posses this unusual property, but I can't remember them off the top of my head.  I hope this has been helpful.
653146
C. Silicon (sand) and oxygen (think of all of the air and water(h2o)
480536
should be glass. unless in its original form of sand than should be water. Remember Super-man made that huge piece of glass to reflect the sun an blind those crazy alien people!
418813
Sand is made up of tiny bits of a mineral known as quartz.
448017
a suspension is a liquid and a solid in which the solid is in suspension in the liquid.  a good example is something like dirt and water.  the dirt is a solid and it is suspended in the water.  a colloid is a misture of two liquids.  an example is water and alcohol.  the alcohol is slightly soluble in water and so they make a colloid.
654657
Quicksand is an interesting natural phenomenon -- it is actually solid ground that has been liquefied by an over saturation of water. The "quick" refers to how easily the sand shifts when in this semi liquid state.\n\nQuicksand is not a unique type of soil; it is usually just sand or another type of grainy soil. Quicksand is nothing more than a soupy mixture of sand and water -- in essence, the sand is floating on water. It can occur anywhere under the right conditions.\nQuicksand is created when water saturates an area of loose sand and the ordinary sand is agitated. When the water trapped in the batch of sand can't escape, it creates liquefied soil that can no longer support weight. There are two ways in which sand can become agitated enough to create quicksand:\n\n    * Flowing underground water - The force of the upward water flow opposes the force of gravity, causing the granules of sand to be more buoyant.\n    * Earthquakes - The force of the shaking ground can increase the pressure of shallow groundwater, which liquefies sand and silt deposits. The liquefied surface loses strength, causing buildings or other objects on that surface to sink or fall over. \n\nVibration tends to enhance the quickness, so what is reasonably solid initially may become soft and then quick,\n\nThe vibration plus the water barrier reduces the friction between the sand particles and causes the sand to behave like a liquid. To understand quicksand, you have to understand the process of liquefaction. When soil liquefies, as with quicksand, it loses strength and behaves like a viscous liquid rather than a solid causing buildings to sink significantly during earthquakes.\n\nWhile quicksand can occur in almost any location where water is present, there are certain locations where it's more prevalent. Places where quicksand is most likely to occur include:\n\n    * Riverbanks\n    * Beaches\n    * Lake shorelines\n    * Near underground springs\n    * Marshes \n\nThe next time you're at the beach, notice the difference in the sand as you stand on different parts of the beach that have varying levels of moisture. If you stand on the driest part of the beach, the sand holds you up just fine. The friction between the sand particles creates a stable surface to stand on.\n\nIf you move closer to the water, you'll notice that the sand that is moderately wet is even more tightly packed than the dry sand. A moderate amount of water works to increase the friction between sand particles. This is what allows you to build sand castles.\n\nBut beach sand could easily become quicksand if enough water were thrust up through it. If an excessive amount of water flows through the sand, it forces the sand particles apart. This separation of particles causes the ground to loosen, and any mass on the sand will begin to sink through it. In the next section, you will find out how to save yourself if you happen to fall into a pit of quicksand. \n\nhe human body has a density of 62.4 pounds per cubic foot (1 g/cm3) and is able to float on water. Quicksand is denser than water -- it has a density of about 125 pounds per cubic foot (2 g/cm3) -- which means you can float more easily on quicksand than on water. The key is to not panic. Most people who drown in quicksand, or any liquid for that matter, are usually those who panic and begin flailing their arms and legs.\n\nIt may be possible to drown in quicksand if you were to fall in over your head and couldn't get your head back above the surface, although it's rare for quicksand to be that deep. Most likely, if you fall in, you will float to the surface. However, the sand-to-water ratio of quicksand can vary, causing some quicksand to be less buoyant.\n"By the same token, if the quicksand were deep, as in up to your waist, it would be very difficult to extract yourself from a dense slurry, not unlike very wet concrete. "The weight of the quicksand would certainly make it difficult to
56527
Believe it or not, glass is actually considered a liquid.  But, it flows very very very slowly over time.  That is why, eventually, windows and mirrors are a bit thicker at the bottom than at the top.
518364
liquids and gases only.\nparticles must be able to move around to form convection currents and solid particles are not free to move about.
583234
bulk density /(moisture content - 1) is equal to dry density.\n\nBulk density = weight of wet soil collected from the hole / volume of the hole\n\nVolume of hole = wt. of sand transferred into hole / bulk density of sand\n\nWeight of sand = Total wt of sand in cylinder before pouring - (wt of sand in cylinder after pouring+wt of sand in cone)\n\nBulk density of sand and wt. of sand in cone are determined in laboratory. for details on that write to nobodyat34@yahoo.co.in
447957
The solid phase.  Water is an exception.\nAlso some materials has more than one solid phase, such as carbon which has different structures and therefore different densities for graphic as opposed to diamond.
364066
solid-most dense\nliquid-middle dense\ngas- least dense
996200
not sure about sand, but water washes away your natural lubricant so it can hurt alot sometimes and the water can also make you prone to bacteria.
184098
has to do with intermolecular bonds. The bonds that hold a solid together are more ridgid than that of a liquid.
1031001
You could class them as soft solids, since they do not flow. They may be very viscous liquids... but solid is the closest definition.\n\nThe are not truley fluid {which means "gas or liquid" in Physics}, since I can put it in a bowl and it won't coat the bottom.