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I am not completely sure but when things are hot-e.g boiled water, atoms are whizzing round freely like they are excited, this is partly why the water goes bubbly and boily. As for fixed objects such as a rock, the atoms are very close together and they barely move at all because they are so closely bound.
Moving on to answering your question: So if you freeze a glass of water the immediate reason should be the atoms come closer together, I have taken a wild guess but i think that this is why scientists say ice is smaller after being frozen from its normal form water/fluid [Actually, water is an exception concerning freezing. It expands due to the tetrahedral shape of hydrogen bonds between the water molecules. It produces a very rigid but "open" structure with large spaces, decreasing the density - This is why ice floats.] Therefore, at the molecular level when a substance freezes.It is kind of like slowing down what's being frozen's heartbeat.As the atoms cool they come closer together, (kind of like huddling together to keep warmth), their movements slow and they contract, ( e.g, if you were ever cold you would know how it feels, you would want to contract. Kind of like going into the foetal position. So your body would want to contract as an immediate response. The reason you aren't huddling is because your body-heat is not floating away into the atmosphere to be absorbed but is instead is absorbed by your blankets so as you contract, you slowly get back your body-heat.). So the answer is-when a substance is frozen, the molecules contract*, slowing down their movements so what was fluid is now fixed as a solid.
This question was answered by Jono, a 12 year old, third grader (turd)-lol, living in Southern Hemisphere, New Zealand, South Island.-I hope i answered your question whole and fully. >.< :P You can e-mail me at:burntfishistasty@gmail.com
^_^ XD
*The intermolecular forces and bonds increase in number and strength, "pulling" the molecules closer together.
Wiki User
∙ 14y ago
Wiki User
∙ 15y agoatoms and molecules continue to move because "heat is everpresent" The only time molecular motion ceases is at absolute zero.
Wiki User
∙ 13y agoThe molecules of a substance vibrate more slowly, until finally enough thermal energy is lost that the substance changes from a liquid to a solid.
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The greenhouse effect is caused on a molecular level by the greenhouse gases combing, thus forming the greenhouse effect and that's what causes it to be on a molecular level.
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0 C is 0 degrees Celsius. Pure water freezes at this temperature. 100 C is the temperature when pure water boils at sea level.
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The bonds between molecules are broken, and the molecules move freely, with a lesser degree of bonding (with no bonding at all you get a gas rather than a liquid).
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The temperature at which a mixture freezes is called the freezing point. For instance, water freezes at 32 degrees F. at sea level.
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The centigrade or Celsius scale in which water freezes at 0 and boils at 100 degrees at sea level.
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By definition, a homogeneous mixture is a substance that is uniform at the molecular level. An example of this is salt water.
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Increase
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what happens at the molecular level when water evaporates?
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Increasing temperature means increased kinetic energy on the atomic or molecular level. Temperature of a given substance is the average kinetic energy of the particles of which that substance is composed.
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The state of matter changes from a liquid to a gas. (But the one word answer that the assignment is looking for is vaporization.)
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the amylase degrades the starch
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Yes, that's basically what happens at the atomic or molecular level.
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It is a chemical change because it is irreversible and the change happens on a molecular level.
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The energy transferred is heat. On a molecular level it is kinetic energy, but what we observe on a macroscopic level is temperature.
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Basically Atomic Level is either a factor which causes an affect on a particular substance in order to change its shape and molecular structure.
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Grain Size of the steel get changed. Steel Become more hard and it become brittle.
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Molecular genetics is the field of Biology and genetics that studies the structure and function of genes at a molecular level.
