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| what is changed when matter undergoes a physical change |
the shape of the object will change. a stick of butter will change because it is melted. |
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angela Thu, 05 May 2011 22:11:00 GMT |
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| when a substance undergoes a physical change its ___________ does not change |
identity |
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angela Thu, 05 May 2011 22:11:00 GMT |
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| is molding a piece of silver a physical change |
yes |
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angela Thu, 05 May 2011 22:11:00 GMT |
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| is dissolving sugar in water a physical change |
yes |
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angela Thu, 05 May 2011 22:11:00 GMT |
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| is melting an ice cube a physical change |
yes |
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angela Thu, 05 May 2011 22:11:00 GMT |
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| is crushing an aluminum can a physical change |
yes |
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angela Thu, 05 May 2011 22:11:00 GMT |
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| is baking bread a physical change |
no |
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angela Thu, 05 May 2011 22:11:00 GMT |
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| Is sanding a piece of wood a physical change |
yes |
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angela Thu, 05 May 2011 22:11:00 GMT |
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| what kind of changes are melting and freezing |
they are both a physical change because if you freez water, it is still water. if you melt something you can refreez it and it will became a icecube again |
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angela Thu, 05 May 2011 22:11:00 GMT |
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| a change that only affects the physical properties of a substance is known as a (n) |
physical change |
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angela Thu, 05 May 2011 22:11:00 GMT |
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| what are two reasons why density is useful property for identifying substances |
each substance has a density that differs from the densities of other substances, and the density of a substance is always the same at a given temperature and pressure. |
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angela Thu, 05 May 2011 22:11:00 GMT |
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| The units for density take the form of a mass unit divided by a (n)_______unit. |
volume |
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angela Thu, 05 May 2011 22:11:00 GMT |
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| objects such as a cotton ball and a small tomato can occupy similar voulmes but vary greatly in |
density |
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angela Thu, 05 May 2011 22:11:00 GMT |
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| what do D, V, and m stand for in the equation for density |
D stands for dinsity
V stands for voulme
m stands for mass |
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angela Thu, 05 May 2011 22:11:00 GMT |
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| what is the equation for density |
mass divied my volume |
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angela Thu, 05 May 2011 22:11:00 GMT |
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| how will knowing the density of a substance help you determine whether an object made from that material will float in water |
if the object has a greater density of water it would sink, and if tit has less density it will float |
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angela Thu, 05 May 2011 21:26:24 GMT |
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| what will happen to a solid object made from matter with a greater density than water when it is dropped into water |
the object would sink because the object's density is nore that the water's density. |
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angela Thu, 05 May 2011 21:26:24 GMT |
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| Why would 1 kg of lead be less awkward to carry around that 1 kg of feathers |
it would be less awkward to carry the lead, because the lead would be a block and there would be a lot of feathers to carry |
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angela Thu, 05 May 2011 21:26:24 GMT |
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| where will the least dense liquid be found |
It would be found at the top of the cylinder |
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angela Thu, 05 May 2011 21:26:24 GMT |
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| which layer of liquid would settle on the bottom |
the layer of liquid with the highest density |
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angela Thu, 05 May 2011 21:21:16 GMT |
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| if you pour different liquids into a graduated cylinder, the liquids will form layers based upon differences in the _____________ of each liquid. |
density |
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angela Thu, 05 May 2011 21:21:16 GMT |
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| density is the __________________ that describes the relationship between mass and volume. |
physical property |
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angela Thu, 05 May 2011 21:21:16 GMT |
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| a golf ball has more mass than a table tennis ball |
density |
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angela Thu, 05 May 2011 21:21:16 GMT |
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| an onion gives off a very distinctive smell |
odor |
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angela Thu, 05 May 2011 21:21:16 GMT |
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| flavored drink mix dissolves in water |
solubility |
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angela Thu, 05 May 2011 21:21:16 GMT |
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| plastic foam protects you from hot liquid |
thermal conductivity |
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angela Thu, 05 May 2011 21:21:16 GMT |
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| copper can be pulled into thin wires |
ductility |
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angela Thu, 05 May 2011 21:21:16 GMT |
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| an ice cube floats in a glass of water |
state |
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angela Thu, 05 May 2011 21:21:16 GMT |
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| Aluminum can be flattened into sheets of foil |
malleability |
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angela Thu, 05 May 2011 21:21:16 GMT |
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| Some examples of physical propeties are |
color, odor, and magnetism |
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angela Thu, 05 May 2011 21:21:16 GMT |
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| A characteristic of matter that can be observed or measured without changing the identity of the matter is a |
physical property |
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angela Thu, 05 May 2011 21:21:16 GMT |
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