chapter 8-physics

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1.
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Different types of _____ have different characteristics.
2.
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They melt and ________ at different temperatures.
3.
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Characteristics that you can see through direct observation are called ____________ properties.
4.
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Substances can often be ______ by their physical properties.
5.
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A physical ____ is any change in size, shape, or phase of matter in which the identity of a substance does not change.
6.
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__________ changes are reversible.
7.
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The change can easily be reverses by _________ the water.
8.
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Bending a steel _______ is another physical property.
9.
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Properties that can only be observed when one substance changes into a _________ substance are called chemical properties.
10.
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A chemical property of _________ is that it reacts with oxygen in the air to form iron oxide (rust).
11.
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___________ is the ratio of mass to volume.
12.
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Density is a __________ of solids, liquids, and gases.
13.
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TO find the density of a material, you can _________ its mass by its volume.
14.
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You can calculate mass if you know ________ and volume.
15.
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The densities of a steel nail and a steel cube are the __________.
16.
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Solids have a wide range of _____________.
17.
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The density of air and other ___________ is much lower.
18.
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The density of a material depend on two _________.
19.
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One is the individual mass of each ________ or molecule.
20.
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Density also depends on how ____________ the atoms and molecules are packed.
21.
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The atoms or molecules in a solid are arranged in two _______.
22.
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If the particles are arranged in an orderly, repeating ________, the solid is called crystalline.
23.
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If the particles are arranged in a _______ way, the solid is amorphous.
24.
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Most solids on Earth are ________.
25.
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The word amorphous comes from the _________ for "without shape."