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19 Cards in this Set
- Front
- Back
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Scientific law |
A statement based on repeated experimental observations that describes some aspects of the universe. |
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Hypothesis |
A tentative explanation of some regularity of nature |
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Scientific theory |
A well-substantiated explanation of some aspect of the natural world that is acquired through the scientific method and repeatedly tested and confirmed through observation and experimentation |
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Law of conservation of mass |
atoms of an object cannot be created or destroyed, but can be moved around and be changed into different particles. |
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State of matter |
one of the distinct forms that matter takes on: solid, liquid, gas
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Physical change |
a change in the form of matter but not in its chemical identity |
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Chemical change |
a change in which one or more kinds of matter are transformed into a new kind of matter or several new kinds of matter |
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Distillation |
The separation of a liquid mixture into its components on the basis of differences in boiling points |
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Physical property |
a characteristic that can be observed for a material without chemical identity |
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Chemical property |
a characteristic of a material involving its chemical change |
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Substance |
a kind of matter than cannot be separated into other kinds of matter by any physical process |
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element |
substance that cannot be decomposed by any chemical reaction into simpler substances |
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compound |
substance composed of two or more elements chemically combined |
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mixture |
a material that can be separated by physical means into two or more substances |
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heterogeneous mixture |
mixture that consists of physically distinct parts, each with different properties.
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homogeneous mixture |
mixture that is uniform in its properties throughout given samples |
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phase |
one of several different homogeneous materials present in the portion of matter under study |
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decomposition reaction |
a reaction in which a single compound reacts to give two or more substances |
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allotrope |
one of two or more distinct forms of an element in the same physical state |
