chemistry
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| chemistry | the study of composition, structure, properties, and reactions of matter
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| Matter | another word for all substances that make up our world.
Antacid tablets are matter.
Water is matter.
Glass is matter.
Air is matter.
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| Chemicals | substances that have the same composition and properties wherever found
often substances made by chemists that you use every day
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| graph | represents the relationship between two variables
contains two perpendicular axes
has a horizontal axis or x axis
has a vertical axis or y axis
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| Is light a chemical | no
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| Measured numbers | the numbers obtained when you measure a quantity such as your height, weight, or temperature.
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| significant figures (SFs | all the digits including the estimated digit.
used to represent the amount of error associated with a measurement
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| Exact numbers | not measured and do not have a limited number of significant figures
do not affect the number of significant figures in a calculated answer
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| The amount of space occupied by a substance is its | volume
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| Equalities | use two different units to describe the same measured amount
ex: 60 min=1 h or 1m=100cm
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| Solids | a definite shape
a definite volume
particles that are close together in a fixed arrangement
particles that move very slowly
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| Liquids | an indefinite shape but a definite volume
the same shape as their container
particles that are close together but mobile and move slowly
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| Gases | an indefinite shape
an indefinite volume
the same shape and volume as their container
particles that are far apart but move very fast
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