laboratory vocab, reactions
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each of the black spaces below before clicking
on it to display the answer.
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| Atom | The smallest unit of matter
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| Element | Multiple atoms of the same kind put togehter
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| Compound | Multiple different atos put together.
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| Heterogeneous | Sand and water in a container (can be separated)
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| Mixtures | Made up of 2 different substances
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| Suspension | A substance that takes a long time to separate (blood)
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| Homogenous | Every atom is the same type/size (Kool-Aid)
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| Methods of separation for heterogenous mixtures | filter, distillation, magnet
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| Methods of separation for homogenous mixtures | a lot of other complex methods
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| Method of separation for heterogenous suspension mixtures | centrifugation
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| Physical change | ex: water+heat>water vapor
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| chemical change | ex: Ka&H202
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| Accuracy | A measure of how close a measurement comes to the actual value of whatever is measured
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| precision | a measure of how close a series of measurements are to one another
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| percent error | used to determine the accuracy of measurements
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| percent error equation | (|measured-theoretical| / theoretical) * 100
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| Meniscus | Low point of water's surface tension
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| Purpose of using scientific notation | used to simplify #s that are too big or small to easily work with
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| Alchemists | precursor to the chemist
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| Processes that alchemists developed | separating mixtures, purifying chemicals
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| Lavoisier | father of chemistry who designed a balance that could measure mass to the nearest 0.0005 gram
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| scientific method | observe, hypothesis, experiment, analyze data, accept/reject hypothesis, publish experiment
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| Difference between a theory and a law | Theory=long explanation; changeable. Law= short; equations can come from laws
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| qualitative measurement | smell, touch, sight
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| quantitative measurement | measurements
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| Metric system | M k h da _ d c m
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| Density | Intensive property that depends only on the composition of a substance, not on the size of the sample.
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| Equation for density | mass/volume. ans must have the least sig figs
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