Lecture Notes: Chemistry, Measurements, and SI Units

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A vocabulary-style set of flashcards covering key concepts from chemistry, measurements, SI units, and accuracy vs. precision.

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16 Terms

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Chemistry

The science of matter and its changes; described as a way of life and present in everyday activities like cooking and making tea.

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Measurement

The process of determining the size, amount, or extent of something using units (mass, length, time, temperature, etc.).

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SI units

International System of Units; global standard for measurements used to ensure consistency in data reporting.

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Base SI units

The fundamental SI units: kilogram (mass), meter (length), second (time), and kelvin (temperature).

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Kilogram

SI base unit of mass.

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Meter

SI base unit of length (symbol m).

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Second

SI base unit of time (symbol s).

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Kelvin

SI base unit of temperature (absolute scale, symbol K).

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Gram

Metric unit of mass; 1 kilogram = 1000 grams.

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Milliliter

Unit of volume equal to 1 cubic centimeter; 1 L = 1000 mL.

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Derived units

Units formed from base units by combining them (e.g., speed is distance per time: m/s or mph).

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Speed / Velocity

Distance per unit time; common units include m/s and mph.

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Fahrenheit

Temperature scale used in the Fahrenheit system (symbol F).

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Celsius

Temperature scale used in the Celsius system (symbol C).

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Accuracy

How close a measured value is to the true value.

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Precision

How close multiple measurements are to each other (consistency).