Dimensional Analysis

Front

Dimensional Analysis Noun

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[di-men-shun-ul uh-nal-uh-sis]

Back

Dimensional Analysis

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A problem-solving technique that uses the cancellation of units to obtain the correct solution, also known as the Unit Factor Method.

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Example: This diagram shows how to use dimensional analysis to convert units, like changing 24 inches to feet by multiplying with a conversion factor and canceling units.

Front

Metric System Noun

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[met-rik sis-tuhm]

Back

Metric System

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The international standard system of measurement, also known as SI, which is built upon seven fundamental base units for scientific use.

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Example: This image displays the seven base units of the metric system (SI units), each with its name, symbol, and a helpful icon.

Front

Base Unit Noun

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[beys yoo-nit]

Back

Base Unit

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A fundamental unit in a system of measurement upon which other derived units are based, such as the meter for length.

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Example: This interactive-style chart shows fundamental physical quantities, like length and mass, and prompts the user to match them to their corresponding SI base units.

Front

SI Prefix Noun

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[es-ahy pree-fiks]

Back

SI Prefix

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A word or symbol placed before a unit that multiplies that unit by a specific power of 10, like kilo- or milli-.

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Example: This chart shows common SI prefixes (like kilo-, centi-, milli-), their corresponding power-of-10 values, and a mnemonic to remember their order for unit conversions.

Front

Conversion Factor Noun

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[kuhn-vur-zhuhn fak-ter]

Back

Conversion Factor

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A ratio or fraction that is numerically equivalent to one and is used to convert a quantity from one unit to another.

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Example: To convert units, multiply by a conversion factor, a fraction equal to one (e.g., 12 in / 1 ft), to cancel the old unit and get the new one.

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Mole Noun

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[mohl]

Back

Mole

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The SI base unit for the amount of a substance, representing exactly 6.022 x 10^23 elementary entities or particles.

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Example: This image shows that one mole is a specific quantity, defined as the number of atoms in exactly 12 grams of carbon-12.

Front

Molar Mass Noun

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[moh-ler mas]

Back

Molar Mass

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The mass of one mole of a chemical substance, which is typically expressed in units of grams per mole (g/mol).

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Example: This image shows how to find the molar mass of a water molecule (H₂O) by adding the atomic masses of its two hydrogen and one oxygen atoms.