Grade 7 Unit 4 Topic 3: Structures and Forces - Mass

Vocabulary flashcards covering the concepts of mass, primary standards, kilograms, and measurement units from Grade 7 Unit 4 Topic 3: Structures and Forces.

Mass

The amount of matter in a substance or item, measured with a balance.

Metric System (Mass Measurement)

Measures mass by comparing objects to a particular standard mass.

Primary Standard

The name given to a small cylinder of metal on which the kilogram ($\text{kg}$) is based; equivalent to $1\,\text{kg}$.

Kilogram (kg)

The primary measurement of mass equal to $1000\,\text{g}$, serving as the primary standard for mass.

Primary Standard Kilogram Copies

Exact duplicates of the primary standard kilogram kept in various countries, including Canada.

Grams (g)

The unit in which small masses are usually expressed.