The US Census Form, Which Is Mailed Out to Every

question 25

Multiple Choice

The US census form, which is mailed out to every household every 10 years, is an example of

• A)an experiment.
• B)an observation.
• C)a self-administered questionnaire.
• D)secondary research.

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Definitions:

Mass

A measure of the amount of matter contained in an object, commonly measured in kilograms or grams.

Liquid Sample

A portion of matter in the liquid state used for analysis or testing.

Mass

An assessment of the quantity of substance contained within an object, usually expressed in kilograms or grams.

Chemical

A substance produced by or used in a chemical process, including elements and compounds.