Topic 1: Intro to Density & The Practice of Science

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Controlled variable

A factor or condition in a scientific experiment that is purposefully kept the same.

Control group

A group that is untreated by the factor being tested, it serves as a reference for comparison to the experimental groups

Experiment

A scientific test or procedure that is carried out under controlled conditions to answer a scientific question.

Hypothesis

A statement that can be tested scientifically through experiments and/or other scientific investigations

Conclusion

A statement that tells what an investigation showed, based on observations and data

Valid

A term used to describe the certainty of data or results of an investigation or experiment

Inference

An explanation based on evidence that is not directly observed.

Empirical evidence

Evidence based on observations or experiments rather than theory.

Observation

Information about the natural world gathered through the senses and/or scientific instruments.

Repetition

Making multiple sets of measurements or observations in a scientific investigation

Data

Measurements or observations collected and recorded in an experiment or investigation

Mass

The amount of matter a substance or object has.

Volume

The amount of space an object or substance occupies.

Density

The relationship between the mass of the substance and how much space it takes up (volume).

Replication

The reproduction of a scientific investigation by another person to ensure accuracy

Test variable (independent variable)

The variable in the experiment that you change on purpose

Outcome variable (dependent variable)

The variable that is influenced by the test variable, it is observed and usually measured

Scientific investigation

the process by which a scientist asks a question about the natural world, collects and analyzes data to help answer that question, and communicates the results to the scientific community

Analyze

to examine methodically by separating into parts and studying their interrelatedness


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