Unit 1 Review

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include cutting, bending, or dissolving.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Examples include burning, rusting, and digestion.

Front

What is an independent variable in an experiment?

Back

An independent variable is the variable that is changed or controlled in a scientific experiment to test its effects on the dependent variable.

Front

What is a dependent variable in an experiment?

Back

A dependent variable is the variable that is measured and affected in an experiment. It responds to changes in the independent variable.

Front

What does MSDS stand for?

Back

MSDS stands for Material Safety Data Sheet, which provides information about the properties of a particular substance.

Front

What are the components of the hazard diamond system?

Back

The hazard diamond system includes four components: Health, Flammability, Reactivity, and Special hazards.

Front

What is the purpose of a graduated cylinder?

Back

A graduated cylinder is used to measure the volume of a liquid accurately.

Front

What is an Erlenmeyer flask used for?

Back

An Erlenmeyer flask is used for mixing, heating, and storing liquids, and it has a narrow neck to prevent spillage.

Front

What is flammability?

Back

Flammability is the ability of a substance to catch fire and burn in the presence of an ignition source.

Front

What is reactivity in chemistry?

Back

Reactivity refers to how readily a substance undergoes a chemical reaction with other substances.