Front

What is the periodic table of elements?

Back

A chart that organizes all known elements according to their properties.

Front

What is an electron?

Back

A subatomic particle with a negative electric charge located in the electron cloud of an atom.

Front

What is a controlled variable in an experiment?

Back

A condition in an experiment that does not change.

Front

What is a qualitative observation?

Back

An observation made using your senses.

Front

What is an ion?

Back

An atom with a positive or negative charge.

Front

What is a dependent variable?

Back

The variable that is measured in an experiment.

Front

What is a hypothesis?

Back

A proposed explanation for a scientific question that can be tested.

Front

What is a scientific theory?

Back

A well-substantiated explanation of an aspect of the natural world that is based on a body of evidence.

Front

What is a mixture?

Back

A combination of two or more substances that are not chemically bonded.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances.