Science test

Front

What is a molecule?

Back

A molecule is made up of 2 or more atoms.

Tags

NGSS.MS-PS1-1

Front

What is the independent variable in an experiment?

Back

The independent variable is the variable that the experimenter manipulates or changes.

Front

What is the dependent variable in an experiment?

Back

The dependent variable is the variable that is measured or observed in an experiment.

Front

What is a reactant?

Back

A reactant is a substance that takes part in and undergoes change during a chemical reaction.

Tags

NGSS.MS-PS1-2

Front

What is a compound?

Back

A compound is a substance made up of 2 or more different atoms.

Tags

NGSS.MS-PS1-1

Front

What is a yield sign in a chemical equation?

Back

A yield sign is a symbol (→) that indicates the direction of the reaction, placed between reactants and products.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms.

Front

What is a chemical reaction?

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Tags

NGSS.MS-PS1-5

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Tags

NGSS.MS-PS1-1