Chemical Reactions

Front

What is the state of matter with the greatest density?

Back

Solid

Front

What is a substance in science?

Back

A substance is a form of matter that has a specific composition and properties.

Front

What are the reactants in a chemical reaction?

Back

The substances that undergo a chemical change; for example, baking soda and vinegar in a reaction.

Front

What does the Law of Conservation of Matter state?

Back

Matter cannot be created or destroyed in a chemical reaction; it can only change forms.

Front

Define a reactant in a chemical reaction.

Back

The substances we start with; what reacts in the chemical process.

Front

What is the difference between a reactant and a product?

Back

Reactants are the starting materials in a chemical reaction, while products are the substances formed as a result of the reaction.

Front

What is the role of energy in chemical reactions?

Back

Energy is required to break bonds in reactants and is released when new bonds form in products.

Front

What is a chemical equation?

Back

A symbolic representation of a chemical reaction showing the reactants and products.

Front

What does it mean for a reaction to be balanced?

Back

A balanced reaction has the same number of each type of atom on both sides of the equation.

Front

What is an example of a physical change?

Back

Melting ice is a physical change; the substance remains water.