Conservation of Matter Practice

Front

What type of reaction occurs when toothpaste breaks down acids in your mouth?

Back

Exothermic reaction

Front

Is copper tarnishing a physical or chemical change?

Back

Chemical change

Front

In an exothermic reaction, what happens to heat?

Back

Heat is given out.

Front

What is the smallest particle of an element that maintains the chemical identity of that element?

Back

Atom

Front

What is a chemical reaction?

Back

The process by which one or more substances change to produce one or more different substances.

Front

What is the definition of conservation of matter?

Back

Matter cannot be created or destroyed in a chemical reaction.

Front

What is an endothermic reaction?

Back

A reaction that absorbs heat from its surroundings.

Front

What is an example of a physical change?

Back

Melting ice.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

Front

What is the law of conservation of mass?

Back

In a closed system, the mass of the reactants equals the mass of the products.