Chemistry Pretest

Front

What is the process called when a solid changes to a liquid?

Back

Melting

Front

What does the law of conservation of matter state?

Back

The mass of the reactants is the same as the mass of the products.

Front

What is the term for the number that represents the quantity of atoms in a chemical formula?

Back

Subscript

Front

What type of properties can only be observed when a substance undergoes a chemical change?

Back

Chemical properties

Front

What is one piece of evidence that indicates a chemical change has occurred?

Back

Bubbles forming.

Front

What is the term for a change in which a substance transforms into a different substance?

Back

Chemical change.

Front

What is the difference between physical and chemical properties?

Back

Physical properties can be observed without changing the substance, while chemical properties can only be observed during a chemical change.

Front

What is an example of a physical change?

Back

Melting ice.

Front

What is the definition of a reactant in a chemical reaction?

Back

A substance that is present at the start of a chemical reaction and is consumed during the reaction.

Front

What is the definition of a product in a chemical reaction?

Back

A substance that is formed as a result of a chemical reaction.