Chapter 4 Test Final

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances with different properties.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What are subatomic particles?

Back

Subatomic particles are the smaller parts that make up an atom, including protons, neutrons, and electrons.

Front

What are reactants in a chemical equation?

Back

Reactants are the substances that undergo a chemical change and are found on the left side of a chemical equation.

Front

What is formed when hydrogen combines with oxygen?

Back

Water (H2O) is formed when hydrogen combines with oxygen.

Front

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

Back

A physical change alters the form or appearance of a substance without changing its identity, while a chemical change results in the formation of new substances.

Front

What is an example of a physical change?

Back

Grinding is an example of a physical change, as it alters the size and shape of a substance without changing its chemical composition.

Front

What is an example of a chemical change?

Back

Burning wood is an example of a chemical change, as it transforms the wood into ash, smoke, and gases.

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; it is conserved.

Front

What are products in a chemical equation?

Back

Products are the substances that are formed as a result of a chemical reaction and are found on the right side of a chemical equation.