Ch 2 Matter Post-Test (2.1 - 2.3)

Front

What is a chemical change?

Back

A chemical change is a process where one or more substances are transformed into different substances with new chemical properties. Example: Rusting of iron.

Front

What is an element?

Back

An element is a pure substance that consists of only one type of atom. Examples include hydrogen (H), oxygen (O), and carbon (C).

Front

What type of matter has less energy and movement than liquids?

Back

Solids have less energy and movement than liquids.

Front

What is a compound?

Back

A compound is a substance formed when two or more different types of atoms bond together. Example: Water (H2O) is a compound made of hydrogen and oxygen.

Front

What are chemical symbols?

Back

Chemical symbols are one or two-letter notations used to represent elements in the periodic table. Example: 'Na' for sodium, 'Cl' for chlorine.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that retain their individual properties. Example: Saltwater is a mixture of salt and water.

Front

What is the difference between a homogeneous mixture and a heterogeneous mixture?

Back

A homogeneous mixture has a uniform composition throughout (e.g., saltwater), while a heterogeneous mixture has a non-uniform composition (e.g., salad).

Front

What is the process of boiling?

Back

Boiling is a physical change where a liquid turns into vapor when it reaches its boiling point.

Front

What is rusting?

Back

Rusting is a chemical change that occurs when iron reacts with oxygen and moisture, forming iron oxide (rust).

Front

What is the state of matter with the highest energy?

Back

Gases have the highest energy and movement compared to solids and liquids.