05. Matter Changes and Properties

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together.

Front

What is a chemical change?

Back

A chemical change is a process that involves one or more substances changing into new substances, often 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 is an element?

Back

An element is a pure substance that consists of only one type of atom.

Front

What happens to energy in an exothermic reaction?

Back

In an exothermic reaction, energy is released into the surroundings.

Front

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

Back

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

Front

What is an example of a physical change?

Back

An example of a physical change is melting ice into water.

Front

What is an example of a chemical change?

Back

An example of a chemical change is rust forming on iron.

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.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded and can be separated by physical means.