Physical and Chemical Changes, States of Matter

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. Examples include melting, freezing, and dissolving.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. It involves making or breaking bonds between atoms. Examples include burning, rusting, and cooking.

Front

What happens to ice when it melts?

Back

When ice melts, it undergoes a physical change from a solid state to a liquid state, resulting in water.

Front

What is the process of a solid turning into a liquid called?

Back

The process of a solid turning into a liquid is called melting.

Front

What is the process of a liquid turning into a solid called?

Back

The process of a liquid turning into a solid is called freezing.

Front

What is an example of a chemical change?

Back

An example of a chemical change is when wood burns and turns into ash and smoke.

Front

What is the difference between a mixture and a compound?

Back

A mixture is a combination of two or more substances that can be separated, while a compound is a substance formed when two or more elements chemically bond together.

Front

What happens to chocolate when it melts?

Back

When chocolate melts, it undergoes a physical change from solid to liquid, but its chemical composition remains the same.

Front

What is an example of a physical change in cooking?

Back

An example of a physical change in cooking is boiling water, where the water changes from liquid to gas (steam) but remains H2O.

Front

What is the state of matter that has a definite shape and volume?

Back

The state of matter that has a definite shape and volume is a solid.