Chemical/Physical Change

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 process that alters the form or appearance of a substance but does not change its chemical composition.

Front

Example of a chemical change: rusting of a bike.

Back

Rusting is a chemical change because it involves the reaction of iron with oxygen to form iron oxide.

Front

Example of a physical change: juicing a lemon.

Back

Juicing a lemon is a physical change because the lemon's juice is extracted without changing its chemical structure.

Front

What happens during the rusting of an iron nail?

Back

During rusting, iron reacts with oxygen and moisture in the air, resulting in a chemical change that produces rust.

Front

What is an example of burning leaves?

Back

Burning leaves is a chemical change because it transforms the leaves into ash and gases through combustion.

Front

What happens when you crush a soda can?

Back

Crushing a soda can is a physical change because it changes the shape and size of the can without altering its material.

Front

What are the signs of a chemical change?

Back

Signs of a chemical change include color change, temperature change, gas production, and the formation of a precipitate.

Front

What are the signs of a physical change?

Back

Signs of a physical change include changes in state (solid, liquid, gas), shape, and size without new substances forming.

Front

Is melting ice a chemical or physical change?

Back

Melting ice is a physical change because it changes from solid to liquid without changing its chemical composition.