Physical and chemical changes

Front

What is a chemical change?

Back

A chemical change is a process that involves the transformation of one or more substances into new substances, which are not reversible under normal conditions.

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

Is a chemical change reversible?

Back

No, a chemical change is typically irreversible.

Front

Is a physical change reversible?

Back

Yes, many physical changes are reversible, such as melting and freezing.

Front

What happens to the molecules during a physical change?

Back

During a physical change, the arrangement of molecules may change, but their chemical structure remains the same.

Front

What happens to the molecules during a chemical change?

Back

During a chemical change, the bonds between atoms are broken and new bonds are formed, resulting in the creation of new substances.

Front

What is an example of a physical change?

Back

Melting ice, boiling water, and dissolving sugar in water are examples of physical changes.

Front

What is an example of a chemical change?

Back

Burning wood, rusting iron, and baking a cake are examples of chemical changes.

Front

What phase of matter has tightly packed molecules?

Back

Solid.

Front

What phase of matter has loosely packed molecules and can flow?

Back

Liquid.