Chemical and Physical Changes in Matter

Front

What is a physical change?

Back

A physical change is a change in which the form or appearance of a substance changes, but its chemical composition remains the same. Examples include melting ice or breaking glass.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Examples include burning wood or rusting iron.

Front

What happens during an earthquake?

Back

An earthquake is a sudden movement in the earth's surface along a plate line, caused by the release of energy in the Earth's crust.

Front

What is an example of a substance being formed?

Back

An example of a substance being formed is wood burning, which creates ash and gases.

Front

What is an insulator?

Back

An insulator is a material that does not allow electricity to flow through it easily. Examples include rubber and glass.

Front

What happens when a good insulator is tested in a circuit?

Back

When a good insulator is tested in a circuit, no current flows through the circuit.

Front

What are amphibians?

Back

Amphibians are animals that spend part of their life on land and part in water. Examples include frogs and salamanders.

Front

What is an example of a physical change?

Back

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

Front

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

Back

A physical change alters the form of a substance without changing its chemical composition, while a chemical change results in the formation of new substances.

Front

What is the role of energy in chemical changes?

Back

Energy is often required to break bonds in reactants during a chemical change, and energy is released when new bonds form in products.