PS.5.1.2 (5.P.2.3) #1: Schoolnet

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 an example of a chemical change?

Back

Burning wood is an example of a chemical change because it transforms the wood into ash and smoke.

Front

What happens during rusting?

Back

Rusting is a chemical change that occurs when iron reacts with oxygen and water, forming iron oxide.

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 example of a physical change?

Back

Melting ice is an example of a physical change because it changes from solid to liquid but remains water.

Front

What are signs of a chemical change?

Back

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

Front

What is combustion?

Back

Combustion is a chemical reaction that occurs when a substance reacts rapidly with oxygen, producing heat and light.

Front

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

Back

A chemical change results in the formation of new substances, while a physical change does not change the substance's chemical identity.

Front

What is an effervescent tablet?

Back

An effervescent tablet is a type of medication that releases gas when dissolved in water, indicating a chemical change.

Front

What is an example of a chemical change in cooking?

Back

Frying an egg is a chemical change because the heat causes the proteins in the egg to change structure and form new substances.