Physical or Chemical Changes

What is an example of a physical change?

• Burning wood

• Melting ice

• Rusting iron

• Cooking an egg

What happens to the particles in a solid when it is heated?

• The particles in a solid lose energy and move closer together.

• The particles in a solid gain energy and vibrate more, which can lead to a phase change to a liquid.

• The particles in a solid remain stationary and do not change.

• The particles in a solid expand and become gas immediately.

What is a physical change?

• A change that alters the chemical composition of a substance.

• A change that affects one or more physical properties of a substance without altering its chemical composition.

• A change that occurs only at high temperatures.

• A change that involves the formation of new substances.

What is the term for a change that occurs when a substance changes from one state of matter to another?

• Phase change

• Chemical reaction

• Physical alteration

• Molecular transformation

What is an example of a gas?

• Oxygen

• Water

• Iron

• Sand

What state of matter has no definite shape or volume?

• Solid

• Liquid

• Gas

• Plasma

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

• Evaporation

• Condensation

• Sublimation

• Precipitation

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

• Condensation

• Vaporization

• Evaporation

• Precipitation

What is a chemical change?

• A change that results in the formation of new chemical substances, involving a rearrangement of atoms.

• A physical change that does not alter the chemical composition of a substance.

• A process that only involves the mixing of different substances without any reaction.

• A change that occurs when a substance is heated or cooled.

What is an example of a liquid?

• Water

• Sand

• Rock

• Air