Physical and Chemical Changes

Front

What is the definition of 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 the definition of a chemical change?

Back

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

Front

What happens to water vapor when it condenses on a cold surface?

Back

Water vapor cools down and loses energy, causing it to change from a gas to a liquid, forming droplets.

Front

Is melting ice a physical or chemical change?

Back

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

Front

What is matter?

Back

Matter is anything that has mass and takes up space.

Front

What is an example of a chemical change?

Back

An example of a chemical change is burning wood, which produces ash and gases.

Front

What is an example of a physical change?

Back

An example of a physical change is dissolving sugar in water, where the sugar can be recovered.

Front

How can you identify a chemical change?

Back

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

Front

What is condensation in terms of physical and chemical changes?

Back

Condensation is a physical change where water vapor turns into liquid water.

Front

What is the role of temperature in physical and chemical changes?

Back

Temperature can influence the rate of physical and chemical changes, often determining whether a change occurs.