Front

What is density?

Back

Density is the mass of an object divided by its volume, often expressed in grams per cubic centimeter (g/cm³).

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 a chemical change?

Back

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

Front

Define homogeneous mixture.

Back

A homogeneous mixture is a mixture in which the composition is uniform throughout, and the individual components are not distinguishable.

Front

Define heterogeneous mixture.

Back

A heterogeneous mixture is a mixture in which the composition is not uniform, and the individual components can be seen and separated.

Front

What is an example of a physical change?

Back

Melting ice is an example of a physical change, as it changes from solid to liquid without altering its chemical structure.

Front

What is an example of a chemical change?

Back

Burning wood is an example of a chemical change, as it transforms into ash and gases, creating new substances.

Front

What is the difference between a compound and a mixture?

Back

A compound is a substance formed when two or more elements chemically bond together, while a mixture is a combination of two or more substances that retain their individual properties.

Front

What is the significance of particle size in mixtures?

Back

The size of particles in a mixture determines whether it is homogeneous or heterogeneous; smaller, similar-sized particles create homogeneous mixtures.

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.