Science Review- Matter

Front

What is a solution?

Back

A solution is a homogeneous mixture where one substance (the solute) is dissolved in another (the solvent). For example, saltwater is a solution of salt (solute) in water (solvent).

Front

What is evidence of a physical change?

Back

Evidence of a physical change includes changes in shape, size, or state of matter without forming a new substance. For example, ice melting into water is a physical change.

Front

What are the characteristics of a solid?

Back

A solid has a definite shape and definite volume, meaning it maintains its shape and size regardless of the container it is in.

Front

What does the Law of Conservation of Mass state?

Back

The Law of Conservation of Mass states that matter cannot be created or destroyed in a chemical reaction; it can only change forms.

Front

What type of change occurs when fireworks explode?

Back

Fireworks exploding are an example of a chemical change, as new substances are formed during the reaction.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances where each retains its own properties. For example, a salad is a mixture of different vegetables.

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 occurs when a substance transforms into a different substance with different properties, such as rust forming on iron.

Front

What is the difference between a solid and a liquid?

Back

A solid has a definite shape and volume, while a liquid has a definite volume but takes the shape of its container.

Front

What happens to the particles in a solid when it melts?

Back

When a solid melts, its particles gain energy and move apart, transitioning into a liquid state.