Unit 4 Grade Replacement: Properties of Matter

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. Examples include melting, freezing, and dissolving.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Examples include rusting, burning, and digestion.

Front

What is a physical property?

Back

A physical property is a characteristic of a substance that can be observed or measured without changing the substance's chemical identity. Examples include color, density, and melting point.

Front

What is a chemical property?

Back

A chemical property is a characteristic of a substance that becomes evident during a chemical reaction. Examples include reactivity with acids, flammability, and oxidation states.

Front

What is density?

Back

Density is a measure of how much mass is contained in a given volume. It is calculated using the formula: density = mass / volume.

Front

How do you determine if an object will sink or float in water?

Back

An object will sink in water if its density is greater than that of water (1 g/mL) and will float if its density is less than that of water.

Front

What is the formula for calculating density?

Back

The formula for density is: density = mass / volume.

Front

What is matter?

Back

Matter is anything that has mass and takes up space.

Front

What happens to the physical properties of a substance during a physical change?

Back

The physical properties of a substance may change during a physical change, but its chemical composition remains the same.

Front

What is an example of a physical change?

Back

An example of a physical change is ice melting into water.