Properties of Matter Review

Front

What effect do hot temperatures have on the speed of a chemical change?

Back

Hot temperatures can increase the speed of a chemical change.

Front

What is an example of a process that is not a physical change?

Back

A match burning is not a physical change.

Front

True or False: Two different substances with the same volume can have different densities.

Back

True.

Front

What happens to the molecules of a substance as it heats up?

Back

As a substance heats up, its molecules speed up and get farther apart.

Front

What is the difference between observation and inference?

Back

Observation is a statement based on what is seen or measured, while inference is a conclusion drawn from observations.

Front

Define density in terms of mass and volume.

Back

Density is defined as mass per unit volume, typically expressed as grams per cubic centimeter (g/cm³).

Front

What is a physical change? Provide an example.

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. An example is melting ice.

Front

What is a chemical change? Provide an example.

Back

A chemical change is a change that results in the formation of new chemical substances. An example is rust forming on iron.

Front

How does temperature affect the state of matter?

Back

Increasing temperature can cause solids to melt into liquids and liquids to evaporate into gases.

Front

What is the principle of conservation of mass in chemical reactions?

Back

The principle of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.