Topic 2: Changes in Matter Review Part 1

Front

What is the law of conservation of matter?

Back

The law of conservation of matter states that in any physical change or chemical change, the total mass of matter remains constant; it cannot be created or destroyed.

Front

What happens to a liquid when the stopper is removed from a beaker?

Back

The liquid will not flow out of the beaker if the beaker is upright and the liquid is not being poured.

Front

What does it mean that a liquid has a definite volume but not a definite shape?

Back

It means that a liquid takes the shape of its container but maintains a constant volume regardless of the container's shape.

Front

What is evaporation?

Back

Evaporation is the process by which liquid turns into vapor, usually when heated.

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

Give an example of a physical change.

Back

Examples include ice melting, sugar dissolving in water, or glass breaking.

Front

What is a chemical change?

Back

A chemical change occurs when a substance transforms into a different substance with different properties.

Front

Give an example of a chemical change.

Back

Cooking bacon is an example of a chemical change because it changes the chemical structure of the food.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change does not change the substance's chemical identity, while a chemical change results in the formation of new substances.

Front

What is the process of freezing?

Back

Freezing is the process where a liquid turns into a solid when its temperature is lowered.