Unit 1 C&M Bath Bombs Review

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances, involving a change in chemical properties.

Front

What is an example of a chemical change?

Back

Examples include rusting of iron, burning wood, and baking a cake.

Front

What does the Law of Conservation of Mass state?

Back

In a chemical reaction, matter is not created or destroyed; it is only rearranged into different substances.

Front

How many atoms of helium are present after a chemical reaction if you start with 5 atoms?

Back

You will still have 5 atoms of helium after the reaction.

Front

What gas is produced by a bath bomb when it reacts with water?

Back

Carbon dioxide is produced when a bath bomb reacts with water.

Front

What happens to a nonflammable gas when a flame is placed above it?

Back

The gas rises and may extinguish the flame if it is less dense than air.

Front

Define density in the context of gases.

Back

Density is the mass of a substance per unit volume, which determines whether a gas will rise or sink in air.

Front

What is the significance of carbon dioxide in chemical reactions?

Back

Carbon dioxide is often a product of combustion and fermentation, and it can indicate a chemical change has occurred.

Front

How can you identify a chemical change?

Back

Indicators of a chemical change include color change, temperature change, gas production, and the formation of a precipitate.

Front

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

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.