Characteristics of Chemical Reactions Assessment

Front

What is a chemical reaction?

Back

A process where substances (reactants) undergo a transformation to form new substances (products) with different properties.

Front

What are the signs of a chemical reaction?

Back

Common signs include gas production, color change, temperature change, 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.

Front

What happens at the atomic level during a chemical reaction?

Back

Atoms rearrange to form new molecules, breaking and forming chemical bonds.

Front

What is an example of a chemical change?

Back

Rust forming on iron when it reacts with oxygen in the air.

Front

What is an example of a physical change?

Back

Melting ice into water, as it can be reversed without changing the substance.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; the total mass of reactants equals the total mass of products.

Front

What is a reactant?

Back

A substance that undergoes a chemical change in a reaction.

Front

What is a product?

Back

A new substance formed as a result of a chemical reaction.

Front

What is a catalyst?

Back

A substance that speeds up a chemical reaction without being consumed in the process.