Chemical Reactions Final Unit Assessment

Front

What is a chemical reaction?

Back

A process where substances (reactants) transform into new substances (products) with different properties.

Front

What is rust?

Back

Rust is a reddish-brown substance formed when iron reacts with oxygen and moisture in the air.

Front

What is a molecule?

Back

A structure formed by two or more atoms bonded together.

Front

What happens to atoms during a chemical reaction?

Back

Atoms rearrange to form new substances, but they are not created or destroyed.

Front

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

Back

A chemical reaction produces new substances, while a physical change alters the form of a substance without changing its chemical identity.

Front

What is an example of a chemical reaction?

Back

Burning wood, which produces ash, smoke, and gases.

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 are reactants?

Back

Substances that undergo a chemical change in a reaction.

Front

What are products?

Back

Substances that are formed as a result of a chemical reaction.

Front

What is an example of a physical change?

Back

Melting ice, which changes from solid to liquid but remains water.