Describing Chemical Reactions

Front

What does the ARROW mean in a chemical reaction?

Back

The arrow in a chemical reaction means 'yields', indicating the direction of the reaction from reactants to products.

Front

Is burning a campfire a chemical or physical change?

Back

Burning a campfire is a chemical change because it involves a transformation of substances.

Front

What evidence shows a chemical reaction took place in Elephant toothpaste?

Back

The formation of a gas (oxygen) is evidence of a chemical reaction in Elephant toothpaste.

Front

In a chemical equation, what are the PRODUCTS?

Back

The products are the substances formed as a result of a chemical reaction.

Front

In a chemical equation, what are the REACTANTS?

Back

The reactants are the starting substances that undergo a chemical change.

Front

What is a chemical reaction?

Back

A chemical reaction is a process where reactants are transformed into products through the breaking and forming of chemical bonds.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

What is an example of a physical change?

Back

An example of a physical change is melting ice, where the substance changes state but not its chemical composition.

Front

What is an example of a chemical change?

Back

An example of a chemical change is rusting iron, where iron reacts with oxygen to form iron oxide.

Front

What is a catalyst?

Back

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