Evidence of Chemical Reactions (TCI Lesson 12)

Front

What is a chemical reaction?

Back

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

Front

What evidence indicates a chemical reaction has occurred?

Back

Signs include color change, gas production, temperature change, and formation of a precipitate.

Front

What are reactants in a chemical equation?

Back

The substances that undergo a chemical change, found on the left side of the equation.

Front

What are products in a chemical equation?

Back

The new substances formed as a result of a chemical reaction, found on the right side of the equation.

Front

Is burning a substance a chemical reaction?

Back

Yes, burning is a chemical reaction that produces new substances.

Front

What is rusting?

Back

A chemical reaction where iron reacts with oxygen and moisture to form iron oxide (rust).

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances.

Front

What is a precipitate?

Back

A solid that forms and settles out of a liquid mixture during a chemical reaction.

Front

What is an example of a chemical change?

Back

Burning paper, which produces ash and smoke.