Bischof Chemical and Physical Changes

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include melting, freezing, and tearing.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. It involves a chemical reaction and the rearrangement of atoms. Examples include burning, rusting, and baking.

Front

What happens to ice when it melts?

Back

When ice melts, it undergoes a physical change from solid to liquid without changing its chemical composition.

Front

What is the Law of Conservation of Mass?

Back

The Law of Conservation of Mass states that matter cannot be created or destroyed in a chemical reaction. The total mass of the reactants equals the total mass of the products.

Front

What happens to wood when it is burned?

Back

When wood burns, it combines with oxygen and transforms into ashes, carbon dioxide, and water vapor, demonstrating a chemical change.

Front

How does tearing paper affect its weight?

Back

Tearing paper does not change its weight; it remains the same before and after tearing.

Front

What is an example of a chemical change?

Back

An example of a chemical change is the reaction between baking soda and vinegar, which produces carbon dioxide gas.

Front

What is an example of a physical change?

Back

An example of a physical change is melting ice, where the ice changes from solid to liquid but remains water.

Front

Does the weight of matter change during a chemical change?

Back

No, the weight of matter stays the same during a chemical change, according to the Law of Conservation of Mass.

Front

What is produced when baking soda and vinegar react?

Back

When baking soda and vinegar react, they produce carbon dioxide gas, water, and sodium acetate.