Chemical and Physical Changes in Matter

The video tutorial explains the differences between physical and chemical changes in matter. Physical changes alter the appearance but not the composition, such as ice melting. Chemical changes result in new substances, like copper reacting with oxygen. The video also covers methods for separating mixtures, including distillation and filtration, based on physical properties.

What happens to the composition of matter during a physical change?

• It changes completely.

• It remains the same.

• It disappears.

• It becomes a new substance.

Which of the following is an example of a chemical change?

• Water boiling

• Ice melting into water

• Copper forming a patina

• Wood being cut in half

In a chemical reaction, what are the substances called that are present before the change?

• Products

• Reactants

• Elements

• Catalysts

What is the result of a chemical change?

• A new substance is formed.

• The substance remains unchanged.

• The substance evaporates.

• The substance melts.

What type of change occurs when butane evaporates from a lighter?

• Biological change

• Nuclear change

• Physical change

• Chemical change

What happens to butane molecules when they are ignited?

• They freeze.

• They remain unchanged.

• They form a new substance.

• They disappear.

Which method is used to separate a mixture based on boiling points?

• Evaporation

• Distillation

• Condensation

• Filtration

What is the purpose of a condenser in the distillation process?

• To cool and condense the vapor

• To heat the mixture

• To separate solids from liquids

• To mix the substances

How does filtration separate mixtures?

• By boiling the mixture

• By using a magnet

• By separating based on physical state

• By chemical reaction

What is a common kitchen example of filtration?

• Making spaghetti

• Boiling water

• Frying eggs

• Baking bread