Dr. Jarrett's video explores the differences between physical and chemical changes. Physical changes are temporary and do not create new substances, while chemical changes are permanent and result in new substances. Examples include ice melting, paper tearing, and chocolate breaking as physical changes, and paper burning, chocolate cooking, and rust forming as chemical changes. The video also includes a game to identify these changes.

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

• Physical changes involve new substances, chemical changes do not.

• Physical changes are permanent, chemical changes are temporary.

• Physical changes are temporary, chemical changes are permanent.

• Physical changes always involve a change in mass.

When ice melts into water, what type of change is occurring?

• Both chemical and physical change

• Physical change

• Chemical change

• Neither chemical nor physical change

Tearing a piece of paper is an example of which type of change?

• Chemical change

• Physical change

• Neither chemical nor physical change

• Both chemical and physical change

What happens to chocolate when it is melted and then solidifies again?

• It becomes a new substance.

• It loses its original properties.

• It undergoes a physical change.

• It undergoes a chemical change.

What type of change occurs when bread is toasted?

• Physical change

• Neither chemical nor physical change

• Chemical change

• Both chemical and physical change

Boiling an egg results in what type of change?

• Physical change

• Neither chemical nor physical change

• Chemical change

• Both chemical and physical change

What is rust an example of?

• Neither chemical nor physical change

• Both chemical and physical change

• Chemical change

• Physical change

Which of the following is a chemical change?

• Breaking glass

• Baking a cake

• Slicing bread

• Mowing the lawn

What type of change is lighting a match?

• Physical change

• Chemical change

• Both chemical and physical change

• Neither chemical nor physical change

Squeezing lemons to make lemonade is an example of what type of change?

• Physical change

• Neither chemical nor physical change

• Chemical change

• Both chemical and physical change