Investigating Chemical Reactions: What Are Chemical Reactions

The video explains that chemical reactions are processes where substances change to form new materials with different properties. It highlights everyday examples like frying an egg and fireworks. A detailed example of burning paper is provided, showing how the paper transforms into ash with distinct properties, illustrating the concept of chemical change.

Which of the following activities involves a chemical reaction?

• Reading a book

• Frying an egg

• Listening to music

• Walking in the park

What is a chemical reaction?

• A process where substances remain unchanged

• A process where substances are separated

• A process where substances are mixed but not changed

• A process where substances change to form new materials

What happens to paper when it undergoes a chemical reaction by burning?

• It becomes wet and sticky

• It turns into a liquid

• It transforms into ash with different properties

• It remains unchanged

How does the appearance of paper change after it is burned?

• It turns transparent

• It becomes white and smooth

• It turns black and crumbly

• It becomes shiny and hard

What is the new substance called when paper is burned?

• Charcoal

• Dust

• Ash

• Smoke