Podcast
Play an AI-generated podcast conversation about this lesson
Questions and Answers
Which of the following is true about chemical changes?
Which of the following is true about chemical changes?
- Chemical changes make new substances (correct)
- Chemical changes do not involve a change in color or temperature
- Chemical changes can easily be undone
- Chemical changes do not produce explosions
What are some signs that a chemical change has occurred?
What are some signs that a chemical change has occurred?
- No materials being combined
- No change in color or temperature
- No new substance being formed
- Bubbles being formed (correct)
How can scientists determine if a chemical change has occurred?
How can scientists determine if a chemical change has occurred?
- By asking if a substance was present before (correct)
- By noticing a change in color or temperature
- By observing the formation of bubbles
- By combining two or more materials
What happens during a physical change?
What happens during a physical change?
Signup and view all the answers
Can most chemical changes be easily undone?
Can most chemical changes be easily undone?
Signup and view all the answers
What is a chemical change?
What is a chemical change?
Signup and view all the answers
Give an example of a chemical change.
Give an example of a chemical change.
Signup and view all the answers
How can you determine if a chemical change has occurred?
How can you determine if a chemical change has occurred?
Signup and view all the answers
What is a physical change?
What is a physical change?
Signup and view all the answers
Give an example of a physical change.
Give an example of a physical change.
Signup and view all the answers
