Bell Ringer Is it possible for an object or substance to have both a physical and a chemical property? Explain.

Changes in Matter (Page 77) Essential Question How can you tell that a physical or chemical change in matter has taken place? https://www.youtube.com/watch?v=JOHdZsQXw7I

1 - Physical Changes of Matter *A change that affects one or more physical properties of matter **Doesn’t change what it is

**Its all water, just in different physical states/phases/forms

2 - Chemical Changes of Matter *A change that occurs when matter reacts with other matter and changes into different matter

Evidence of a chemical change *Change in odor *Change in color (sometimes) *Change in temperature *A precipitate forms (solid) *Light or heat given off *Formation of gases (bubbles, smoke) *Impossible or hard to reverse https://www.youtube.com/watch?v=FOeH29hlHlU

Topic: Changes of Matter Essential Question How can you tell that a physical or chemical change in matter has taken place?

Law of Conservation of Mass *When matter changes (physical or chemical), mass is not created or destroyed.

Law of Conservation of Mass Physical Change

Law of Conservation of Mass *In chemical changes, the mass of the old substances equals the mass of the new substances. https://www.youtube.com/watch?v=3lHHOiTdmK4

Review *What is a physical change? Examples *What is a chemical change? Examples *How can we tell a chemical change has taken place? Examples *What is the law of conservation of mass? Examples

Conclusion Quick Write 1 - How can you tell that a physical change has taken place? 2 – How can you tell a chemical change has taken place?