Chemical and Physical Changes © Copyright 2015 – All rights reserved. www.cpalms.org

Chemical Change What is a chemical change? Any change that results in the formation of a new chemical substance © Copyright 2015 – All rights reserved. www.cpalms.org

Chemical Change What are the signs of a chemical change? Color change Formation of a precipitate Formation of a gas Odor change Temperature change © Copyright 2015 – All rights reserved. www.cpalms.org

Chemical Change - Examples Rust formation on a nail Souring of milk Sean McMenemy, Flickr (CC BY 2.0) Kagor, Wikimedia Commons (CC BY-SA 3.0) © Copyright 2015 – All rights reserved. www.cpalms.org

No new substance is formed. Physical Change What is a physical change? Any change not involving a change in the substance’s chemical identity No new substance is formed. © Copyright 2015 – All rights reserved. www.cpalms.org

Physical Change - Examples Cutting paper Making orange juice Pixabay (CC0) Scott Bauer, USDA (CC0) © Copyright 2015 – All rights reserved. www.cpalms.org

Your Turn to Decide! Read the Task Cards at each station and perform the task. Decide whether each task represented a chemical or a physical change. Record your results in the provided data table. Clean up each station once you are finished. © Copyright 2015 – All rights reserved. www.cpalms.org