What is Heating?
When you raise the temperature of something
Tearing pieces of paper. R or Non-R change?
Reversible
Breaking of Glass. R or Non-R?
Reversible
Making an Omellette.
Non - Reversible
What is Cooling?
Bringing down the temperature of something
Baking a cake
Non- Reversible
How can you tell if a change is Reversible or not?
If the object that changed can go back to its original form, then it is reversible.
When you heat a stick of butter, what state of matter does it change to?
It changes from Solid to Liquid
What are examples of reversible changes?
Melting butter then cooling it and melting an ice cube then re-freezing it in the freezer are both common examples.
Give examples of Non - Reversible Changes
Popcorn popping, cooking eggs, making cupcakes, and lighting something on fire are all common examples
