Embed Size (px)
Citation preview
Learning objectives
• that heating some materials can cause them to change
• that cooling some materials can cause them to change
Heating something is causing its
temperature to rise. It is not setting it
alight.
Remember……
Look at each picture.
Predict what will happen to the material when it is
heated.
Decide whether these changes
are reversible or irreversible.
This is a reversible
change
This is an irreversible change
This is an irreversible
change
This is an irreversible change
This is a reversible change
This is an irreversible change
This is a reversible change
Now suggest materials that are
changed by cooling and decide whether these changes are
reversible or irreversible.
![materials - pdfs.semanticscholar.org...materials [13], adhesive types [14], adhesive drying time, and surface treatments [15]. Among them, custom tray materials and surface treatments](https://img.dokumen.tips/doc/110x75/5fef0862275ddb4e183e64d8/materials-pdfs-materials-13-adhesive-types-14-adhesive-drying-time.jpg)
