term1 Definition1term2 Definition2term3 Definition3
Please sign in to your Google account to access your documents:
Reversible changes are temporary changes
Reversible changes can be reversed to obtain original substance.
Folding of paper is a physical change while burning of paper is a chemical change
When paper is folded no new substances produced .this it is a physical change ...... When paper is burnt a new substance that is ash is formed
.
Hot air rises on heating .
Air expands on heating . Due to expansion molecules of air spread . This increase the distance among the air particles . This makes the hot air lighter.
The light hot air rises.
Need help typing ? See our FAQ (opens in new window)
Please sign in to create this set. We'll bring you back here when you are done.
Discard Changes Sign in
Please sign in to add to folders.
Sign in
Don't have an account? Sign Up »
You have created 2 folders. Please upgrade to Cram Premium to create hundreds of folders!