Ms. Rakhi, a science teacher listed some keywords on the blackboard as:
She asked students to match the keywords with the common changes which are listed as :
P: When we put a lid on a vessel containing hot milk, the inside of the lid gets wet.
Q: When we breathe onto a cold mirror it turns foggy.
R: When we spread hard butter on a warm toast, it becomes soft.
S: Solid piece of an air freshener kept on the bathroom shelf disappears in a few days.
T: When we put ice cubes in water, they disappear after some time.
U: Milk left in the freezer becomes ice cream.