Chocolate powder was added to a cup of hot water and another cup with coldwater.

Teacher placed a teaspoon of sugar in a glass with tap water and a glass withhot water.

Two babies were given milk by their mothers. One mother used hot water while the other used tap water to dissolve the powdered infant milk.

Two salt mixtures were prepared for laboratory use. One mixture used rock salt while the other mixture used iodized salt.

A one tablespoon of creamer was added to two cups of hot coffee. One coffee mixture was stirred after putting creamer while the other cup was left untouched.