Chemical reactions and catalysts. A chemical reaction involves a chemical change, which happens when two or more particles (which can be molecules, atoms or ions) interact. For example, when iron and oxygen react, they change to a new substance, iron oxide (rust).
It's important for parents to start weaning babies from bottles around the end of the first year and start getting them comfortable drinking from cups. The longer parents wait to start the transition, the more attached kids become to their bottles and the more difficult it can be to break the bottle habit.
Start weaning baby by skipping a bottle feeding every five to seven days. Put whatever liquid your child is used to in his sippy cup â whether itâs breast milk or baby formula. Put a little more liquid in babyâs cup and a little less in his bottle each time.