We breathe air. We drink water. We eat food. Doctors give us shots. Parents give us medicines.
Students identify healthy things that belong in the body.
However, if we put things in the body that do not belong there, such as chemicals that belong only in machines or drugs that should only be given by parents, doctors or nurses, we could make ourselves sick. Students decide whether substances are healthful or harmful for the body. Show students the index cards with the names of different substances on them. Ask students which heading each substance goes under. Tape the cards in the appropriate columns on the board.