Task 7

Materials and tools for a working group:

• drawing paper A4 and A3, string, adhesive tape (glue)

The teacher will provide the pupils with instructions for creating a paper cone from the A4 drawing paper so that it has a narrow mouth on one side and wide on the other. They also create a cone (megaphone) from a larger drawing (A3). The teacher guides the pupils to make predictionsabout whether or not they will be able to use the cone to learn how to use them (the various options are listed in the tables in task 5, where pupils create predictions or indicate the possibility for which they think they can help them hear the sound from the box from a distance). Then the pupil‘s teacher leads them to find out how it really is. It will warn them of the distance from which the observation must be made – a mark created on a spaghetti which indicates the place from which we can no longer hear the sound in the box. In the verification, quiet in the room is very important. Gradually, with the help of a teacher, the student verifies which of the two megaphones and how it is used to ensure that we hear the sound from the box from a greater distance than without the cone, and at the same time when we hear the sound from the box from a distance.