Activity 3: Sound is a wave |
Catagory: Sound |
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Target Group: 3 to 6 year old children in nursery
school |
Aims: The children realize that sound can be make
visible, that sound can move items |
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Where?
the
group’s room |
How
long? Approx. 45 minutes |
What?
Experiments
concerning sound, make a sound cannon |
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Preparation: Material: hand drums, CD player, grains of
rice / pins, a bowl filled with water, a stone, milk, food colour, wine
glasses, cardboard tubes, thin plastic foil, cardboard paper, thin slips of
paper, pencil, rubber, Sellotape Film Schall
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Steps: Situation / Problem: The children throw a stone into a bowl filled with
water / milk / food colour. Waves appear. Tones produce waves in the air. Can
we also see the tone that we hear? Exploring – Developing Phase: Experiment 1: Put a CD player next to a hand drum, put rice
grains or pins on the drum, turn on the CD player, turn the volume up and
down. Experiment 2: Put several glasses filled with different
quantities of water into the middle, the children slide a damp finger over
the edge of the glass, singing sounds are produced Make a sound cannon: - glue a circle made of cardboard which has a little hole in the middle on the opening of a tube - draw a thin plastic foil over the other opening - fold a thin paper slip at a right angle and glue it on a table - hold the tube so that the hole points in the direction of the paper slip - knock on the plastic foil
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Scientific Explanation: Experiment 1: Sound travels through the air, reaches the drum
and makes the surface of the drum swing. Experiment 2: The tones are produced by the finger that rubs
over tiny uneven spots in the glass, that is what makes the glass swing and
produces a sound. Make a sound cannon: The knocking produces the sound waves that travel
through the tube. Sound waves are air vibrations which push against the paper
slip. |
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Attention! |
References: Aerdley, Neil und Burnie, David: Spannende Experimente aus
Natur und Technik. Bindlach
1998 |
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