When
we shared our photos and memories about ICELAND, our students were so much
impressed by its volcanoes, waterfalls and geysers that they call it now
NICELAND J. That is why, when we
came up with our new Comenius activity – the scientific experiment – all of
them wanted to make and see a volcano eruption and its bubbling lava.
Irina’s
class has made a volcano.
Materials: vinegar, baking soda, transparent
plastic cups, deep plates, red or yellow food colouring
Procedure:
1. Mix the vinegar with the food colouring.
2. Put one or two spoonfuls of baking soda
in a transparent plastic cup.
1 3. Pour 100 ml of coloured vinegar onto the
baking soda.
4. Watch how your volcano comes alive!
Cecilia’s class has made the volcano lava.
Materials: 1 liter plastic bottle, ¾ cup of water,
vegetable oil, fizzing tablets (such as Alka Seltzer or effervescent calcium or
vitamin C etc.), red food colouring
Procedure:
1 1.
Pour the water into the bottle.
2.
Slowly
pour the vegetable oil into the bottle until it’s almost full. You may have to
wait a few minutes for the oil and water separate.
3.
Add 10
drops of food coloring to the bottle. The drops will pass through the oil and
then mix with the water below.
4. Break an
effervescent tablet in half and drop the half tablet into the bottle. Watch it
sink to the bottom and let the blobby greatness begin!
To keep
the effect going, just add another tablet piece. For a true lava lamp effect,
shine a flashlight through the bottom of the bottle.
