Light? Dark?
You can use lemon juice instead of vinegar and baking powder or washing powder instead of baking soda. Link to: explosive mixture, fire extinguisher.
Read moreExperiments
Scenarios of experiments are available under the Creative Commons Attribution 3.0 Poland licence (CC BY 3.0 PL). Some rights are reserved to the Copernicus Science Centre. The works were created as a part of the Young Explorer’s Club Programme, conducted by the Copernicus Science Centre with the use of means of the Polish-American Freedom Foundation. It is permitted to use the content freely – provided that this information will be preserved, including the information about the applied licence, held rights and Young Explorer’s Club. Contents of the licence are available at http://creativecommons.org/licenses/by/3.0/pl/.
Fire extinguisher
Use lemon juice or vinegar instead of citric acid. Use baking powder or washing powder instead of baking soda.
Read moreChemical yo-yo
Instead of the cabbage juice use: beetroot soup (ready-made soup from a shop will be OK), hibiscus tea or blueberry juice. Add a drop of vinegar and a drop of cabbage juice to oil.
Read moreHot water, hot milk
Try to carry out the experiment with other liquids of various fat content (note: don’t use in this experiment oil or alcohol). Add to water different substances and repeat the experiment with them.
Read morePhotosynthesis – is a green leaf only green?
Use leaves from different tree species in the experiment – e.g. birch, beech, oak, maple, pine and spruce. Test whether they differ in content of particular pigments.
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