The halogens and the metals combine to produce bromides.
Did the Romans really sow the lands of Carthage with salt?
We observe whether a razor blade can float on the surface of different liquids.
Ethylene, produced by the heating of polyethylene, changes the colour of bromine water.
Decomposition of ammonium dichromate by heating.
How do attendants prompt seal pups to do what they are asked to? They are even willing to come to the shore for us! How can we teach them to do that?
Our new educational videos about South Africa are coming soon.
If we pay close attention as we walk through the forests and across the meadows, we can see miracles. Let’s learn more about the rose chafer.
In dice games the probability of certain events can be relatively easily calculated. Let’s examine two basic situations.
You can make a matchstick spinning on two coins without touching it.
Separating mixtures if one of the substances dissolves in water.
Examination of dissolved carbon dioxide in a bottle of carbonated water.
What do the words jama, minaret and muezzin mean? Watch this next video to learn the answers.
This is how you can make a lava lamp at home.
This is a video presenting the characteristics of natural and artificial ecosystems.
A surprising phenomenon occurs when we hold a statically charged ruler near water flowing from a tap.
In this video we are experimenting with food colourings.
Kraków is the second largest and one of the oldest cities in Poland.
When heated, powdered sulphur reacts with powdered zinc, releasing heat.
Catalysed by a few drops of water, aluminium reacts with iodine.