Clouds are formed when the water vapour in air cools down and forms droplets of water or ice. When lots of these droplets come together they form a cloud.
For a more in depth answer from Weather Wiz Kids.
For a video explanation, please see below.
If you prefer to learn by doing, please see this video of a fun experiment.
Photo credit: Anatoly Tipyashlin via 123rf.com
The science of weather prediction or forecasting is called meteorology. A person who predicts the weather is a meteorologist.
A meteorologist will collect data from a range of sources to show what the current weather conditions are. They then predict what will happen based on what has happened in the past, when the conditions were the same or similar.
Among the type of data collected is air pressure, temperature, wind speed and direction. This data is collected by weather stations which are dotted around the country.
A more in depth answer from Weather Wiz Kids
A video explanation:
You can find quicksand in many different places. Quicksand is sand that has been mixed with so much water it forms a mixture that is in between a liquid and a solid. It does not actually suck you down, it is just so soft that it can’t support your weight, so you sink into it.
Learn how to make your own quicksand with this link
The European Union is a group of 28 countries that have joined together in an economic and political union. The aims of this union are to improve the lives of its 500 million citizens by pooling resources and laws into an internal single market. They share laws and some of the countries even share a currency (19 member states use the EURO). In parts of Europe (the Schengen Area) there is an agreement that people can travel between member states without having to cross formal passport controls.
The current 28 member states are:
For some further reading and some fun games and quizzes click here