weather [3] [information over pictures]

A weather vane is made up of a tail and an arrow. The tail fin catches the wind and the arrow points toward the direction the wind is blowing FROM. If the arrow on the weather vane is pointing west then it means there is a west wind.	A barometer is an instrument that measures the weight of the air pressing down on you. The air pressure reading that they get from the instrument is measured in units called millibars.	An anemometer is an instrument that measures wind speed. The stronger the wind blows, the faster it rotates. It counts the number of rotations, which is used to calculate wind speed.
Weather balloons measure temperature, humidity, and atmospheric pressure as they rise. They also track wind speed and direction. This data is used to predict weather patterns.	Thermometers help to measure the maximum and minimum temperature in a day of a place. The left tube gives us the maximum temperature while the right tube gives us the minimum temperature.	The Met Office has a weather station network across the whole UK, with more than 200 automatic stations like this. The data they collect is fed into a central control centre in Exeter.

Look at all of the pictures in turn. As you hover over each one a blue screen appears with an explanation of what the picture shows. Important words are coloured. If you are certain that you know about the picture click on it and it will disappear. As you go through all of the pictures you will get rid of all those which you know about and be only left with those you may be unsure of. In some cases you may get rid of all of the pictures in which case you are ready to move on to other activities which will test your knowledge on that particular topic.