Clouds form when moist air rises and condenses. Clouds are classified by height, shape, and whether they bring precipitation. Rainfall is measured using a rain gauge placed in an open area, partially buried in the ground and 30cm above the ground to prevent inaccurate readings. Rainfall amounts are usually measured in millimeters.

1. Rainfall

5. Cloud types Clouds are named according to their height, shape and whether they bring precipitation. nimbus stratus Heaped fluffy cloud Brings rain Mid-level cloud Layered cloud Cumulo Alto

6. Rainfall Rainfall is measured using a rain gauge . Rain is a type of precipitation . Precipitation occurs when water vapour in the air cools and condenses into water droplets. Snow, sleet, hail, dew and fog are also types of precipitation. Rainfall is usually measured in millimetres (mm). How is rainfall measured?

8. Can you recall how to draw and label the different parts of the rain gauge?

14. High tech weather instruments