Matching Pairs The weatherOnline version Let's learn about weather. by Daniel Educaplay 1 2 When there is a lot of humidity... 3 Humidity is the amount of ........................... in the air. 4 5 Temperature is measured in... 6 The instrument we use to measure temperature is... 7 When the weather is cold... 8 When the weather is hot... Clouds Fog Water vapour ... temperature is high. ... degrees. ... fog and clouds can form. ... the temperature is low. ... a thermometer.