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Air humidity and precipitation
EduBook Organización
- 7605 visitas
3.1. Air humidity Humidity is the amount of water vapour in the air. The water vapour comes from seas and oceans, rivers, lakes, plants and other living things. The amount of water vapour that the air…
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Initial self-evaluation T4 01 - Rivers and seas
EduBook Organización
- 4830 visitas
Complete the following text that describes the water cycle with the help of the words below: clouds – snow – rivers – evaporates – water vapour – air – grows cold – droplets Water from…
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Ocean dynamics
EduBook Organización
- 3320 visitas
3.1. How oceans and seas move The water in oceans and seas is always moving because of waves, tides and ocean currents. Waves Waves are caused by wind moving the water on the surface of the sea. The…
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Final evaluation 9 - The Hydrosphere
EduBook Organización
- 2986 visitas
Decide which of the following sentences are false and correct them: Some 97,4% of the planet's water is continental. More than 75% of the planet's fresh water is located in glaciers. Homes,…
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The weather (II)
EduBook Organización
- 2743 visitas
Clouds and precipitation Clouds Water vapour forms when the Sun heats the water on land or in the oceans. The warm water vapour rises up in the atmosphere. There it cools and changes from gas into…
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Did you know...
EduBook Organización
- 2156 visitas
Some communities live near large rivers but cannot pipe the water to where they live. Every day, women and children have to walk long distances to bring water home. However, the issue is not only about…
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Learn. Observe thermal equilibrium
EduBook Organización
- 1723 visitas
What do we need? Three glass containers A thermometer A glass rod What do we do? Put hot water in one of the containers (A) and cold water in the other (B). Measure the temperature of the water in both…
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The main changes of state
EduBook Organización
- 1616 visitas
Heat ice and water in a saucepan. Watch and explain what happens. Put a container of water in the freezer. Record the temperature of the water at regular intervals, and note it down. What is the…
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Find out more
EduBook Organización
- 1363 visitas
Boiling and evaporation are different processes. Both change a liquid to a gas, but happen in different ways. Water boils at 100°C. During boiling, the total volume of liquid water is changing to water…
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Interactive English
This web page contains activities for beginners, intermediate and advanced learners. There are grammar exercises and games to practice articles, verb tenses, comparison, clothes, idioms, etc...Higher…