The water cycle Lesson 14 of the world course of Mova's primary school: 17 sentences, each with its syntax tree and pragmatics. The lessons are written for Mova, and their agreed trees are part of Mova corpus 0.4 (CC BY-SA 4.0). How Mova does on its tests: the lesson at school .
0 The water on Earth is used again and again in a never-ending journey called the water cycle. 1 The Sun warms seas, lakes, rivers and soil, and water evaporates into the air as invisible vapour; plants also give off water vapour from their leaves. 2 As the moist air rises it cools, and the vapour condenses on tiny specks of dust, smoke and sea salt into droplets that make clouds. 3 When the droplets join together and grow heavy, they fall as rain, snow or hail: this is called precipitation. 4 The water runs over the land in streams and rivers or soaks into the ground, flows back to the sea; this gathering of water back into rivers, lakes and seas is called collection, and the journey starts again. 5 For example, a raindrop that lands on you today may once have been in an ocean, in a cloud over another continent, or even drunk by a dinosaur. 6 The heat of the Sun drives the water cycle. 7 Evaporation lifts water from seas, lakes and soil into the air. 8 Plants give off water vapour from their leaves; this is called transpiration. 9 Air cools as it rises, so water vapour condenses high up into clouds. 10 A cloud is made of millions of tiny water drops, or of tiny ice crystals where it is very cold. 11 Rain, snow, sleet and hail are all called precipitation. 12 Some rainwater soaks into the ground and becomes groundwater, which feeds wells and springs. 13 When seawater evaporates the salt stays behind, so rain is fresh water. 14 Most of Earth's water is salty water in the oceans; only a small part is fresh. 15 Much of Earth's fresh water is frozen in ice sheets, huge sheets of ice covering land, and glaciers, slow rivers of ice. 16 The amount of water on Earth stays about the same; it just keeps moving around. ← previous Evaporation and condensationnext → Weather: pressure, wind, clouds and storms↑ back to World This page in Markdown → https://md.mova.elamur.ai/free/en/corpora/school/world/14-the-water-cycle/