Vocabulary Unit 3

• Water Cycle : It is the process when the water changes its physical state.

• Fresh water : It is the water found in rivers, lakes, glaciers, groundwater and at the poles.

• Groundwater : It is the water run and is scored under the ground.

• Flow : It is the amount of water it carries

• Basin : It is the area occupied by a river and its tributaries.

• Tributaries : It is smaller rivers flowing into a large river.

• Source : It is the place of a river starts.

• Glaciers : They are masses of ice created by the accumulation of snow.

• Lakes : They are permanent masses of water which have accumulated inland.

• Wadis : They are basins in the desert.

• Rivers : They are permanent currents of water

• Canals : It is build by human beings, and used to transport water.

• Reservoirs : They are artificial lakes to store water.

• Water supply : It is the water in reservoirs and is offered to people and industries.

• Dams : They are build of human beings used to produce electricity.

• Hydroelectric power station : It is a station used to produced electricity through the water.

• Salinity : It is the amount of salt with containing the oceans and seas.

• Warm current : These currents are produced when the temperature of a current is higher than the water around it.

• Cold current : These currents are produced when the temperature of a current is colder than the water around it.

• Tides : They are the diary rise and fall of the water level. They are caused by the gravitational forces of the Moon and the Sun.

• Waves : They are undulations of the surface of the water produced by wind.

• High tide : This tide is produced when rise the level of sea.

• Low tide : This tide is produced when falls the level of sea.

• Lagoons : It is smaller lakes.

• Inland seas : It is a saltwater lake.

• Ocean currents : They are large masses of water, similar to rivers, which circulate through oceans.

• Aquifers : It is forms when the water can´t pass through the impermeable rocks

• Springs : It is forms when groundwater finds a way to the surface. They can be cold or hold water.

• Drinking water : It is the water you can drink. Groundwater is valuable because there are drinking water.

• Icebergs : It is a floating mass of ice.

• Consumption : It is the fresh water which use the human being for life. It is only 0.014%.

• Droughts : It is shortage of water.

• Floods : It is excess of water

• Water Pollution : It is large amount of materials are added to a body of water.

• Acid rain: It contains harmful chemicals such as sulfur and nitrogen. These chemicals are released into the atmosphere as gases.