Unit 3 - WATER
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Unit 3 - WATER

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1º ESO BILINGUAL HISTORY. SANTILLANA CLASS BOOK

1º ESO BILINGUAL HISTORY. SANTILLANA CLASS BOOK

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Unit 3 - WATER Unit 3 - WATER Presentation Transcript

  • Unit 3 WATER
  • 1- Where is water found? - On Earth: 71% of the Earth’s surface is covered by water (salt water is 97%, fresh water just 3%).
  • Activities Exercises 1 and 2 on page 25.
  • 2- What are rivers? -River source -Tributaries -Basin -Flow (depends on the season)
  • The importance of rivers -Transport -Water supply: Canals, reservoirs -Electricity: dams, power stations
  • Activities Exercise 1 on page 26
  • 3- What are oceans and seas? They hold almost all the world’s liquid water, that is salt water. Salinity is different depending on if the sea is warmer or colder. Warm = + salt Cold = - salt
  • The importance of oceans and seas -Food -Raw materials -Energy -Tourism -Transport
  • 4- What are currents, tides and waves? Map of ocean currents
  • Ocean currents
  • Tides
  • Waves
  • Activities Exercise 1 on page 28.
  • 5- What are lakes? Different terms: -Lake -Lagoon (small) -Inland sea (salt water) Different origins: -Precipitation -Rivers or groundwater -Glaciers
  • Activities Exercise 1 on page 29.
  • 6- Where are groundwater and glaciers found? GROUNDWATER. Aquifers.
  • Hot and cold springs
  • The importance of groundwater -Drinking water -Source for rivers and lakes -To grow plants
  • Glaciers
  • Icebergs
  • Homework Activity 1 on page 30.
  • 7- What problems are related to water today? WATER CONSUMPTION AND DISTRIBUTION -3% Fresh water -> 0,014% available -Increase in population -> increase in consumption -Bad distribution -Consequences: droughts or floods
  • Water pollution and acid rain
  • Activities Exercises 1 and 3 on page 31.
  • Work at home Exercises 1, 4 and 5 on pages 32-33.