Sec 1 geog unit 4 lesson 1

Sec 1 geog unit 4 lesson 1

• 1.
  Chong Boon Secondary GeographyDepartment Sec 1 Geography Unit 4 Lesson 1 Water Supply: Will our taps run dry?
• 2.
  Thinking questions • Whatis water shortage? • Which locations in the world are facing water shortage? • Why does water shortage occur? • How does water shortage impact people and countries? • How can Singapore avoid water shortage?
• 3.
  Lesson Objectives • Inthis lesson, you will –Explore the hydrological cycle –Identify the uses of water –Define water shortage.
• 4.
  The hydrological cycle •Commonly known as the water cycle. • Continuous movement of water from the earth’s surface to the atmosphere and back again. • Earth is a ‘closed system’ • Water is trapped within the system in its various forms (solid, liquid and gaseous)
• 5.
  Key Vocabulary 1. Evaporation 2.Transpiration 3. Condensation 4. Precipitation 5. Infiltration 6. Surface runoff 7. Groundwater flow
• 6.
  Name : () Perserverance 1/2/3 Date:
• 7.
  Uses of water •Fresh water has many uses • Fresh water usage is split into 3 main uses –Industry 22% –Domestic use 8% –Agriculture 70%
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  Domestic use • Consumption –Water that is consumed directly or through food intake. • Hygiene – Water that is used to maintain general hygiene and personal hygiene. – Bathing / Flushing / etc. • Amenity use – Washing home / car / Gardening / etc.
• 9.
  Domestic use cont’ •Volume and way of use varies between homes. • Cultural practices and climatic conditions also affect use. • Compare the use of a typical Singaporean in 2011 (153 litres) against a Canadian (305 litres)
• 10.
  Let’s look atExercise 2 • What is a pie chart? • How are pie charts useful? • Turn to Pg 125 of your textbook.
• 11.
  For the respectiveitems, identify which country has a higher usage. Count the difference in percentage. Shower: Kitchen Sink: Laundry: Flushing Cistern: Washbasin: Given an average Singaporean uses 153 litres of water and an average Canadian uses 305 litres, calculate how much more water is used for showering by the Canadians. L
• 12.
  Economic use • Agriculture –Greatest use of water globally – Water used for growing crops – Food and non-food crops – Increase global population leads to increase in food demand and increase in agricultural water use. – Irrigation is the key way to increase agricultural water use. Read Pg 127
• 13.
  Economic use • Industry –Constitutes 22% of total global water use. – Over half is used for power generation • Nuclear, hydropower, thermal power. – Water is used in all manufacturing processes either directly as a component or as a coolant. – Tourism Industry also uses a huge amount of water with increase in tourists, water use will increase rapidly. Read Pg 128
• 14.
  Water footprint • Theamount of water you use. • Total volume of water used to produce the goods and services used per person. • Countries that use more water have larger water footprints. • Developed countries and countries that produce a lot of energy / agriculture have larger footprints. Read Pg 129
• 15.
  Water Shortage • Waterlevel usage exceeds the supply available. • Water shortage is highly dependent on the amount of humans living there and their activities. • Common action to combat short term water shortage is to ration water.
• 16.
  Summary Are you nowable to • Identify and explain the hydrological cycle? • List some common uses of water? • Define water shortage?
• 17.
  Let’s do a summary exercise
• 18.
  Let’s practice drawinga diagram of a hydrological cycle