SlideShare ist ein Scribd-Unternehmen logo
1 von 40
UNIT 3: PHYSICAL GEOGRAPHY: WATER
1- WHERE IS WATER FOUND?
2- WHAT ARE RIVERS?
3- WHAT ARE OCEANS AND SEAS?
4- WHAT ARE CURRENTS, TIDES AND WAVES?
5- WHAT ARE LAKES?
6- WHAT ARE GROUND WATER AND GLACIERS
FOUND?
7- WHAT PROBLEMS ARE RELATED TO WATER
TODAY?
UNIT 3: PHYSICAL GEOGRAPHY: WATER
OBJECTIVES
Review the water cycle
Learn about water on Earth: Rivers, lakes, sea, oceans
Identify the effects of human action on environment
Interpret graphs
Suggest solutions to problems caused by human action
1- WHERE IS WATER FOUND?
Water on
Earth
71%
97% salt water in
oceans and seas
Covered in water
3% fresh water: rivers, lakes,
groundwater, glaciers, poles
Water on Earth Activity 1 on page 25
1- WHERE IS WATER FOUND?
The water
cycle
1
2 3
4
5
6
7
1 2 3 4
5
6
7
The water cycle
Make a composition explaining
the water cycle.
2- WHAT ARE RIVERS?
RIVERS Permanent currents of water
source It’s the place where a rivers starts
Origin
A spring from ground water
A lake, glacier, acumulation
of rainfall or melting snow
Tributaries Small rivers that flow into a larger one
Basin It’s the area occupied by a river and its tributaries.
2- WHAT ARE RIVERS?
Flow It’s the amount of water a river carries.
Rivers created
from melting
snow.
Larger flow in spring or summer.
Flows varies with the seasons.
Rivers created
from rainfall.
Larger flow in rainy season.
Rivers that only carry
water when it rains.
Mediterranean regions
and wadis in deserts.
2- WHAT ARE RIVERS?
The
importance
of rivers
Rivers are used to transport people and goods.
Rivers provide water supply to people and industries.
Rivers provide water to irrigate our crops.
Domes and hydroelectric power stations on rivers provide electricity.
2- WHAT ARE RIVERS?
Define the following concepts: river, source, tributarie,
basin, flow, canal, reservoir
Explain the different types of rivers according to its flow
Why rivers are so important to human beings?
3- What are oceans and seas?
Oceans and seas They had almost all the Earth’s liquid water.
97%; salt water
Salinity varies with temperature.
Higher temperature More evaporation Higher content in salt
Salinity varies with the areas and shapes seas
Enclosed sea
with small area
More evaporation Higher content in salt
3- What are oceans and seas?
3- What are oceans and seas?
The importance of
oceans and seas
They provide us with food.
They provide us with raw materials and energy (gas,
petroleum).
They attract tourism to the coast.
They are used for transport.
3- What are oceans and seas?
The importance of
oceans and seas
3- What are oceans and seas?
The importance of
oceans and seas
3- What are oceans and seas?
The importance of
oceans and seas
3- What are oceans and seas?
The importance of
oceans and seas
3- What are oceans and seas?
How does oceans and seas salinity varies?
Why are oceans and seas so important to human beings?
4- WHAT ARE CURRENTS, TIDES AND WAVES?
Currents,
tides and
waves
Ocean currents
Tides
Waves
They are large masses of water which circulate
through oceans.
They are the daily rise and fall of the water level
caused by gravitational forces (Sun and Moon).
They are undulations of the surface of water produced
by wind.
High tide: The water level rises.
Low tide: The water level falls.
4- WHAT ARE CURRENTS, TIDES AND WAVES?
Ocean currents
Warm current Cold current
4- WHAT ARE CURRENTS, TIDES AND WAVES?
4- WHAT ARE CURRENTS, TIDES AND WAVES?
5- What are lakes?
Lake It’s a permanent mass of water which have accumulated
inland.
It´’s a lake of salt water.
Inland
sea
Water in lakes origin
Precipitation
Rivers and ground water
Glaciers
5- What are lakes?
The world’s
biggest
lakes
Great Lakes
Originate
from
glaciers.
Larger freshwater lake in the world.
5- What are lakes?
The world’s
biggest
lakes
Caspian Sea
Below sea level
Northern part is frozen in winter because
it´s just 6 metres deep in this part.
5- What are lakes?
The world’s
biggest
lakes
Lake Baikal
Deepest lake in the
world
Largest freshwater
lake by volume in the
world.
Lake Baikal
5- What are lakes?
The world’s
biggest
lakes
Lake Titicaca
Lake Titicaca is 3810 metres
high.
5- What are lakes?
The world’s
biggest
lakes
Lake Chad
5- What are lakes?
The world’s
biggest
lakes Lake Victoria
The Nile perch is an
invasive specie and
the prime reason for
the native fish
extinction.
Its waters run into
Nile.
5- What are lakes?
Define lake and inland sea.
Which are the most important lakes in the world? Why? In which
continent are located?
6- WHERE ARE GROUND WATER AND
GLACIERS FOUND?
Groundwater
It runs and is stored under the ground.
25% of water on continents.
Rainfall percolates through porous rocks or
inflitrates through limestone.
When it reaches
impermeable rocks
forms aquifers.
Impermeable rock
6- WHERE ARE GROUND WATER AND
GLACIERS FOUND?
Groundwater When It finds a way to the surface, then it forms springs.
6- WHERE ARE GROUND WATER AND
GLACIERS FOUND?
Groundwater Why is so valuable groundwater?
It´s a source of drinking
water.
It runs into rivers and
lakes.
It enables plants to grow.
6- WHERE ARE GROUND WATER AND
GLACIERS FOUND?
Glaciers
They make most of the Earth’s fresh water.
It’s a mass of ice formed by the accumulation of snow.
Found in polar regions and highest mountains.
Iceberg
It’s a floating mass of ice.
6- WHERE ARE GROUND WATER AND
GLACIERS FOUND?
What is groundwater?
What is an aquifer? How is it formed?
Why is so valuable groundwater?
What is a glacier? Where can be found?
What is an iceberg?
7- What problems are related to water today?
Water consumption
and distribution
Fresh water on Earth 3%
Ready for consumption 0,014%
Most in glaciers
Water consumption is increasing due to
Growth of the population
Improvements in
standards of living
An excess of water can produce floods.
A shortage of water can produce droughts.
7- What problems are related to water today?
Water pollution
and acid rain
Water pollution
It’s the addition of a large amount of materials to a body of
water.
Water pollution ways:
Directly
Indirectly
Harmful substances are released into
water.
When fertilizers used in fields are
carried into a stream by rain.
7- What problems are related to water today?
Water pollution
and acid rain
Acid rain
Chemicals are released into the atmosphere as gases.
They are absorbedby the water in clouds.
They become part of the rainfall and and
enter the water cycle.
Acid rain
effects
Adverse effects on
Plants and forests
Soil
Human health
Fish, aquatic animals and insects
Buildings
Acid rain
Acid rain
effects
1908 1968
Forest in South Africa
7- What problems are related to water today?
Which percentage of water on Earth is fresn water?
Which percentage of water is ready for consumption? Why?
Why water consumption is increasing?
Which are the problems associated to excess or shortage of water?
How is acid rain formed?
Which are the acid rain effects?

Weitere ähnliche Inhalte

Was ist angesagt?

Bangalore's lakes and impact on ground water
Bangalore's lakes and impact on ground waterBangalore's lakes and impact on ground water
Bangalore's lakes and impact on ground water
Bhargavi Rao
 
Water resource management
Water resource management  Water resource management
Water resource management
Rohan Mohite
 
Chapter 8 water demand management.ppt
Chapter 8  water demand management.pptChapter 8  water demand management.ppt
Chapter 8 water demand management.ppt
Mohammed Salahat
 
Assessment Derived Conservation Strategies for Lakes in Bangalore
Assessment Derived Conservation Strategies  for Lakes in BangaloreAssessment Derived Conservation Strategies  for Lakes in Bangalore
Assessment Derived Conservation Strategies for Lakes in Bangalore
Ekonnect
 
water conservation a global concern
water conservation a global concernwater conservation a global concern
water conservation a global concern
Mohd Danish
 
Scenario of Water Bodies (Lakes) In Urban Areas- A case study on Bellandur La...
Scenario of Water Bodies (Lakes) In Urban Areas- A case study on Bellandur La...Scenario of Water Bodies (Lakes) In Urban Areas- A case study on Bellandur La...
Scenario of Water Bodies (Lakes) In Urban Areas- A case study on Bellandur La...
IOSR Journals
 
Water Resources Management Financing in Vietnam
Water Resources Management Financing in VietnamWater Resources Management Financing in Vietnam
Water Resources Management Financing in Vietnam
GWP SOUTHEAST ASIA
 
Water and Wastewater Mangement in India 2010 - Sample
Water and Wastewater Mangement in India 2010 - SampleWater and Wastewater Mangement in India 2010 - Sample
Water and Wastewater Mangement in India 2010 - Sample
Netscribes, Inc.
 
Rural water supply Lebanon
Rural water supply LebanonRural water supply Lebanon
Rural water supply Lebanon
Tarek Amro
 

Was ist angesagt? (20)

A STUDY ON THE IMPACT OF POLLUTION IN BELLANDUR LAKE DUE TO URBANIZATION
A STUDY ON THE IMPACT OF POLLUTION IN BELLANDUR LAKE DUE TO URBANIZATIONA STUDY ON THE IMPACT OF POLLUTION IN BELLANDUR LAKE DUE TO URBANIZATION
A STUDY ON THE IMPACT OF POLLUTION IN BELLANDUR LAKE DUE TO URBANIZATION
 
Bangalore's lakes and impact on ground water
Bangalore's lakes and impact on ground waterBangalore's lakes and impact on ground water
Bangalore's lakes and impact on ground water
 
P2 3-mohamed-al mulla-uae-state-of-water-report
P2 3-mohamed-al mulla-uae-state-of-water-reportP2 3-mohamed-al mulla-uae-state-of-water-report
P2 3-mohamed-al mulla-uae-state-of-water-report
 
Water resource management
Water resource management  Water resource management
Water resource management
 
IISC 1
IISC 1IISC 1
IISC 1
 
Water harvesting – a solution to drought & falling level of ground water ...
Water harvesting – a solution to drought & falling level of ground water ...Water harvesting – a solution to drought & falling level of ground water ...
Water harvesting – a solution to drought & falling level of ground water ...
 
Watershed management for sustainable water supply
Watershed management for sustainable water supplyWatershed management for sustainable water supply
Watershed management for sustainable water supply
 
RECONSTRUCTION OF LAKES
RECONSTRUCTION OF LAKES RECONSTRUCTION OF LAKES
RECONSTRUCTION OF LAKES
 
Chapter 8 water demand management.ppt
Chapter 8  water demand management.pptChapter 8  water demand management.ppt
Chapter 8 water demand management.ppt
 
Assessment Derived Conservation Strategies for Lakes in Bangalore
Assessment Derived Conservation Strategies  for Lakes in BangaloreAssessment Derived Conservation Strategies  for Lakes in Bangalore
Assessment Derived Conservation Strategies for Lakes in Bangalore
 
water conservation a global concern
water conservation a global concernwater conservation a global concern
water conservation a global concern
 
Scenario of Water Bodies (Lakes) In Urban Areas- A case study on Bellandur La...
Scenario of Water Bodies (Lakes) In Urban Areas- A case study on Bellandur La...Scenario of Water Bodies (Lakes) In Urban Areas- A case study on Bellandur La...
Scenario of Water Bodies (Lakes) In Urban Areas- A case study on Bellandur La...
 
Tulloch Reservoir and the Drought of 2012-201?
Tulloch Reservoir and the Drought of 2012-201?Tulloch Reservoir and the Drought of 2012-201?
Tulloch Reservoir and the Drought of 2012-201?
 
Water supply, use, pollution and treatments
Water supply, use, pollution and treatmentsWater supply, use, pollution and treatments
Water supply, use, pollution and treatments
 
Water Resources Management Financing in Vietnam
Water Resources Management Financing in VietnamWater Resources Management Financing in Vietnam
Water Resources Management Financing in Vietnam
 
Rejuvenation of lakes
Rejuvenation of lakesRejuvenation of lakes
Rejuvenation of lakes
 
Water and Wastewater Mangement in India 2010 - Sample
Water and Wastewater Mangement in India 2010 - SampleWater and Wastewater Mangement in India 2010 - Sample
Water and Wastewater Mangement in India 2010 - Sample
 
Rural water supply Lebanon
Rural water supply LebanonRural water supply Lebanon
Rural water supply Lebanon
 
SC Water School
SC Water SchoolSC Water School
SC Water School
 
Aggregateact
AggregateactAggregateact
Aggregateact
 

Ähnlich wie Unit 3 water

My Chehalis Watershed Pledge
My Chehalis Watershed PledgeMy Chehalis Watershed Pledge
My Chehalis Watershed Pledge
amtcarlson
 
Online assignment preethui
Online assignment preethuiOnline assignment preethui
Online assignment preethui
unni2012
 

Ähnlich wie Unit 3 water (20)

Earths water
Earths waterEarths water
Earths water
 
Waters on earth
Waters on earthWaters on earth
Waters on earth
 
Water earth
Water earthWater earth
Water earth
 
Water Resources.pptx
Water Resources.pptxWater Resources.pptx
Water Resources.pptx
 
Water Resources.pptx
Water Resources.pptxWater Resources.pptx
Water Resources.pptx
 
Earth science Water Resources Bert & Beni
Earth science Water Resources Bert & BeniEarth science Water Resources Bert & Beni
Earth science Water Resources Bert & Beni
 
The price of water 4.1
The price of water 4.1The price of water 4.1
The price of water 4.1
 
My Chehalis Watershed Pledge
My Chehalis Watershed PledgeMy Chehalis Watershed Pledge
My Chehalis Watershed Pledge
 
Unit e fresh & saltwater systems
Unit e   fresh & saltwater systemsUnit e   fresh & saltwater systems
Unit e fresh & saltwater systems
 
My chehalis watershed pledge 9 11 2014 (1)
My chehalis watershed pledge 9 11 2014 (1)My chehalis watershed pledge 9 11 2014 (1)
My chehalis watershed pledge 9 11 2014 (1)
 
Unit 3 - water
Unit 3 - waterUnit 3 - water
Unit 3 - water
 
Online assignment preethui
Online assignment preethuiOnline assignment preethui
Online assignment preethui
 
OCEAN PPT.pptx
OCEAN PPT.pptxOCEAN PPT.pptx
OCEAN PPT.pptx
 
OCEAN DAY 11.pptx
OCEAN DAY 11.pptxOCEAN DAY 11.pptx
OCEAN DAY 11.pptx
 
Ocean project
Ocean projectOcean project
Ocean project
 
An introduction to Desalination
An introduction to DesalinationAn introduction to Desalination
An introduction to Desalination
 
Classification of lakes
Classification of lakes Classification of lakes
Classification of lakes
 
Oceanography
OceanographyOceanography
Oceanography
 
03 unit 4 water
03 unit 4 water03 unit 4 water
03 unit 4 water
 
Chapter 4 Water Resource
Chapter 4 Water Resource Chapter 4 Water Resource
Chapter 4 Water Resource
 

Mehr von Carlos Arrese

Mehr von Carlos Arrese (20)

Introduction to history
Introduction to historyIntroduction to history
Introduction to history
 
Unit 9 renaissance and reformation
Unit 9 renaissance and reformationUnit 9 renaissance and reformation
Unit 9 renaissance and reformation
 
Unit 7 the age of discovery
Unit 7 the age of discoveryUnit 7 the age of discovery
Unit 7 the age of discovery
 
El Franquismo
El Franquismo El Franquismo
El Franquismo
 
Indice preguntas 1 a 13
Indice preguntas 1 a 13Indice preguntas 1 a 13
Indice preguntas 1 a 13
 
Unit 11 Ancient Rome
Unit 11 Ancient RomeUnit 11 Ancient Rome
Unit 11 Ancient Rome
 
Unit 10 Ancient Greece
Unit 10 Ancient GreeceUnit 10 Ancient Greece
Unit 10 Ancient Greece
 
Unit 9 Early Civilizations.pptx
Unit 9 Early Civilizations.pptx  Unit 9 Early Civilizations.pptx
Unit 9 Early Civilizations.pptx
 
Tema 7 Los espacios de servicios
Tema 7  Los espacios de serviciosTema 7  Los espacios de servicios
Tema 7 Los espacios de servicios
 
Tema 6 los espacios industriales
Tema 6  los espacios industrialesTema 6  los espacios industriales
Tema 6 los espacios industriales
 
Unit 4 weather and climate
Unit 4 weather and climateUnit 4 weather and climate
Unit 4 weather and climate
 
Unit 4 Weather and climate
Unit 4 Weather and climateUnit 4 Weather and climate
Unit 4 Weather and climate
 
Tema 5 los espacios del sector primario
Tema 5  los espacios del sector primarioTema 5  los espacios del sector primario
Tema 5 los espacios del sector primario
 
Recursos hidricos
Recursos hidricosRecursos hidricos
Recursos hidricos
 
Tema 2 clima
Tema 2   climaTema 2   clima
Tema 2 clima
 
Unit 2 Physical Geography
Unit 2 Physical GeographyUnit 2 Physical Geography
Unit 2 Physical Geography
 
Unit 1 Maps
Unit 1 MapsUnit 1 Maps
Unit 1 Maps
 
Tema 1 Relieve
Tema 1  RelieveTema 1  Relieve
Tema 1 Relieve
 
Unit 9 Renaissance and Reformation
Unit 9 Renaissance and ReformationUnit 9 Renaissance and Reformation
Unit 9 Renaissance and Reformation
 
Tema 10 El imperio de los Austrias
Tema 10 El imperio de los AustriasTema 10 El imperio de los Austrias
Tema 10 El imperio de los Austrias
 

Kürzlich hochgeladen

Russian Escort Service in Delhi 11k Hotel Foreigner Russian Call Girls in Delhi
Russian Escort Service in Delhi 11k Hotel Foreigner Russian Call Girls in DelhiRussian Escort Service in Delhi 11k Hotel Foreigner Russian Call Girls in Delhi
Russian Escort Service in Delhi 11k Hotel Foreigner Russian Call Girls in Delhi
kauryashika82
 
Making and Justifying Mathematical Decisions.pdf
Making and Justifying Mathematical Decisions.pdfMaking and Justifying Mathematical Decisions.pdf
Making and Justifying Mathematical Decisions.pdf
Chris Hunter
 
An Overview of Mutual Funds Bcom Project.pdf
An Overview of Mutual Funds Bcom Project.pdfAn Overview of Mutual Funds Bcom Project.pdf
An Overview of Mutual Funds Bcom Project.pdf
SanaAli374401
 

Kürzlich hochgeladen (20)

Z Score,T Score, Percential Rank and Box Plot Graph
Z Score,T Score, Percential Rank and Box Plot GraphZ Score,T Score, Percential Rank and Box Plot Graph
Z Score,T Score, Percential Rank and Box Plot Graph
 
INDIA QUIZ 2024 RLAC DELHI UNIVERSITY.pptx
INDIA QUIZ 2024 RLAC DELHI UNIVERSITY.pptxINDIA QUIZ 2024 RLAC DELHI UNIVERSITY.pptx
INDIA QUIZ 2024 RLAC DELHI UNIVERSITY.pptx
 
Ecological Succession. ( ECOSYSTEM, B. Pharmacy, 1st Year, Sem-II, Environmen...
Ecological Succession. ( ECOSYSTEM, B. Pharmacy, 1st Year, Sem-II, Environmen...Ecological Succession. ( ECOSYSTEM, B. Pharmacy, 1st Year, Sem-II, Environmen...
Ecological Succession. ( ECOSYSTEM, B. Pharmacy, 1st Year, Sem-II, Environmen...
 
Russian Escort Service in Delhi 11k Hotel Foreigner Russian Call Girls in Delhi
Russian Escort Service in Delhi 11k Hotel Foreigner Russian Call Girls in DelhiRussian Escort Service in Delhi 11k Hotel Foreigner Russian Call Girls in Delhi
Russian Escort Service in Delhi 11k Hotel Foreigner Russian Call Girls in Delhi
 
SECOND SEMESTER TOPIC COVERAGE SY 2023-2024 Trends, Networks, and Critical Th...
SECOND SEMESTER TOPIC COVERAGE SY 2023-2024 Trends, Networks, and Critical Th...SECOND SEMESTER TOPIC COVERAGE SY 2023-2024 Trends, Networks, and Critical Th...
SECOND SEMESTER TOPIC COVERAGE SY 2023-2024 Trends, Networks, and Critical Th...
 
Advance Mobile Application Development class 07
Advance Mobile Application Development class 07Advance Mobile Application Development class 07
Advance Mobile Application Development class 07
 
Web & Social Media Analytics Previous Year Question Paper.pdf
Web & Social Media Analytics Previous Year Question Paper.pdfWeb & Social Media Analytics Previous Year Question Paper.pdf
Web & Social Media Analytics Previous Year Question Paper.pdf
 
Accessible design: Minimum effort, maximum impact
Accessible design: Minimum effort, maximum impactAccessible design: Minimum effort, maximum impact
Accessible design: Minimum effort, maximum impact
 
Grant Readiness 101 TechSoup and Remy Consulting
Grant Readiness 101 TechSoup and Remy ConsultingGrant Readiness 101 TechSoup and Remy Consulting
Grant Readiness 101 TechSoup and Remy Consulting
 
SOCIAL AND HISTORICAL CONTEXT - LFTVD.pptx
SOCIAL AND HISTORICAL CONTEXT - LFTVD.pptxSOCIAL AND HISTORICAL CONTEXT - LFTVD.pptx
SOCIAL AND HISTORICAL CONTEXT - LFTVD.pptx
 
How to Give a Domain for a Field in Odoo 17
How to Give a Domain for a Field in Odoo 17How to Give a Domain for a Field in Odoo 17
How to Give a Domain for a Field in Odoo 17
 
Making and Justifying Mathematical Decisions.pdf
Making and Justifying Mathematical Decisions.pdfMaking and Justifying Mathematical Decisions.pdf
Making and Justifying Mathematical Decisions.pdf
 
An Overview of Mutual Funds Bcom Project.pdf
An Overview of Mutual Funds Bcom Project.pdfAn Overview of Mutual Funds Bcom Project.pdf
An Overview of Mutual Funds Bcom Project.pdf
 
Mehran University Newsletter Vol-X, Issue-I, 2024
Mehran University Newsletter Vol-X, Issue-I, 2024Mehran University Newsletter Vol-X, Issue-I, 2024
Mehran University Newsletter Vol-X, Issue-I, 2024
 
Holdier Curriculum Vitae (April 2024).pdf
Holdier Curriculum Vitae (April 2024).pdfHoldier Curriculum Vitae (April 2024).pdf
Holdier Curriculum Vitae (April 2024).pdf
 
Advanced Views - Calendar View in Odoo 17
Advanced Views - Calendar View in Odoo 17Advanced Views - Calendar View in Odoo 17
Advanced Views - Calendar View in Odoo 17
 
Key note speaker Neum_Admir Softic_ENG.pdf
Key note speaker Neum_Admir Softic_ENG.pdfKey note speaker Neum_Admir Softic_ENG.pdf
Key note speaker Neum_Admir Softic_ENG.pdf
 
PROCESS RECORDING FORMAT.docx
PROCESS      RECORDING        FORMAT.docxPROCESS      RECORDING        FORMAT.docx
PROCESS RECORDING FORMAT.docx
 
Nutritional Needs Presentation - HLTH 104
Nutritional Needs Presentation - HLTH 104Nutritional Needs Presentation - HLTH 104
Nutritional Needs Presentation - HLTH 104
 
Mattingly "AI & Prompt Design: The Basics of Prompt Design"
Mattingly "AI & Prompt Design: The Basics of Prompt Design"Mattingly "AI & Prompt Design: The Basics of Prompt Design"
Mattingly "AI & Prompt Design: The Basics of Prompt Design"
 

Unit 3 water

  • 1. UNIT 3: PHYSICAL GEOGRAPHY: WATER 1- WHERE IS WATER FOUND? 2- WHAT ARE RIVERS? 3- WHAT ARE OCEANS AND SEAS? 4- WHAT ARE CURRENTS, TIDES AND WAVES? 5- WHAT ARE LAKES? 6- WHAT ARE GROUND WATER AND GLACIERS FOUND? 7- WHAT PROBLEMS ARE RELATED TO WATER TODAY?
  • 2. UNIT 3: PHYSICAL GEOGRAPHY: WATER OBJECTIVES Review the water cycle Learn about water on Earth: Rivers, lakes, sea, oceans Identify the effects of human action on environment Interpret graphs Suggest solutions to problems caused by human action
  • 3. 1- WHERE IS WATER FOUND? Water on Earth 71% 97% salt water in oceans and seas Covered in water 3% fresh water: rivers, lakes, groundwater, glaciers, poles Water on Earth Activity 1 on page 25
  • 4. 1- WHERE IS WATER FOUND? The water cycle 1 2 3 4 5 6 7 1 2 3 4 5 6 7 The water cycle Make a composition explaining the water cycle.
  • 5. 2- WHAT ARE RIVERS? RIVERS Permanent currents of water source It’s the place where a rivers starts Origin A spring from ground water A lake, glacier, acumulation of rainfall or melting snow Tributaries Small rivers that flow into a larger one Basin It’s the area occupied by a river and its tributaries.
  • 6. 2- WHAT ARE RIVERS? Flow It’s the amount of water a river carries. Rivers created from melting snow. Larger flow in spring or summer. Flows varies with the seasons. Rivers created from rainfall. Larger flow in rainy season. Rivers that only carry water when it rains. Mediterranean regions and wadis in deserts.
  • 7. 2- WHAT ARE RIVERS? The importance of rivers Rivers are used to transport people and goods. Rivers provide water supply to people and industries. Rivers provide water to irrigate our crops. Domes and hydroelectric power stations on rivers provide electricity.
  • 8. 2- WHAT ARE RIVERS? Define the following concepts: river, source, tributarie, basin, flow, canal, reservoir Explain the different types of rivers according to its flow Why rivers are so important to human beings?
  • 9. 3- What are oceans and seas? Oceans and seas They had almost all the Earth’s liquid water. 97%; salt water Salinity varies with temperature. Higher temperature More evaporation Higher content in salt Salinity varies with the areas and shapes seas Enclosed sea with small area More evaporation Higher content in salt
  • 10. 3- What are oceans and seas?
  • 11. 3- What are oceans and seas? The importance of oceans and seas They provide us with food. They provide us with raw materials and energy (gas, petroleum). They attract tourism to the coast. They are used for transport.
  • 12. 3- What are oceans and seas? The importance of oceans and seas
  • 13. 3- What are oceans and seas? The importance of oceans and seas
  • 14. 3- What are oceans and seas? The importance of oceans and seas
  • 15. 3- What are oceans and seas? The importance of oceans and seas
  • 16. 3- What are oceans and seas? How does oceans and seas salinity varies? Why are oceans and seas so important to human beings?
  • 17. 4- WHAT ARE CURRENTS, TIDES AND WAVES? Currents, tides and waves Ocean currents Tides Waves They are large masses of water which circulate through oceans. They are the daily rise and fall of the water level caused by gravitational forces (Sun and Moon). They are undulations of the surface of water produced by wind. High tide: The water level rises. Low tide: The water level falls.
  • 18. 4- WHAT ARE CURRENTS, TIDES AND WAVES? Ocean currents Warm current Cold current
  • 19. 4- WHAT ARE CURRENTS, TIDES AND WAVES?
  • 20. 4- WHAT ARE CURRENTS, TIDES AND WAVES?
  • 21. 5- What are lakes? Lake It’s a permanent mass of water which have accumulated inland. It´’s a lake of salt water. Inland sea Water in lakes origin Precipitation Rivers and ground water Glaciers
  • 22. 5- What are lakes? The world’s biggest lakes Great Lakes Originate from glaciers. Larger freshwater lake in the world.
  • 23. 5- What are lakes? The world’s biggest lakes Caspian Sea Below sea level Northern part is frozen in winter because it´s just 6 metres deep in this part.
  • 24. 5- What are lakes? The world’s biggest lakes Lake Baikal Deepest lake in the world Largest freshwater lake by volume in the world.
  • 26. 5- What are lakes? The world’s biggest lakes Lake Titicaca Lake Titicaca is 3810 metres high.
  • 27. 5- What are lakes? The world’s biggest lakes Lake Chad
  • 28. 5- What are lakes? The world’s biggest lakes Lake Victoria The Nile perch is an invasive specie and the prime reason for the native fish extinction. Its waters run into Nile.
  • 29. 5- What are lakes? Define lake and inland sea. Which are the most important lakes in the world? Why? In which continent are located?
  • 30. 6- WHERE ARE GROUND WATER AND GLACIERS FOUND? Groundwater It runs and is stored under the ground. 25% of water on continents. Rainfall percolates through porous rocks or inflitrates through limestone. When it reaches impermeable rocks forms aquifers. Impermeable rock
  • 31. 6- WHERE ARE GROUND WATER AND GLACIERS FOUND? Groundwater When It finds a way to the surface, then it forms springs.
  • 32. 6- WHERE ARE GROUND WATER AND GLACIERS FOUND? Groundwater Why is so valuable groundwater? It´s a source of drinking water. It runs into rivers and lakes. It enables plants to grow.
  • 33. 6- WHERE ARE GROUND WATER AND GLACIERS FOUND? Glaciers They make most of the Earth’s fresh water. It’s a mass of ice formed by the accumulation of snow. Found in polar regions and highest mountains. Iceberg It’s a floating mass of ice.
  • 34. 6- WHERE ARE GROUND WATER AND GLACIERS FOUND? What is groundwater? What is an aquifer? How is it formed? Why is so valuable groundwater? What is a glacier? Where can be found? What is an iceberg?
  • 35. 7- What problems are related to water today? Water consumption and distribution Fresh water on Earth 3% Ready for consumption 0,014% Most in glaciers Water consumption is increasing due to Growth of the population Improvements in standards of living An excess of water can produce floods. A shortage of water can produce droughts.
  • 36. 7- What problems are related to water today? Water pollution and acid rain Water pollution It’s the addition of a large amount of materials to a body of water. Water pollution ways: Directly Indirectly Harmful substances are released into water. When fertilizers used in fields are carried into a stream by rain.
  • 37. 7- What problems are related to water today? Water pollution and acid rain Acid rain Chemicals are released into the atmosphere as gases. They are absorbedby the water in clouds. They become part of the rainfall and and enter the water cycle. Acid rain effects Adverse effects on Plants and forests Soil Human health Fish, aquatic animals and insects Buildings
  • 40. 7- What problems are related to water today? Which percentage of water on Earth is fresn water? Which percentage of water is ready for consumption? Why? Why water consumption is increasing? Which are the problems associated to excess or shortage of water? How is acid rain formed? Which are the acid rain effects?