Year 7 JacPlus 10.7 Lesson

Year 7 Water in the World
JacPlus 10.7

Lesson Goals

By the end of this subtopic, you will be able to:

• identify and explain the three main uses of water by people

• describe how the distribution of water changes with a growing population

• identify what virtual water is and describe how it affects water consumption

Click on it or touch it and it will automatically enlarge.

If a picture is too small...

https://www.youtube.com/watch?v=IPU0S4XQGaU

​Global Water Crisis - Behind the News
3:30 mins

Introduction: Water Scarcity

​With only 1% fresh water available, and the earth's population at over 8 billion, not having enough water compared to the demand for it is already a problem, and will continue into the future.

​

https://www.youtube.com/watch?v=TbCwZyJEb8Y

​Balancing water demand for a growing world population
3:30 mins

Global water and population

Multiple Choice

What is suggested as the solution to our global water crisis?

• Ignoring the problem

• Making people pay for the water they use

• Decreasing the cost of water

• Melting more ice and snow

Multiple Select

Why is making people pay for water they use likely to help with water management? Choose all those that apply.

• It will make people use less water

• It will discourage water waste and pollution

• It will create more money to clean the water we pollute

• It will encourage more water wasting

Multiple Select

In what areas is more money for water needed? Choose all that apply.

• Infrastructure: pipes, taps, etc.

• Innovation, research and development

• Recycling and reuse of water

• Planting and supporting natural ecosystems

Water Scarcity: Think-Pair-SHare

With a partner, discuss this question:

Why should we care what happens around the world? Will it impact us? If so, how?
Think about:
A. Our connections to other people
B. Immigration
C. How many people Australia can hold

We use water to grow food, such as farmers using sprinklers to water plants. This is called "agricultural use".

​Ways to use water #1

We use water to make things in factories and produce electricity. This is called "business use".

​Ways to use water #2

We use water at home, such as dishes, washing and cooking. This is called "domestic use".

​Ways to use water #3

Multiple Choice

Using water to make food at home is what sort of use?

• Business

• Farming

• Domestic

• Global

Multiple Choice

Using bricks to make houses uses water. What sort of use is this?

• Agricultural

• Domestic

• Business

• Global

Match

Match the following

• Cup of tea at home

• KFC using electricity from water

• Farmer growing fruit

• Having a shower at home

• Buying a coffee from Timber Cafe

Domestic use

Business

Agricultural

Domestic

Business

• Domestic use

• Business

• Agricultural

• Domestic

• Business

The total amount of water STAYS THE SAME.
BUT....
The population of the world keeps getting bigger and demand for water INCREASES.

​

Problems with using water

Water Inequality :(

Some countries use more water than others

Some countries use more water than others.
For example:
1. The USA uses twice as much as the global average
2. Chinese people use twice as much per person as other countries.

Study the map on the next slide.
It shows how different regions of the world mostly use water.

Green is for Agriculture.
Orange is for Business.
Blue is for Domestic.

​

Different uses of water

Study the map below by using the legend. ​

Global use of water

Hotspot

Choose all the countries which use water for agriculture (green) AND are SOUTH of the Equator

Multiple Choice

The map of global water use shows us that all countries use water for the same reasons.

• True

• False

Multiple Choice

The map shows us that more people use water for...

• Agriculture (green)

• Business (orange)

• Domestic (blue)

• They are all equal

Study the diagram on the right.

It shows how different regions of the world use water.

Next, answer the questions that follow.

​

Comparing Water Use

Hotspot

Which region has the highest use of water for Agriculture (green)?

Reorder

Put the regions in the order of who uses the most water for Industry. Order it from smallest to largest use.

• Central Asia (5%) and Africa (7%)

• South America (10%)

• South-East Asia (12%)

• North America (48%)

• Europe (53%)

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

The Table on the right shows how Australian's use water.
Study the Table on the right and MEMORISE AS MANY FIGURES as you can.

​

Fresh Water Use in Australia

Match

Match the following uses to the correct number to the correct water use. You may work with a partner to do this.

• Agriculture

• Urban

• Horticulture

• Industry

• Mining

70%

12%

10%

3%

2%

• 70%

• 12%

• 10%

• 3%

• 2%

Open Ended

Read this text and then answer the question:

Around 70 per cent of Australia’s fresh water is used as irrigation for farming. Many crops are grown in dry areas where up to half the available water evaporates from the soil surface or seeps down too low into the ground for plant roots to reach it. Therefore, more water is applied than is actually needed by plants.

Question: Why do farmers use more water than they need?

You have heard of blue, green, grey and black water, but did you know that another type of water exists?
VIRTUAL Water.
VW is water that is used to make things we enjoy. It is also called "hidden water" and our "Water Footprint".

​

Virtual Water

https://www.youtube.com/watch?v=48g7ATzuBIQ

​What is a water footprint?
1:52 mins

Virtual Water's Footprint

Multiple Choice

Virtual water is all the water used...

• in the transportation of goods and services
• in the consumption of goods and services
• in the production of goods and services
• in the storage of goods and services

Multiple Choice

Which production uses more water than any other?

• Agriculture and food production

• Business production of goods and services

• Domestic home use

• Electricity production

Open Ended

Question: In your own words, explain what "hidden" or "virtual" water is.

Open Ended

Read the test and answer the question:

Regions that are water stressed and that export (sell) food and other products (such as Australia and some countries in Africa and Asia) are also effectively exporting their precious water in these goods.

Question: Why is virtual water a problem for already water stressed regions?

Multiple Choice

Importing something means buying it from another country.

Some countries import food because they don't have enough land or water to grow their own. Virtual water is important to them to understand because...

• it is the latest idea

• it makes them popular to understand it

• it is part of the food they import

• They can't produce enough food for themselves.

Hotspot

This map shows water stressed countries.

Identify two countries who probably import a lot of virtual water products.

Hotspot

This map shows water stressed countries. Identify two countries which probably export (sell) a lot of virtual water products.

Global Water Footprint

The water footprint of an individual or country is the total volume of fresh water that is used to produce the goods and services consumed by the individual or country. It includes the use of:

• blue water (rivers, lakes, aquifers)

• green water (rainfall used for crop growth)

• grey water (water polluted after agricultural, industrial and household use).

Not all goods consumed in one particular country are produced in that country — some foods and products are imported. Therefore, the water footprint consists of two parts:
1. use of domestic water resources
2. use of water outside the borders of the country.

​

Multiple Choice

Water footprint is the total volume of fresh water...

• that is used to produce food and drink in a country.

• that is use to sell goods and services to other countries.

• that is used to produce the goods and services consumed by the individual or country.

• that is found in any country on earth.

Japan, with a footprint of 1200 cubic metres per person per year, has about 65 per cent of its total water footprint outside its borders, meaning a lot of its water is imported in the form of consumer goods and food. On the other hand, only about 7 per cent of the Chinese water footprint falls outside China.

​Japan vs China

In the United States, the average water footprint per year per capita is 2480 cubic metres per person per year, which is enough to fill an Olympic swimming pool. In China, the average water footprint is 1071 cubic metres per year. The figure for Australia is 1393 cubic metres per person per year.

USA vs China vs Aus

Water Footprint: Comparing Countries

Reorder

Reorder the following from smallest to largest footprint

• China

• Japan

• Australia

• America

1

2

3

4

• 1
• 2
• 3
• 4

Hotspot

Identify two countries who have a water footprint above 2100 litres per capita (person) each year.

Checking your understanding

​Class Quizizz (Mastery)

We will end this lesson with a class Quizizz on Mastery mode.
Remember, the idea is to get the question right, but to master the knowledge, not necessarily on your first try!
GOOD LUCK!