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Geography > Geography Test > Flashcards

Geography Test Flashcards

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1
Q

In an average year how much rain falls on Earth

A

577,000km3

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2
Q

How much of the annual rainfall falls on the land and evaporates

A

74,000km3 / 62%

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3
Q

What is the remaining of the percent that runs off the land

A

35%

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4
Q

How much of our water ends up in our rivers

A

12%

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5
Q

Which river carries the most water

A

The Amazon River carries more water than any other river on Earth

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6
Q

Which parts of Africa experience the lowest rainfall

A

Tropic of Cancer

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7
Q

What is potable water

A

Potable water is water that is safe to drink and used for cooking and washing

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8
Q

How many people do not have access to a reliable supply of fresh water

A

About 1 billion people

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9
Q

What are the three main factors relating to water influence where people settle

A
  1. Historical and Environmental Factors
  2. Agriculture
  3. Transport and Trade
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10
Q

What is Historical and Environmental Factors

A

Towns and cities are developed along rivers, or near lakes and other fresh water sources

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11
Q

What is agriculture

A

Communities relying on fresh water to grow crops and farm animals

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12
Q

Trade and Transport

A

Rivers, lakes and oceans are an act of transport, allowing products and people to move easily from one place to another

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13
Q

What are the two ways water can affect different people and places

A

Positively and Negatively

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14
Q

What is a positive way it can affect different people and places

A

It is used to irrigate the crops and farm the livestock that we eat. Without it no life could exist

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15
Q

What is a negative way it can affect different people and places

A

It can cause serious problems and damage in different places

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16
Q

What is the most dangerous type of flood

A

Flash flood is the most dangerous flood because it is fast and it has a massive amount of rain water

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17
Q

What is a king tide

A

A king tide is a tide that rises sea levels and creates high tides

18
Q

What is known as the amount of water needed to produce an item of food, or a piece of clothing

A

Virtual Water

19
Q

How much of Australia’s fresh water is used on farms (agriculture)

A

About 70 percent

20
Q

Can farmers use as much water as they want

A

Farmers are allowed to use a certain amount of water each year and are charged for the amount of water they use

21
Q

Which crop uses the most water

A

Rice

22
Q

Which crop uses the least water

A

Cotton

23
Q

Why does it take so much water to produce 1kg of rice

A

Because rice is grown in water and needs massive amounts to survive

24
Q

What relationship is shown between irrigation areas and rivers

A

All irrigation areas are near rivers for easy access

25
Q

What is Hydroelectric power

A

The power generated in the same way that easy watermills operated

26
Q

What is the main source of renewable energy

A

Hydroelectricity

27
Q

What are the advantages of building dams

A
  • They store water to be released in drought periods
  • Stored water provides a constant flow to turn turbines to create electricity
  • Dams prevent flooding downstream
  • Stored behind dams are forms of recreational purposes
28
Q

What are the disadvantages of dams

A
  • They often flood towns behind the dams and cause displacement on people
  • Dams prevent floods in the wet season causing in long term fertility being lost in downstream farms
  • Dams become full of silt washed down in the river
29
Q

When did we start relying on water

A

Since the beginning of human history

30
Q

What is our most precious resource

A

Water

31
Q

How much of the water consumed in Australia is used in our homes and gardens

A

Only 12%

32
Q

How much of the water consumed in Australia is used to irrigate farms

A

70% is used

33
Q

What is the worlds most important food crop

A

Rice as it is the main food source for over half of the worlds population

34
Q

Why is rice production heavily dependent on water

A

Water is the single most important component for sustainable rice production

35
Q

Where is the most of our rice grown

A

About 90% of the worlds rice is grown in Asia

36
Q

Which countries are the largest producers of rice

A

India and China

37
Q

Where is most of our fresh water on Earth

A

Most of our fresh water is in storage

38
Q

How long can fresh water be stored for

A
  • Fresh water can be stored for days or weeks in a lake for thousands of years underground or in an ice cap
39
Q

How much of the Earths water is found in the oceans and is too salty to drink

A

97.5% of the Earth’s water is found in the oceans and is too salty to drink

40
Q

How much of the Maths water is safe for us to drink

A
  • 2.5% is safe for us to drink and is in the polar ice caps and in flowing rivers of ice, known as glaciers

Geography (1 decks)

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