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Unit notes and practice questions

Grade 9 Geography unit 6: Human - natural environment interactions in Ethiopia

Everything here is for unit 6 of the Grade 9 Geography textbook: what the chapter covers, the short notes, practice questions with their answers, and the lesson video where one exists.

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3
Cards
10
Practice questions on unit 6
161–185
The textbook pages for unit 6

What unit 6 covers

  1. 1.Human-environment relationship
  2. 2.Optimum population and resource use
  3. 3.Over population and resource use
  4. 4.Under population and resource use
  5. 5.Impacts of rapid population growth

Short notes for unit 6

The cards filed under this chapter on the Grade 9 Geography page. Open one at a time.

Interaction ModeDefinitionExample
DependenceRelying on environmental resources for basic survivalAir, water, food, and shelter
ModificationChanging physical surroundings to meet human needsClearing forests for farming, building settlements
AdaptationAdjusting human lifestyles to fit environmental conditionsChanging clothing for weather, dwelling in harsh climates

When you use it

Use to classify how humans relate to and interact with their physical environment.

Watch out

Do not confuse adaptation (adjusting behavior to nature) with modification (physically altering nature).

Drafted from Grade 9 Geography, pages 161-185, then checked twice before it went up

Population StateResource RelationshipMain Characteristic
Optimum PopulationResources balance population needs with available technologyHighest per capita income and living standards
OverpopulationPopulation exceeds utilized or potential resourcesResource depletion, poverty, and environmental degradation
UnderpopulationPopulation is too small to fully exploit available resourcesResource surplus, labor shortages, and underutilized potential

When you use it

Use to distinguish between optimum population, overpopulation, and underpopulation based on resource availability.

Watch out

Overpopulation is not defined purely by high density. It occurs when numbers exceed the carrying capacity of available resources and technology.

Drafted from Grade 9 Geography, pages 161-185, then checked twice before it went up

CategoryAnnual Freshwater Availability per Capita
Water stress<1700 m3< 1700\text{ m}^3 per person per year
Water scarcity<1000 m3< 1000\text{ m}^3 per person per year

When you use it

Use to identify international classification thresholds for per capita water availability.

Watch out

Water stress applies below 1700 m^3 per person per year, while water scarcity is the more severe threshold below 1000 m^3.

Drafted from Grade 9 Geography, pages 161-185, then checked twice before it went up

Practice questions on unit 6

10 multiple-choice questions written against this chapter, each with its answer and the reason. Try one before you open the answer.

Question 1

According to the textbook, what are the three main modes of interaction between human beings and the environment?

  1. A.Dependence, modification, and adaptation
  2. B.Extraction, trade, and industrialization
  3. C.Deforestation, pollution, and degradation
  4. D.Urbanization, overpopulation, and migration
Show the answer and why

Answer: A Dependence, modification, and adaptation

Why

The relationship between humans and the environment is expressed in three ways: dependence (relying on nature for basic needs), modification (changing nature to build settlements or farms), and adaptation (adjusting lifestyles to fit different environments).

Question 2

Which sector withdraws and consumes the largest proportion of freshwater globally?

  1. A.Domestic sector
  2. B.Agricultural sector
  3. C.Industrial manufacturing
  4. D.Mining and energy generation
Show the answer and why

Answer: B Agricultural sector

Why

Globally, agriculture (principally irrigation) is the largest user of water compared to domestic and industrial sectors.

Question 3

What is meant by the concept of optimum population?

  1. A.When a population is too small to harvest existing natural resources
  2. B.When the number of people exceeds the available food supply
  3. C.When available resources equal population needs, yielding the highest quality of life
  4. D.When a country experiences rapid population decline and closed borders
Show the answer and why

Answer: C When available resources equal population needs, yielding the highest quality of life

Why

An optimum population exists when the amount of resources available in a country matches the population needs, providing the highest income per capita and highest living standards.

Question 4

What is the most important source of renewable energy currently harnessed to generate electricity in Ethiopia?

  1. A.Solar energy
  2. B.Water (hydroelectric power)
  3. C.Wind power
  4. D.Geothermal power
Show the answer and why

Answer: B Water (hydroelectric power)

Why

Water is the most important renewable energy source in Ethiopia, developed through several hydroelectric power stations including the Grand Ethiopian Renaissance Dam.

Question 5

A country is classified as water stressed when its annual freshwater availability falls below which threshold per person?

  1. A.1,000 m<sup>3</sup>
  2. B.1,700 m<sup>3</sup>
  3. C.2,500 m<sup>3</sup>
  4. D.3,000 m<sup>3</sup>
Show the answer and why

Answer: B 1,700 m<sup>3</sup>

Why

Countries with less than 1,700 m3 of water per person per year are defined as water stressed, while those with less than 1,000 m3 are defined as water scarce.

Question 6

At the national level in Ethiopia, what percentage of total domestic energy consumption is supplied by biomass energy?

  1. A.About 50%
  2. B.About 75%
  3. C.Over 99%
  4. D.About 25%
Show the answer and why

Answer: C Over 99%

Why

According to the textbook, biomass energy accounts for over 99% of total domestic energy consumption in Ethiopia (92% for households and the rest for small enterprises).

Question 7

What is the estimated current annual loss of high forests in Ethiopia?

  1. A.10,000 to 25,000 hectares
  2. B.50,000 to 80,000 hectares
  3. C.150,000 to 200,000 hectares
  4. D.500,000 to 750,000 hectares
Show the answer and why

Answer: C 150,000 to 200,000 hectares

Why

The textbook states that the current annual loss of high forests in Ethiopia is estimated at 150,000 to 200,000 hectares.

Question 8

Which statement correctly describes relative overpopulation?

  1. A.The absolute limit of production has been reached and no more can be produced
  2. B.Present production is inadequate for the population, although greater production is feasible
  3. C.The population is too small to exploit vast available resources
  4. D.All available land is fully mechanized and there is a shortage of farm workers
Show the answer and why

Answer: B Present production is inadequate for the population, although greater production is feasible

Why

Relative overpopulation occurs when current production does not meet the needs of the population, even though it is technically possible to increase production.

Question 9

Of the total biomass energy consumed in Ethiopia, what percentage is derived specifically from woody biomass?

  1. A.About 12%
  2. B.About 50%
  3. C.About 78%
  4. D.About 92%
Show the answer and why

Answer: C About 78%

Why

Of the biomass energy used in Ethiopia, about 78% comes from woody biomass, 12% from animal dung, and 9% from crop residues.

Question 10

According to historical estimates presented in the textbook, what percentage of Ethiopia was covered by high forests in the early 1950s?

  1. A.2.7%
  2. B.3.6%
  3. C.7.0%
  4. D.16.0%
Show the answer and why

Answer: D 16.0%

Why

High forests covered 16% of Ethiopia in the early 1950s, which dropped to 3.6% in the early 1980s and 2.7% by 1989.

The app holds 12 questions on this unit, marked as you go. These are the first 10.

The textbook pages for unit 6

Unit 6 runs from page 161 to page 185 of the Ministry of Education edition.

Ministry of Education edition, English, 247 pages

Download the PDF

All Grade 9 Geography short notes

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