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Download 8th Class Geography Notes (Unit-1) for Islamabad Model Schools and Colleges

Download 8th Class Geography Notes (Unit-1) for Islamabad Model Schools and Colleges

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Download 8th Class Geography Notes (Unit-1) for Islamabad Model Schools and Colleges

SHORT QUESTIONS

What method of making maps suits showing population density of an area?
Shade Method suits showing population density of an area.

What is the use of Choropleth method in drawing maps?
·        It is used to show distribution, in general, over a specified area.
·        Its data relates to physical phenomena such as climate, or human characteristics such as population density.
·        This method is based on the use of different shades of the same colour.
·        Low range is given light shade and high range gets dark shade.

Describe the first step for drawing a Pie Graph.
·        We know there are 360° in a circle.
·        In order to show proportional divisions for each continent, we divide the total area among 360° of the circle.
    360
·        Angle for continent  =      -----------   x Area of Continent
Total Area

What is the use of a Bar Graph?
·        A Bar Graph is usually drawn to depict quantities over intervals of time.
·        Bar graph is useful to show comparison between different items, or variations of the same item, over different intervals of time. i.e. depicting rainfall at a place.

LONG QUESTIONS

Define Distribution Maps and give their uses of for any two purposes.
·        A Distribution Map shows distribution of a commodity, product or occurrence over a specified area.
Uses of Distribution Maps:
·        Distribution maps are useful for general assessment of an area.
·        Such maps sometime give comparisons between areas.
·        More importantly Distribution Maps are useful for geographic studies like cause and effect of an incidence.
·        One simple example from our areas is distribution of rainfall in summer months and occurrence of malaria in a district.

Write about use of the Dot Method in making Distribution Maps.
·        Dot method is a much simple method of showing distribution of commodities and products in a given area.
·        The outcome of this method gives us a Dot Map that displays distribution of a commodity or product as per its geographic location.
·        A map showing towns and cities of a country is simply a dot map


Write the procedure to draw a Line Graph.
A Line Graph showing average monthly maximum temperature and minimum temperature of Islamabad is drawn as an example below:
  • Demarcate 12 months along X-axis.
  • Fix a scale for monthly temperature along Y-axis.
  • In order to show the highest temperature, we need a provision of below 50°C.
  • Accordingly choose a scale 1 cm = 5°C.
  • As per this scale, plot points of maximum temperature for each month.
  • Joining the 12 points, we get a line that indicates rise and fall in average monthly maximum temperature of Islamabad.
  • Now for minimum temperature we repeat above steps.

Briefly highlight the use of Choropleth Method in making maps.
·        It is used to show distribution, in general, over a specified area.
·        Its data relates to physical phenomena such as climate, or human characteristics such as population density.
·        This method is based on the use of different shades of the same colour.
·        Low range is given light shade and high range gets dark shade.

Write merits and demerits of three types of graphs.
·        Line Graph is the most commonly used diagram. A rise and fall of a Line is a good indication of fluctuations over a given period.
·        A Bar Graph is drawn to depict quantities of Production, Population Trade etc. Bar Graph is useful for showing comparisons between different years or different items for the same year.

·        A pie Graph is better used for showing proportional values of an important item. It may include Area, Population, Production or Trade. It may be used to  compare a single item for different years, or from different countries.

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Download Class Notes: Download 8th Class Geography Notes (Unit-1) for Islamabad Model Schools and Colleges
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