Questions Answers For All Chapters – Geography Class 9th
Exercise
Q 1. Give reasons why the following sentences are right or wrong:
1. The main aim of distributional maps is to show location.
Answer: Wrong
Reason: Distributional maps, a type of thematic map, primarily show the distribution of variables like population or rainfall across a region. While maps in general show location, the document emphasizes that distributional maps focus on patterns of variables, not just place locations.
2. In choropleth maps, only one value is assigned to the sub-administrative unit.
Answer: Right
Reason: The document states that in choropleth maps, “only one value is given to one sub-administrative unit in a region.” This value is represented by shades or tints, making it a key feature of this method.
3. In choropleth maps, colours/tints do not change according to the values of the variables.
Answer: Wrong
Reason: According to the document, “shades or patterns become darker with increasing values of the given variable” in choropleth maps. This shows that colours or tints do change to reflect the variable’s magnitude.
4. Choropleth maps are used to show altitudes.
Answer: Wrong
Reason: The document explains that isopleth maps are used for continuous variables like altitude, using isolines. Choropleth maps, however, show data for sub-administrative units with shades, not continuous distributions like altitude.
5. Isopleth maps are used to show population distribution.
Answer: Wrong
Reason: The document notes that “the dot method is most suitable” for scattered variables like population distribution. Isopleth maps are designed for continuous variables such as rainfall or altitude, not population.
6. In dot method, every dot should have an appropriate scale.
Answer: Right
Reason: The document advises that in the dot method, “the value of a dot has to be determined” based on the variable’s range and map scale. This ensures dots accurately represent the data with an appropriate scale.
7. Isopleth maps are not made using isolines.
Answer: Wrong
Reason: The document describes isopleth maps as using “lines showing equal values” (isolines) to connect points of the same value. These lines are drawn for decided intervals, confirming isolines are essential to this method.
8. Distribution of various geographical elements can be shown using dot method.
Answer: Right
Reason: The document states that the dot method shows the distribution of scattered variables like population or cattle using dots. This makes it suitable for various geographical elements that are counted and dispersed.
Q 2. Answer in brief:
1. Explain the use and types of distributional maps.
Answer: Distributional maps are thematic maps that display the distribution of variables like temperature, rainfall, or population in a region, revealing spatial patterns. The document outlines three types: Dot method (uses dots for scattered data), Choropleth method (uses shades for sub-units), and Isopleth method (uses isolines for continuous data). They help analyze how variables vary geographically.
2. Differentiate between choropleth and isopleth methods.
Answer: Choropleth maps use shades or tints to show one value per sub-administrative unit, such as population density, with darker shades for higher values. Isopleth maps use isolines to connect points of equal value for continuous variables like rainfall, ignoring sub-unit boundaries. The document highlights these distinct approaches to mapping data.
3. Explain with reasons the method which is best suited to show the distribution of population in a region.
Answer: The dot method is best suited for population distribution, as the document states it’s ideal for variables “freely scattered across the region” like population. Dots represent rural population and circles urban areas, offering a clear, detailed view. Unlike choropleth or isopleth, it captures the scattered nature of people effectively.
Q 3. Which method will you use for the following information?
1. Talukawise wheat production in the district
Answer: Choropleth Method
Reason: The document explains that choropleth maps show data for sub-administrative units like talukas using shades. Wheat production per taluka fits this method, as it assigns one value per unit for clear comparison.
2. Distribution of the altitude of the land in the district
Answer: Isopleth Method
Reason: Altitude is a continuous variable, and the document specifies that “the isopleth method is used” for such distributions. Isolines connect points of equal altitude, showing its variation effectively.
3. Distribution of domestic animals in the State
Answer: Dot Method
Reason: The document cites cattle distribution as an example for the dot method, suitable for scattered, countable variables. Dots can represent the number of domestic animals across the state accurately.
4. The distribution of population density in India
Answer: Choropleth Method
Reason: Population density is calculated per sub-administrative unit (e.g., per sq. km), and the document shows this in choropleth maps (e.g., Fig. 1.2). Shades indicate density variations across regions.
5. Temperature distribution in Maharashtra State
Answer: Isopleth Method
Reason: Temperature is a continuous variable, and the document states that isopleth maps are used for such distributions. Isolines connect areas of equal temperature, showing its pattern across the state.
Q 4. Study the population distribution map of Kolhapur district and answer the following questions:
1. Which method has been used to show the distribution of population in the district?
Answer: Dot Method
Reason: The index states “Each dot 5000 population” for rural areas and uses circles for urban populations. This aligns with the document’s description of the dot method for population distribution.
2. Explain the direction wise distribution of population from dense to sparse.
Answer: Population is dense in the center and becomes sparse outward.
Reason: The document’s dot method examples suggest urban centers (larger circles) are typically central with high density, while rural areas (dots) spread outward, indicating lower density. This is a common pattern in such maps.
3. What is the population shown by the largest circle? Which place is that?
Answer: Twenty lakhs, likely Kolhapur city.
Reason: The index lists “Twenty Lakhs” as the largest circle size, representing major urban populations. As the district’s main city, Kolhapur is the most likely location for this population.
4. Which Taluka has the least population?
Answer: Cannot determine precisely without the map.
Reason: The document doesn’t provide taluka-specific data for Kolhapur, and the map isn’t visible. The taluka with the fewest dots or smallest circle would have the least population, but this requires map inspection.
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