Question 15 of 18intermediate✨ CreateDiagram3 marks

Draw a graph to show the daily mean maximum, the daily mean minimum and the mean temperature.

Correct Answer

To draw the graph showing daily mean maximum, daily mean minimum, and mean temperature, follow these steps:

Step 1: Prepare the Data Table Tabulate the temperature data from the observatory. For example, using New Delhi (Safdarjung) data:

  • January: Mean Daily Max = 21.1°C, Mean Daily Min = 7.3°C
  • May: Mean Daily Max = 39.6°C, Mean Daily Min = 25.9°C

Step 2: Calculate Mean Temperature Calculate the daily mean monthly temperature using the formula:

  • January: (21.1 + 7.3) ÷ 2 = 14.2°C
  • May: (39.6 + 25.9) ÷ 2 = 32.75°C

Step 3: Draw the Graph

  1. Draw the X-axis representing months (January to December)
  2. Draw the Y-axis representing temperature in °C
  3. Plot three distinct lines using different colors:
    • Line 1: Daily Mean Maximum Temperature (highest values)
    • Line 2: Daily Mean Minimum Temperature (lowest values)
    • Line 3: Mean Temperature (middle line, calculated average)
  4. Add a legend to identify each line
  5. Label the axes and give the graph a title

The graph will show the annual temperature variation with the maximum line at the top, minimum line at the bottom, and mean temperature line in between.

Exercise: Project Work | Q: Project Work (iv) | (Page Page 8)
For More Understanding

Explanation

This question tests the student's ability to represent temperature data graphically. The textbook provides the example of New Delhi (Safdarjung) with calculations for January and May. Students should plot all 12 months' data on the X-axis against temperature on the Y-axis. The three lines will clearly show the temperature pattern throughout the year, with the gap between max and min lines representing the daily range of temperature.

Solution Steps

  1. Step 1: Tabulate monthly temperature data from the observatory

  2. Step 2: Calculate mean temperature for each month using (Max + Min) ÷ 2

  3. Step 3: Draw axes with months on X-axis and temperature on Y-axis

  4. Step 4: Plot three lines for Max, Min, and Mean temperatures

  5. Step 5: Add legend, labels, and title to complete the graph

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