Question A. Where am I?
(1) The isotherm 0°C runs in my surroundings.
(2) The mean annual temperature is 25°C around me.
(3) The mean annual temperature around me is 10°C.
Answer :
I am in temparate region.
Question B. Who am I?
(1) I connect places of equal temperature.
(2) I am useful for measuring the correct temperature.
(3) I get heated due to the land or water near me.
(4) Land and water get heated due to me.
Question C. Answer the following.
(1) Explain with a diagram, the effect of the spherical shape of the earth on the temperature at different latitudes.
Answer :
- Due to the spherical shape of the earth and the resultant curvature of the surface, the sunrays occupy a larger or less area on the surface of the earth. This leads to unequal distribution of the heat received from the sun.
- Between 0° and 23°30‘ North and South, the sunrays are perpendicular. As its effect, this area receives bright sunlight and greater heat. Therefore, this area is known as torrid zone.
- Between 23°30‘ and 66°30‘ North and South, the sunrays are slanting. As its effect, these areas receive less bright sunlight and less heat. Therefore, these areas are known as temperate zones.
- Between 66°30‘ and 90° North and South, the sunrays are extremely slanting. As its effect, these areas receive extremely less bright sunlight and extremely less heat. Therefore, these areas are known as frigid zones.
(2) What is the relation between the latitudinal extent and temperature of a region?
Answer :
- Areas between 0° and 23°30‘ North and South, receives bright sunlight and greater heat. This area is known as torrid zone.
- Areas between 23°30‘ and 66°30‘ North and South, receive less bright sunlight and less heat. This area is known as temperate zones.
- Areas between 66°30‘ and 90° North and South, receive extremely less bright sunlight and extremely less heat. This area is known as frigid zones.
(3) What makes the isotherms run zigzag over continental areas?
Answer :
- Temperatures of continental areas vary as per their height from the sea level, As one moves higher up from the surface of continental areas, the temperature of the air
- Due to difference in the height of the continental areas, the distance between the isotherms varies.
- Vegetation cover, urbanization, industrialization also leads to diversity in the distribution of temperature. Thus, these factors also make the isotherms run zigzag over continental areas.