Seasons

सारांश

Seasons are recurring annual changes in temperature and daylight caused mainly by Earth's axial tilt and revolution.

मूल विचार

प्रणाली को समझें

Seasons are recurring annual changes in temperature and daylight caused mainly by Earth's axial tilt and revolution.

क्यों और कैसे होता है

कारण और संदर्भ

Seasons occur because Earth's axis is tilted about 23.5° and maintains its orientation while Earth revolves around the Sun. The tilt changes both solar altitude and daylight duration, so each hemisphere receives different insolation through the year.

यह कैसे काम करता है

First, Earth's tilted axis maintains near-parallel orientation during revolution. Next, the subsolar point migrates between the Tropic of Cancer and Tropic of Capricorn. Then solar altitude and day length change by latitude, producing solstices, equinoxes and opposite hemispheric seasons.

मुख्य तथ्य

• Equinoxes have nearly equal day and night globally.
• Solstices mark maximum seasonal solar declination: about 23.5°N or 23.5°S.
• The Northern and Southern Hemispheres have opposite seasons.

ज़रूरी शब्द

• solstice
• equinox
• solar declination
• insolation
• tropic

स्थापित आँकड़े

• Solstices mark maximum seasonal solar declination: about 23.5°N or 23.5°S.

उदाहरण और केस स्टडी

• The June solstice brings the Sun overhead at the Tropic of Cancer.

कारण और घटक

• Earth's approximately 23.5° axial tilt.
• Earth's annual revolution around the Sun.
• The changing angle and duration of incoming solar radiation.

प्रभाव और महत्व

• Solstices mark maximum solar declination and seasonal contrast.
• Equinoxes produce nearly equal day and night globally.
• Opposite seasons occur in opposite hemispheres.

भूगोल से जुड़ाव

The June solstice brings the Sun overhead at the Tropic of Cancer. This illustrates how seasons varies by location, scale or environmental context.

बांग्लादेश से जुड़ाव

At about 23.5°N, the June solstice is especially relevant to Bangladesh's high summer solar altitude and monsoon context.

BCS प्रारंभिक के तथ्य

• Equinoxes have nearly equal day and night globally.
• Solstices mark maximum seasonal solar declination: about 23.5°N or 23.5°S.
• The Northern and Southern Hemispheres have opposite seasons.

BCS लिखित विश्लेषण

एक विश्लेषणात्मक उत्तर बनाएँ

• Show the cause-effect chain from axial tilt to changing insolation, temperature and day length.
• Contrast solstice and equinox conditions using the tropics and polar circles.
• Relate Bangladesh's pre-monsoon and monsoon seasonality to solar geometry without claiming tilt alone causes rainfall.

आम गलतफ़हमियाँ

• Seasons are not caused by changing Earth-Sun distance.
• The Equator does not have four temperate seasons like mid-latitudes.

झटपट दोहराव

• Seasons
• Equinoxes have nearly equal day and night globally.
• Solstices mark maximum seasonal solar declination: about 23.5°N or 23.5°S.
• solstice / equinox
• Definition → process → spatial example