Study the diagram below showing the four positions of the earth during revolution round the sun. State the dates lettered A to D and the seasons numbered i to iv. Briefly describe TWO proofs to show t

Here is the answer to question 2:

2. (a) Study the diagram below showing the four positions of the earth during revolution round the sun.

(i) State:

• The dates lettered A to D:

  • A: 21st June
  • B: 23rd September
  • C: 22nd December
  • D: 21st March

• The seasons numbered i to iv:

  • i: Summer Solstice
  • ii: Autumn Equinox
  • iii: Winter Solstice
  • iv: Spring Equinox

(ii) Briefly describe TWO proofs to show that the earth revolves round the sun.

1. Changing Seasons: The Earth's axis is tilted at an angle of approximately $23.5^\circ$ relative to its orbital plane. As the Earth revolves around the Sun, this tilt causes different hemispheres to receive more direct sunlight at different times of the year, leading to the distinct cycle of seasons.
2. Apparent Movement of Constellations: As the Earth orbits the Sun, our position in space changes throughout the year. This change in vantage point causes different constellations to be visible in the night sky at different times, as the Sun's position relative to the background stars shifts.