CAIE IGCSE Physics 6.1.1.2 Earth orbits the Sun once in
Practise using Earth’s yearly orbit and tilted axis to explain seasons, daylight changes and the 365 day period around the Sun.
- Syllabus
- 2026–2028
- Course
- Physics 0625
Exam points
- choose 365 days as Earth’s orbital period from tables comparing Earth and Moon motion
- explain seasonal temperature variation using Sun-ray angle or daylight duration
- distinguish tilt-based season explanations from incorrect distance-from-Sun claims
6.1.1.2—Earth orbits the Sun once in question 1
Fig. 10.1 shows the path of the Earth as it orbits the Sun. X is a position on the Earth where scientists observe the apparent motion of the Sun throughout the year.
Fig. 10.1
Question (a)
(a)
Determine how many days it takes the Earth to move around its orbit from F to G . Explain your answer.
number of days =
explanation
[ 2 ]
Question (b)
(b)
Fig. 10.1 shows four positions E, F, G and H of the Earth in its orbit of the Sun.
[ 2 ]
Question (i)
(i)
Identify the position of the Earth when it is summer at X .
[ 1 ]
Question (ii)
(ii)
Identify the position of the Earth when it is winter at X .
[ 1 ]
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