Home / Exams / CDS / CDS_I_2015 / Question
CDS · 2015 Geography › Oceanography
Statement I : Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and Sun, and the rotation of the Earth. Statement II : Earth rotates from the West towards the East in 24 hours with respect to the Sun.
🔎 The pattern behind this question
This is the same idea UPSC keeps returning to. Start a free trial to see the answer and the full map.
Across examsCSE 5 · CAPF 4 · CDS 3 · NDA 3 · CISF 1 · ESE 1 · CBI 1
Evolution“Tides” tested across 12 years (1999–2026)

Study how UPSC repeats — not just the papers

₹199 / 1 year · Founding Member

Full access unlocks the three things no PYQ PDF gives you:
① Cross-exam learning — see the same idea recur across CSE, CAPF, CDS and NDA.
② Topic evolution — how each idea is framed, year by year.
③ Question intelligence — every PYQ + answer, linked to related concepts and similar questions.

e.g. Round Table Conference: CDS 2017 → CSE 2017 → … → CAPF 2024

15 days free, no card required — then ₹199 for 1 year.

Start your 15-day free trial →
💬 Feedback

Send feedback