Ocean Science
1 / 15Dive into the science of oceanography, currents, and marine phenomena
15 quick questionsNo sign-upFree to playTap an answer below to begin ↓
What percentage of Earth's surface is covered by oceans?
About Ocean Science
Dive into the science of oceanography, currents, and marine phenomena Ocean Science packs 15 multiple-choice questions aimed at mixed difficulty into a relaxed session of roughly 7 minutes — no sign-up, no timer pressure. An explanation appears after every answer, and finishing once a day keeps your streak alive.
A few sample questions
1. What percentage of Earth's surface is covered by oceans?
Answer: About 71%
2. What is the deepest known point in the ocean?
Answer: Mariana Trench
3. What causes ocean tides?
Answer: Gravitational pull of the Moon and Sun
4. What is the name of the global system of interconnected ocean currents sometimes called the 'ocean conveyor belt'?
Answer: Thermohaline circulation
5. What process causes the ocean to absorb carbon dioxide from the atmosphere?
Answer: Ocean carbon sink
Frequently asked questions
Is Ocean Science free to play?
Yes. The entire SeniorBrainGames catalog — including Ocean Science — is free, with no sign-up required, no time limits, and no ads on top of the game. It also works offline once the page has loaded once.
How long does Ocean Science take?
Most players finish Ocean Science in about 7 minutes. You can pause between questions, replay it as often as you like, and there is no penalty for taking your time — answers are explained after you submit them.
What's a good follow-up after Ocean Science?
If you enjoyed this general knowledge quiz, try the Daily Challenge — five rotating questions, refreshed every 24 hours, that count toward your streak. You can also use the Surprise Me button on the homepage to land on a different game type for variety.
Can I print Ocean Science?
Yes — use the Print button at the top of the page for a clean question sheet, or "Print with Answers" to make an answer key. Printed sheets work well for group play at home, in a classroom, or at a senior center.
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