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Ocean Exploration Fun Facts

Oceanography

A collection of easy, factual questions about the ocean, perfect for young learners.

ocean marine science geography animals water

12 Questions Easy Ages 9+ Apr 22, 2026

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About this Study Set

This study set covers Oceanography through 12 practice questions. A collection of easy, factual questions about the ocean, perfect for young learners. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

Questions & Answers

Browse all 12 questions from the Ocean Exploration Fun Facts study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 What percentage of the Earth's surface is covered by oceans?

A About 25%
B About 50%
C About 71%
D About 90%

2 Which is the largest ocean on Earth?

A Atlantic Ocean
B Indian Ocean
C Arctic Ocean
D Pacific Ocean

3 What is the deepest known part of the ocean called?

A The Great Barrier Reef
B The Mariana Trench
C The Atlantic Ridge
D The Dead Sea

4 What makes ocean water salty?

A Underwater volcanoes
B Rivers carrying minerals
C Rainfall
D Fish waste

5 What is a large body of saltwater that is surrounded by land called?

A A river
B A lake
C A gulf
D A sea

6 What do we call the up and down movement of the ocean's surface?

A Currents
B Tides
C Waves
D Storms

7 Which of these is a plant that lives in the ocean?

A Coral
B Jellyfish
C Seaweed
D Starfish

8 What is the name for a large system of ocean water that moves in a certain direction?

A A wave
B A tide
C A current
D A whirlpool

9 What causes tides in the ocean?

A The wind blowing
B The sun and the moon's gravity
C Underwater earthquakes
D The Earth's rotation alone

10 What is the biggest animal that lives in the ocean?

A Great White Shark
B Giant Squid
C Blue Whale
D Humpback Whale

11 What do we call a large underwater mountain range?

A A canyon
B A plateau
C An abyssal plain
D A mid-ocean ridge

12 What is the largest living structure on Earth, found in the ocean?

A A kelp forest
B A coral reef
C A mangrove swamp
D A sand dune

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