Test your knowledge for World Oceans Day!

Take a one minute quiz!

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* 1. The world's oceans are often divided into how many individual oceans?

Six

Seven

Five

Four

Eight

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* 2. Which ocean is the largest by surface area?

Pacific Ocean

Atlantic Ocean

Indian Ocean

Arctic Ocean

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* 3. What percentage of the Earth's surface is covered by oceans?

52%

65%

71%

80%

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* 4. What is the name of the deepest known point in the Earth's oceans?

Mariana Trench

Tonga Trench

Java Trench

Puerto Rico Trench

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* 5. Which ocean is known for having the 'Great Barrier Reef'?

Indian Ocean

Pacific Ocean

Atlantic Ocean

Southern Ocean

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* 6. What causes ocean tides?

Wind

Sun's gravity

Moon's gravity

Earth's rotation

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* 7. Which of these are common threats to ocean ecosystems? Select all that apply.

Overfishing

Plastic pollution

Coral bleaching

Ocean acidification

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* 8. Which important ocean animal helps protect kelp forests by eating invasive purple sea urchins?

Seal

Jellyfish

Sea otter

Seahorse

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* 9. What does the term anthropogenic mean?

Giving human emotions or behaviors to animals or objects

The movement of nutrients and gases through the ocean

The process of oceans becoming more acidic

Environmental changes or pollution caused by human activities

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