Ocean Exploration Quiz

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

• 98%

• 85%

• 71%

• 50%

Which of the following is NOT one of the five main oceans?

• Mediterranean

• Arctic

• Pacific

• Atlantic

What is the primary cause of ocean currents?

• Tides

• Earthquakes

• Wind

• Volcanic activity

How do warm ocean currents affect nearby land?

• They bring cold weather

• They have no effect

• They cause dry climates

• They bring warm weather and rain

What is the name of the shallowest part of the ocean floor?

• Ocean ridge

• Continental shelf

• Trench

• Ocean basin

What are deep cracks in the ocean floor called?

• Trenches

• Ridges

• Basins

• Shelves

Which ocean plants are the most numerous?

• Seagrass

• Seaweeds

• Corals

• Phytoplankton

Why do most ocean plants grow near the surface?

• They need sunlight

• They need oxygen

• They need warmth

• They need salt

What is the largest animal in the ocean?

• Great white shark

• Giant squid

• Blue whale

• Orca

What are the smallest animals in the ocean called?

• Starfish

• Zooplankton

• Krill

• Jellyfish