Oceans and Seas Overview

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

The Pacific Ocean is the smallest ocean on Earth.

Name one way in which oceans serve as a food source for the world.

Oceans have an average depth of around _________ meters.

Match the following features with their definitions:

Which ocean extends up to 60° South latitude?

Seas are generally deeper than oceans.

What is a major threat facing oceans today?

Oceans and Seas

Oceans and seas cover more than 70% of Earth's surface, containing 97% of its water.
They have crucial environmental roles, supporting ecosystems and influencing climate.
Oceans are larger bodies of saltwater, with average depths of around 3,700 meters (12,000 feet) or more.
Oceans have a greater diversity of marine life than seas, including fish, mammals, reptiles, and other aquatic animals.
Seas are smaller bodies of saltwater, located within or near oceans.
Seas tend to have average depths less than 1,000 meters (3,300 feet).
Seas typically have fewer marine species, such as fish, crabs, lobsters, shrimps, and shellfish..

The Pacific Ocean

The Pacific Ocean is the largest ocean, covering approximately 45% of the total ocean surface area.
Its area is over 165 million km².
Its boundaries encompass North and South America, East Asia, Australia, and the Southern Ocean (at 60° South latitude).
It contains diverse islands, from Polynesian atolls to larger landmasses such as Japan and New Zealand.

Explore the fascinating characteristics of oceans and seas, including their size, depth, and biodiversity. Learn about the unique features of the Pacific Ocean, the largest ocean on Earth. This quiz covers key aspects of marine ecosystems and their environmental roles.