Podcast
Questions and Answers
What percentage of the Earth's surface is covered by oceans and seas?
What percentage of the Earth's surface is covered by oceans and seas?
- 70% (correct)
- 30%
- 90%
- 50%
The Pacific Ocean is the smallest ocean on Earth.
The Pacific Ocean is the smallest ocean on Earth.
False (B)
Name one way in which oceans serve as a food source for the world.
Name one way in which oceans serve as a food source for the world.
Fishing or aquaculture
Oceans have an average depth of around _________ meters.
Oceans have an average depth of around _________ meters.
Match the following features with their definitions:
Match the following features with their definitions:
Which ocean extends up to 60° South latitude?
Which ocean extends up to 60° South latitude?
Seas are generally deeper than oceans.
Seas are generally deeper than oceans.
What is a major threat facing oceans today?
What is a major threat facing oceans today?
Flashcards
Ocean vs. Sea
Ocean vs. Sea
Oceans are vast bodies of saltwater; seas are smaller bodies of saltwater, often located within or near oceans.
Pacific Ocean Size
Pacific Ocean Size
The largest ocean, covering approximately 45% of all ocean surface area.
Ocean Importance
Ocean Importance
Oceans support essential ecosystems and regulate the Earth's climate.
Ocean Depth
Ocean Depth
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Marine Biodiversity
Marine Biodiversity
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Ocean Currents
Ocean Currents
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Threats to Oceans
Threats to Oceans
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Ocean as Food Source
Ocean as Food Source
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Study Notes
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.
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