Introduction:
The statement that oceans contain 71% of water is true. This means that approximately 71% of the Earth's surface is covered by oceans. Let's delve into the details to better understand this fact.

Explanation:
The Earth's Surface:
The Earth's surface is primarily composed of landmasses and water bodies. The landmasses consist of continents, islands, and various other landforms, while the water bodies include oceans, seas, lakes, rivers, and other smaller bodies of water.

Oceans:
Oceans are vast bodies of saltwater that cover most of the Earth's surface. There are five recognized oceans on our planet: the Pacific Ocean, Atlantic Ocean, Indian Ocean, Southern Ocean, and Arctic Ocean. These oceans are interconnected and play a crucial role in regulating the Earth's climate, providing habitats for countless marine species, and influencing weather patterns.

The Percentage of Water in Oceans:
According to scientific research and measurements, the oceans cover about 71% of the Earth's surface. This means that the majority of the planet is comprised of water rather than land. The exact percentage may vary slightly depending on the method of measurement and other factors, but it is generally accepted that oceans account for around 71% of the Earth's surface.

Importance of Oceans:
The oceans are vital for various reasons:

1. Climate Regulation: Oceans absorb a significant amount of solar radiation and act as a heat sink, regulating global temperatures.

2. Marine Life: Oceans are home to an incredible diversity of marine species, providing habitats and supporting complex ecosystems.

3. Oxygen Production: Phytoplankton, microscopic plants found in the oceans, are responsible for producing a significant portion of the Earth's oxygen through photosynthesis.

4. Transportation and Trade: Oceans serve as major transportation routes, facilitating international trade and connecting different regions of the world.

5. Weather Patterns: Oceans influence weather patterns by transferring heat energy and moisture to the atmosphere, affecting rainfall, wind patterns, and the distribution of heat across the planet.

Conclusion:
In conclusion, the statement that oceans contain 71% of water is true. Oceans cover a significant portion of the Earth's surface and play a vital role in the planet's climate, biodiversity, and overall functioning. Understanding the importance of oceans is crucial for appreciating and conserving these invaluable ecosystems.