What percentage of the Earth's surface is covered by water?*A) 50%B) 60%C) 70%D) 80%

Breakdown of the Problem

1. Identify the total surface area of the Earth.
2. Determine the portion of that area covered by water.
3. Calculate the percentage of the Earth's surface covered by water.

Relevant Concepts

• The total surface area of the Earth is approximately 510 million square kilometers.
• About 71% of this surface is covered by water.

Analysis and Detail

1. Total surface area of the Earth = 510 million km².

2. Percentage of surface covered by water = $\frac{\text{Water Area}}{\text{Total Surface Area}} \times 100$.

3. Assuming 71% of the Earth's surface is water:

   $\text{Water Area} = 0.71 \times 510 \text{ million km}^2 = 362.1 \text{ million km}^2$

Verify and Summarize

• The calculation shows that approximately 71% of the Earth's surface is covered by water.
• The closest option to this percentage in the provided choices is C) 70%.

Final Answer

C) 70%