Sponsored by: By choosing to build from a pre-drawn plan â as opposed to hiring a residential architect to create a custom home â you've already taken a big step toward building a great home at the right price. But not all pre-drawn plans cost the same to build. You can still keep costs down and have a beautiful home by keeping several principles in mind. First, and most obviously, a larger home costs more to build and more to heat, cool, and maintain. That's why you'll find many smaller homes in this collection.
Water covers 71% of the Earth's surface; the oceans contain 96.5% of the Earth's water. The Antarctic ice sheet, which contains 61% of all fresh water on Earth, is visible at the bottom. Condensed atmospheric water can be seen as clouds, contributing to the Earth's albedo.
But how much of Earth is waterâhow much water contributes to the actual mass of the planet? This includes not just the surface of the Earth, but inside as well. Scientists calculate that the total mass of the oceans on Earth is 1.35 x 1018 metric tonnes, which is 1/4400 the total mass of the Earth. In other words, while the oceans cover 71% of the Earth's surface, they only account for 0.02% of our planet's total mass.