How Much Water Is on Earth?
NASA Space Place · NASA (공공저작물)
미국 항공우주국이 어린이를 위해 쓴 지구 · 태양 · 태양계 과학 글 모음입니다. 미국 연방정부 저작물이라 자유롭게 읽을 수 있습니다.
출처 NASA Space Place, "How Much Water Is on Earth?" · 원문
이 장은 원문만 있습니다. 문장별 해석은 앞 장부터 차례로 붙입니다.
Click here to download this video (1920x1080, 37 MB, video/mp4).
How much water is on Earth?
Earth has a lot of water. It's one of the things that makes our big, blue planet so special. Learn more about Earth's water in this video!
This poster summarizes the video and makes a great wall decoration!
Click here to read a transcript of this video
How much water is on Earth?
Earth is special because it has so much water. It’s in the ground, forms big oceans, and it’s in our atmosphere.
It’s also in living things. Your body is made up mostly of water.
Water covers 71 percent of Earth’s surface. And almost all of it—96.5 percent—is salt water.
Salt water has different kinds of salt in it, but it mostly has sodium chloride, the same salt we add to our food.
Just 3.5 percent of the water on Earth is fresh water we can drink. And most of that fresh water, 68 percent, is trapped in ice and glaciers.
A third of the fresh water is in the ground. We call it groundwater. The last two percent of fresh water is in the rivers, lakes, and streams.
A very small amount is in our atmosphere, where it exists as water vapor. That’s what clouds are made of.
If you took all the water on Earth and put it together it would be a ball 860 miles wide. That’s a lot of water!
Related Resources for Educators
Our World: ICESat-2 - What Is Ice? Our World: Why Are Oceans Salty? Real World: Global Cloud Observation Day
More about Earth
Make an Earth fan!
Why is thesky blue?
If you liked this, you may like:
이 글은 위 출처의 공개 글을 그 라이선스에 따라 옮겼습니다. 해석 · 끊어 읽기 · 낱말 풀이와 이해 확인 문항은 따로 덧붙인 것입니다.