1.The ocean1 is made of ___ of all the water on Earth.a. 77%b. 87%c. 97%2.The ___ is the largest... in the oceans to cover all the land on the Earth, it will be ___ thick.a. 15 metersb. 150 metersc. 1,500 ……

你知道吗？1.How much of the water on Earth can be drunk (可饮用的)?a. 1% b. 10% c. 90%2.Which one can... _____ of water. That’s the amount (总量) of water a person drinks in his/her whole life. a. 200 tons (吨 ……

, and variations (变化) in the Earth's surface.WaterThe biggest bodies of water on Earth are the oceans, covering about 70 percent of Earth's surface. Millions of living things live in the oceans. Fresh water ……

, and variations (变化) in the Earth's surface.WaterThe biggest bodies of water on Earth are the oceans, covering about 70 percent of Earth's surface. Millions of living things live in the oceans. Fresh water ……

a water-saving (节水的) tap.4. Tell other people to save6 water.StepsAbout 70% of the Earth’s surface (地球表面) is covered by water. We’ll see how much of the Earth’s water is fresh. Fill the container ……

fire, water, earth, and air live together. They cannot mix with each other.The story takes place in the big Element (元素) City. Elements fire, water, earth, and air live together. They cannot mix ……

保护水资源，从我做起。
课件见网站OUR Earth is a blue planet. Why is it blue? It's because of the water. About 71 percent of the planet is water. But most of it you can't drink. The sea makes up two thirds of the Earth's water ……

of water on Earth.A. Because it can help solve the lack of water on Earth.B. Because it makes the idea... water inside the beads.A. They found water inside the beads.B. The beads have material that can ……

twice as much water as the Earth, according to NASA.The moon Europa consists (包含) of a core (核); a rock...THERE may be life in space. Scientists have discovered signs of water in lakes just below ……

自来水背后的真相。词数 300 建议阅读时间 6分钟 THOUGH water does not seem all that exciting, it is very valuable. The Ancient Greek people believed all the fresh water on the Earth came from a river called Okeanos ……

.WaterThe biggest bodies of water on Earth are the oceans, covering about 70 percent of Earth's surface... for animals, plants and humanity on the land. Water on the earth also plays a important role ……

into rivers and oceans.  Did you know?Did you know?Only 3 percent of water on Earth is fresh... of water on Earth is fresh, and about 70 percent of that is frozen (冰冻的). That’s 30 million ……

of water means life is possible. "In everything we know about life on Earth, there is no example without...器), Opportunity, succeeded in finding signs that water once existed on the planet. Opportunity ……

About 97% of Earth’s water is saltwater (盐水). ……

的) water on Earth’s neighboring planet (星球)! But you would not want to drink it. The water would... water, humans, plants and animals cannot live. NASA scientists have been studying Mars to see if humans ……