Can you find these words about Earth Day? ……

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

神奇的植物Plants make Earth beautiful. But how do they grow, and why are they all so different? Learn more about them inside. (A9-A15) ……

1. Oceans cover (覆盖) about 71% of Earth.2. About 80% of all life on Earth is under the ocean. 3....4. About 90% of all volcanic activities (火山活动) happen in the oceans. ……

energetic but indirect crash between Earth and a planet the size of Mars, which is about half Earth's size... the incoming planet and melt Earth all the way through, Canup said. Some hot rock debris would also ……

, covering about 70 percent of Earth's surface. Millions of living things live in the oceans. Fresh water...ECOSYSTEM refers to all the things that form the environment we live in and their relations ……

, covering about 70 percent of Earth's surface. Millions of living things live in the oceans. Fresh water...ECOSYSTEM refers to all the things that form the environment we live in and their relations ……

The moon is about 384,400 km away from Earth. It would take about three years to ride a bike from Earth to the moon.The moon is about 384,400 km away from Earth. It would take about three years ……

. That’s nine in all. Venus is the first of the evening stars. Beyond it Earth, beyond...  Read this riddle about the planets in the solar system (太阳系). Write the names of each ……

’s in the universe? 古老的宇宙The universe includes (包括) the Earth and all the things in space. It includes planets... heat and light to all the things on Earth. Light helps the animals, plants and us humans2 to live ……

’s in the universe? 古老的宇宙The universe includes (包括) the Earth and all the things in space. It includes planets... heat and light to all the things on Earth. Light helps the animals, plants and us humans2 to live ……

电影《2012》带给我的思考。THESE days we are all talking about one topic – 2012. The film says that on Dec 21, 2012, people will die because the Earth will be flooded (淹没). The terrible scene sets me thinking ……

善待地球，从我做起。ALL living things share a common home: the Earth. As human beings, though, we have... and events in April. Have a read about the most fun month in spring! About Earth DayEarth Day first ……

comes to the surface of the Earth. Perhaps you know about some of these places. One place... for new sources of energy. One source is heat from the Earth. We know that the center of the Earth ……

地球，善待我们的星球。We live on Earth. But how much do you know about our planet (星球)? On April 22, the 50th... about Earth. They looked at some models, such as a model of the sun, moon and Earth. By studying them ……