So, the inputs are bits of rock and organic matter. Now, the bits of rock, the inorganic input to soil, uh...they come from the breakdown of rocks on Earth's surface through a process called weathering. Weathering can be either physical or chemical. ...
Well, there are no trees to absorb the rain, and there was a lot of rain. So the rain eroded the soil and swept it into the rivers. This is called silting, when soil particles are washed into the rivers. And the silting continued at an alarming rate. ...
What is the longest river in Australia called? Rivers: Rivers have always been vital to human habitation of an area. While they provide fish for food and water to irrigate land, their greatest contribution to human settlement and civilization is the ease of transportation they provide. Through ...
Miller. “Hurricanes bring a lot of water to rivers and lakes that are becoming dry. Animals and fish come back to live in them. Hurricanes also pick up heat from the very hot areas of the world and drop it in less warm places.” “So, hurricanes can be good things,” Vicky said ...
34. What is a challenge for salmon when they return to Scotland's rivers? A. There is a shortage of food. B. There are many fishermen. C. The ecology environment has changed. D. The river systems are unsuitable for the forest growth.35. What does Cairns really intend to tell us in...
China is the biggest country in Asia. It’s almost as big as the USA. China has the biggest population in the world. The people here are friendly and hard-working. The Yangtze River is one of the longest rivers ...
Our village is ancient but its mountains and rivers attract many tourists.The mountains are in different shapes. They look amazing. Of all the mountains, Mount Lingshi is the highest. It’s about 1,000 meters high. Fe...
The tidal currents are constantly churning up the sediments that rivers deposit in the estuary. But a barrage would reduce the tidal currents. So a lot of that sediment would settle to the floor of the estuary. It wouldn't get stirred up so much. ...
1.B 推理判断题。根据第一段中的"Airplanesseedthreateningstormcellswith a chemicaltomakesmallicecrystalsfallasrainbeforetheycangrowintodangeroushailstones."可知,飞机向有威胁的风暴细胞播撒化学物质,使小冰晶在 变成危险的雹块之前以雨的形式落下。由此可知,云种散播项目的目的 是防止冰雹的形成。 2.A 细节理解...
You can find nature wherever you are: beaches, gardens, parks and rivers.”,可知自然意味着不是人类创造的世界,而学校是人类创造的世界。故选A。 (2)题详解: 细节理解题。根据“It makes me feel happy and takes my mind off things.”,可知Raphie认为探索自然能让他感到开心。故选C。 (3)题详解:...