The first thing to remember is that the sea is very big. When you look at the map of the world you will find there is more water than land. The sea covers three quarters of the world. The sea is also very deep in some places. It is not deep everywhere. Some parts of the sea ...
In most parts of the sea, there are plenty of fishes and plants. Some live near the top of the sea. Others live deep down. There are also millions of tiny living things that float in the sea. These floating things are so small that it is hard to see them. Many fish live by e ...
Picking up a stone lying under water, you will find that it is lighter underwater than you lift it out intothe air. These experiences show that a liquid exerts(施加;产生) an upward force on any object in it. This upward force of a liquid is called buoyant force,中学英语园地(高三版)...
Objects float when the volume of water they displace is less than the volume of the objects themselves. When objects sink, the volume of water they displace is greater than the volume of the object. The principle may seem relatively simple: Light objects float and heavy objects sink. However,...
The pockets of air in the bubble wrap mean that the ball and bubble wrap together are less dense than the water, which means the ball floats! Extension Task What’s the smallest amount of bubble wrap you can use to make your ball float? Using the knowledge you’ve gained from this acti...
Mr. Allen held out a glass of water with three ice cubes in it. “Why do things float?” he asked the class. No one said a word. The whole class was 1 . “Anyone?” Mr. Allen smiled at his students. “Let’s brainstorm some answers.” He swirled (旋动) the glass gently....
So far in this book we've focused on land-based activities. It's time to hit the water. In this chapter, we will explore the basic physics behind boats and things that float. As with the chapters on sports and car simulations, we'll start armed with an understanding of Newtonian mechan...
The next night, after we returned home, Ted called, saying that he was in a dorm.That day Mom taught me some valuable life___: Never accept “no” for an answer. Always___what you know is right.【1】A.activityB.errorC.answerD.opinion【2】A.troubleB.actionC.silenceD.public【3】...
athings that weigh less than water will float on it 比水称较少的事将漂浮对此 [translate] 英语翻译 日语翻译 韩语翻译 德语翻译 法语翻译 俄语翻译 阿拉伯语翻译 西班牙语翻译 葡萄牙语翻译 意大利语翻译 荷兰语翻译 瑞典语翻译 希腊语翻译 51La ...
know that fish s__1___ with their e___2__ open ? Do you w__3___? Fish livein w__4___. Some fishsleep i___5___ the daytime but some fish sleep at n___6___. If fishare moving in water ,they are s___7___. They mayfloat in water o___8___ stay on...