托福听力地质学材料难吗 托福听力地质学材料实例

 小编在这里为大家推荐托福听力地质学材料难吗以及托福听力地质学材料实例,希望能帮助到大家。

 一、托福听力地质学材料难吗?

 1.词汇困难。

 2.背景和内容,疏远抽象。

 第一点和第二点原因非常简单,我们在平时的学习过程中,除非选择相关课程或对地质学感兴趣的同学,否则很少听到相关内容,地质学的学习本身也基于物理、化学、生物等学科,历史、考古、环境学的交叉知识,理解起来比较困难。

 3.心情容易崩溃。

 这个问题也适用于天文、生物等学科,特别是说不知道的概念的时候。

 首先,托福没有考察大家是否能学到这些知识点。这些概念作为语言类考试,其首要任务是测试其提供的信息,能否理解。也就是说,所谓的不行,人们说明。

 我们应该紧张的不是这个定义,而是内容是否遇到过。对方给出定义,我抓不住这个定义是什么。

 4.笔记本不能使用。

 地质学文章的内容是抽象的,如果背景知识不足,很难在短时间内一次理解,笔记的压力也会增加。无法理解的部分只能通过笔记来增加记忆。如果我们整篇文章的结构难以把握的话,我会先抓住考试点,一般的四个主题也会解决。听起来很混乱,做得很清楚。

 二、托福听力地质学材料实例

 (1)

 Professor: That’s right. It’s one of the longest and deepest limestone caves not just in the country but in the world. Now, what else?

 Male Student: Well, it was formed because of sulfuric acid, right?

 Professor: That’s it. Yeah, what happens is you have deep underground oil deposits and there are bacteria. Here let me draw a diagram. Part of the limestone rock layer is permeated by water from below. Those curly lines are supposed to be cracks in the rock. Below the water table and rock is oil. Bacteria feed on this oil and release hydrogen sulfide gas. This gas is hydrogen sulfide, rises up and mixes with oxygen in the underground water that sits in the cracks and fissures in the limestone. And when hydrogen sulfide reacts with the oxygen in the water, the result of that is sulfuric acid, Ok? Sulfuric acid eats away at limestone very aggressively. So you get bigger cracks and then passageway is being formed along the

 openings in the rock and it’s all underground. Ah yes, Paul?

 (2)

 Sulfuric acid eats away at limestone very aggressively. So you get bigger cracks and then passageway is being formed along the openings in the rock and it’s all underground. Ah yes, Paul?

 Male Student: So that water... It’s not flowing, right? It’s still?

 Professor: Yes, so there are two kinds of limestone caves. In about 90 percent of them, you have water from the surface, streams, waterfall or whatever - moving water that flows through cracks found in limestone. It’s the moving water itself that wears away at the rock and makes passageways. Also, in surface water, there is a weak acid, carbonic acid, not sulfuric acid but carbonic acid that helps dissolve the rock. With a little help from this carbonic acid, moving water forms most of the world’s limestone caves. When I was

 researching this for a study a few years ago, I visited a couple of these typical limestone caves, and they were all very wet, you know, from streams and rivers. This flowing water carved out the caves and the structures inside them.

 (3)

 Yes, so there are two kinds of limestone caves. In about 90 percent of them, you have water from the surface, streams, waterfall or whatever - moving water that flows through cracks found in limestone. It’s the moving water itself that wears away at the rock and makes passageways. Also, in surface water, there is a weak acid, carbonic acid, not sulfuric acid but carbonic acid that helps dissolve the rock. With a little help from this carbonic acid, moving water forms most of the world’s limestone caves. When I was researching this for a study a few years ago, I visited a couple of these typical limestone caves, and they were all very wet, you know, from streams and rivers. This flowing water carved out the caves and the structures inside them.

 Male Student: But not Lechuguilla?

 Professor: Dry as a bone. Well, that might be a bit of an exaggeration. But it’s safe to say that it’s sulfuric acid and not moving water that formed Lechuguilla cave and those few other ones like it. In fact, there is no evidence that flowing water has even gone in or out of the

 cave. So, it’s like a maze. You have passageways all around. There are wide passages, narrow ones at all different depths, like underground tunnels in the limestone.

 小编为大家整理这些托福听力地质学材料难吗 托福听力地质学材料实例,希望能帮助到大家。

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