跟读练习: Why Are Elements Arranged This Way? | LESSON 4-The Periodic Table | Science in English - 通过视频学习英语口语
选择练习模式
每种模式都会打开全屏练习室。
85 句
如果句子过短或过长，请点击 Edit 进行调整。
1
Why are elements arranged this way?
2
Take a look at the periodic table.
3
There are many chemical elements, but they are not arranged randomly.
4
Look at the horizontal rows, and then look at the vertical columns.
5
What do you notice?
6
Can you see a pattern?
7
Let's find out why elements are arranged this way.
8
Welcome to lesson four, an overview of the periodic table.
9
In this lesson, we'll learn how chemical elements are arranged.
10
We'll also explore element squares, periods, and groups.
11
Finally, we'll use the periodic table to identify metals, non -metals, and noble gases.
12
Alright, let's get started.
13
First, let's look at our learning objectives.
14
By the end of this lesson, you should be able to do three things.
15
First, describe the principles tables used to arrange chemical elements.
16
Second, identify information in an element square, and explain periods and groups.
17
Third, use the periodic table to identify metals, nonmetals, and noble gases.
18
Keep these objectives in mind as we go through the lesson.
19
Now, let's begin.
20
How are elements arranged?
21
Let's take a closer look at the periodic table.
22
The first principle is that elements are arranged in order of increasing nuclear charge.
23
Next, let's look at periods.
24
Elements in the same period have the same number of electron shells.
25
Now, what about groups?
26
Elements in the same group A have similar chemical properties.
27
Notice the pattern.
28
The periodic table helps us understand the relationships between elements.
29
Now, let's look at an element square.
30
Take a look at the element square for oxygen.
31
At the top, we can see the atomic number.
32
It is 8.
33
The chemical symbol is O, and the element name name is oxygen.
34
The atomic mass shown here is 16.
35
So, one element square gives us several important pieces of information.
36
Can you point to the atomic number?
37
What about the chemical symbol?
38
Can you find the element name and the atomic mass?
39
Good job!
40
Now, let's look at periods and groups.
41
Let's start with periods.
42
A period is a horizontal row in the periodic table.
43
The period number tells us the number of electron shells in an atom of an element in that period.
44
Now let's look at groups.
45
A group is a vertical column.
46
For the group A elements studied in this lesson, the group number corresponds to the number of electrons in the outermost shell.
47
Take a look at the diagram.
48
Can you identify a period?
49
Now, can you identify a group?
50
Excellent.
51
Let's move on to the different categories of elements.
52
The periodic table helps us identify different categories of elements.
53
First, let's look at metals.
54
Examples include iron, copper, and aluminium.
55
Next, we have nonmetals.
56
Examples include oxygen, sulfur, and chlorine.
57
Finally, let's look at noble gases.
58
These include helium, neon, and argon.
59
Notice that these categories occupy different regions of the periodic table.
60
Now, let's use the table to classify some elements.
61
Alright, it's your turn.
62
Take a look at these symbols, F -E -O -N -E -C -U -C -L and H -E.
63
First, find each element on the periodic table.
64
Next, identify its period and group.
65
Then, classify it as a metal, a non -metal, or a noble gas.
66
Now, work with a partner and explain your answers.
67
Remember, don't just give the answer.
68
Explain how you used the periodic table.
69
Excellent work.
70
Let's review the key ideas.
71
Finally, let's review what we've learned today.
72
First, elements are arranged in order of increasing nuclear charge.
73
Second, the periodic table has periods and groups.
74
A period is a horizontal row.
75
and a group is a vertical column.
76
Elements in the same period have the same number of electron shells.
77
Elements in the same group A have similar chemical properties.
78
Finally, we can use the periodic table to identify metals, nonmetals, and noble gases.
79
Before we finish, think about this question.
80
Why do elements in the same group have similar chemical properties?
81
Think about the electrons in the outermost shell.
82
Remember, the periodic table is more than a list of elements.
83
It helps us understand patterns and relationships between them.
84
Great job today.
85
Keep practicing your science English, and I'll see you in the next lesson.
同频道
C12
What are substances made of ? | Lesson 5: MOLECULES—SIMPLE SUBSTANCES&COMPOUNDS | Science in English
Daily ConversationUniversity Students
B14
Science in English #7 | Properties of Homogeneous Mixtures
Daily ConversationHigh School Students
B16
Science in English #3 | The Periodic Table
Daily ConversationHigh School StudentsUniversity Students
B19
Science in English #2 | ATOMS
IELTS PrepTOEFL PrepHigh School Students
B14
Everything Is Made of Atoms?! | Lesson 2: The Atom | Science in English
TOEFL PrepHigh School StudentsUniversity Students
B15
Do these symbols mean anything to you? | Lesson 3: Chemical Elements | Science in English
Daily ConversationHigh School Students
B16
Science in English #4 | Compounds and chemical formulas
TOEFL PrepUniversity Students
B16
Science in English #6 | Types of Mixtures
TOEFL PrepHigh School StudentsUniversity Students
B113
Science in English #1 | ELEMENTS
IELTS PrepTOEFL PrepHigh School Students
C1Why do atoms form chemical bonds? | Lesson 6: INTRODUCTION TO CHEMICAL BONDS | Science in English
Daily ConversationUniversity Students
FOR YOU
推荐视频
![Unit 2: Humans and the environment - Speaking - English 10 (Global Success) [OLM.VN]](https://img.youtube.com/vi/2fH5Q_9VSNc/mqdefault.jpg)
B11
103 句
Unit 2: Humans and the environment - Speaking - English 10 (Global Success) [OLM.VN]
Daily ConversationHigh School Students
B194 句
States of Matter | Solid Liquid Gas
Daily ConversationHigh School Students
B11
11 句
Lesson 1 - Presentation
Daily ConversationHigh School Students
B12
25 句
What Is An Atom ? | Properties of Matter | Chemistry | FuseSchool
Daily ConversationHigh School Students
B1824
36 句
GRADE 10 UNIT 1 L1
Daily ConversationHigh School Students
A21
814 句
Learn English | Reading for Vocabulary | Level B | Lesson 04 | Brian Stuart (미국교과서)
Daily ConversationHigh School Students
B12
7 句
The Periodic Table Song (2018 Update!) | SCIENCE SONGS
Daily ConversationHigh School StudentsUniversity Students
A21
116 句
Luyện nghe chép chính tả Tiếng Anh | Level 2 - Unit 10
Daily ConversationHigh School Students
A21
78 句
EVERYBODY UP 4 UNIT 4 LAST WEEK LESSON 4 ANCIENT ROME
KidsTeensDaily Conversation
B12
21 句
Unit 9.The blue sky
Daily ConversationHigh School StudentsUniversity Students
本课的词汇与口语要点
这节口语课以视频“Why Are Elements Arranged This Way?”为素材。 视频中反复出现的词有：element, table, periodic, period, identify。 这段视频共有 85 个句子、697 个单词可供跟读。 讲话部分时长为 5:41。 说话人语速平稳，每分钟约 123 个词，很适合跟读。 只有 77% 的单词属于英语最常用的 3,000 词，词汇难度较高。
视频中的重点词汇
视频中 15 个值得学习的单词，附发音和释义：
| 单词 | 发音 | 释义 |
|---|---|---|
| element 名词 | /ˈɛləmənt/ | 要素 |
| periodic 形容词 | /ˌpɪɹiˈɑdɪk/ | 週期的 /周期的 |
| arrange 动词 | /əˈɹeɪnd͡ʒ/ | 安排, 佈置 /布置 |
| lesson 名词 | /ˈlɛs.ən/ | 課業 /课业, -課 /-课 |
| shell 名词 | /ʃɛl/ | 貝 /贝, 貝殼 /贝壳 |
| noble 形容词 | /ˈnoʊbəl/ | 高貴 /高贵, 高尚 |
| atomic 形容词 | /əˈtɑː.mɪk/ | 原子 |
| symbol 名词 | /ˈsɪmbəl/ | 符號 /符号 |
| oxygen 名词 | /ˈɑksɪd͡ʒən/ | 氧 |
| vertical 形容词 | /ˈvɝ.tɪ.kəl/ | 豎的 /竖的, 垂直 |
| horizontal 形容词 | /ˌhoɹəˈzɑn.təl/ | 水平, 橫的 /横的 |
| electron 名词 | /ɪˈlɛk.tɹɑn/ | 電子 /电子 |
| objective 名词 | /ɒbˈd͡ʒɛk.tɪv/ | 目標 /目标, 目的 |
| principle 名词 | /ˈpɹɪn.sɪ.pəl/ | 原理, 原則 /原则 |
| column 名词 | /ˈkɒləm/ | 柱子, 柱 |
视频中出现的短语动词
| 单词 | 释义 |
|---|---|
| find out 动词 | 找出, 查明 |
| go through 动词 | 通過 /通过 |
值得反复跟读的句子
视频中简短而完整的句子，可以直接用在日常对话里：
- What do you notice?
- Can you see a pattern?
- Let's find out why elements are arranged this way.
- Can you point to the atomic number?
- Can you identify a period?
视频中的语法
说话人最常用的结构，并附上视频中的原话：
| 结构 | 视频中的用法 |
|---|---|
| 被动语态 be + 过去分词 — 强调发生了什么，而不是谁做的 | are not arranged · are arranged |
| “will” 表将来 will + 动词 — 决定、承诺或预测 | we'll learn · We'll also explore · we'll use |
需要注意的发音
说话人用了 6 次缩略和弱读形式，例如 we'll, don't, I'll。请按听到的简短形式来说。
- 长单词——注意重音位置: periodic /ˌpɪɹiˈɑdɪk/, horizontal /ˌhoɹəˈzɑn.təl/, aluminium /ˌæl.(j)uˈmɪn.i.əm/
中文母语者容易读错的音：
- /v/ — 不要读成 /w/，上齿轻触下唇: vertical /ˈvɝ.tɪ.kəl/, objective /ɒbˈd͡ʒɛk.tɪv/, overview /ˈoʊ.vɚˌvjuː/
- 词尾辅音 — 要读清楚，后面不要加元音: element /ˈɛləmənt/, periodic /ˌpɪɹiˈɑdɪk/, arrange /əˈɹeɪnd͡ʒ/, atomic /əˈtɑː.mɪk/, objective /ɒbˈd͡ʒɛk.tɪv/
- /r/ 和 /l/ 的区别: horizontal /ˌhoɹəˈzɑn.təl/, electron /ɪˈlɛk.tɹɑn/, principle /ˈpɹɪn.sɪ.pəl/, explore /ɪkˈsploɹ/, randomly /ˈɹændm̩li/
如何用这段视频练习
- 先完整听一遍视频，不要开口，记下不认识的单词。
- 用正常速度逐句跟读，每句重复到你的节奏与说话人一致为止。
- 录下自己的声音并与原声对比，特别注意 element, periodic, arrange 这类单词。
什么是跟读法？
跟读法 (Shadowing) 是一种有科学依据的语言学习技巧，最初开发用于专业口译员的培训，并由多语言者Alexander Arguelles博士普及。这个方法简单而强大：您在听英语母语原声的同时立即大声重复——就像是一个延迟1-2秒紧跟说话者的影子。与被动听力或语法练习不同，跟读法强迫您的大脑和口腔肌肉同时处理并模仿真实的讲话模式。研究表明它能显着提高发音准确性，语调，节奏，连读，听力理解和口语流利度——使其成为雅思口语备考和真实英语交流最有效的方法之一。