跟读练习: Thermal Energy in Water – Food Coloring Demonstration - 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。

20 句
如果句子过短或过长，请点击 Edit 进行调整。
1
You may recall that all matter is made of tiny molecules that are constantly in motion, and the movement of these molecules is called thermal energy.
2
Remember, the more thermal energy matter has, the faster its molecules move and the hotter it becomes.
3
Look at how the motion of the particles change as ice melts into liquid water, then boils and evaporates into water vapor.
4
Today, we're going to see this principle in action by observing how temperature affects the motion of molecules in water.
5
We'll use food coloring as a visual tracker to reveal the invisible dance of water molecules at different temperatures.
6
First, prepare two beakers that are each three-quarters full, one with very cold water and one with hot water.
7
Now, here's the key moment.
8
Drop one yellow and one blue food coloring drop into each beaker.
9
When blue and yellow, which are primary colors, mix, they create green, a secondary color.
10
carefully and compare what happens in both beakers.
11
Notice how the food coloring behaves differently in each beaker.
12
In the hot water, the colors quickly swirl, spread, and blend into green.
13
In the cold water, the movement is much slower and more gradual.
14
Why?
15
This dramatic difference reveals what's happening at the molecular level.
16
The water molecules in the hot water are moving rapidly, constantly colliding with the food coloring molecules with greater force and frequency.
17
These energetic collisions push the color throughout the water quickly.
18
In contrast, the slower-moving molecules in the cold water bump into the food coloring less often and with less force,
19
resulting in much slower diffusion.
20
This experiment beautifully demonstrates that thermal energy truly is energy in motion.

下载应用

流利口语所需的一切

AI 发音评分逐句打分
音标练习掌握每个音
词汇学习建立你的词库
词汇游戏边玩边学
扫码
扫码
Download on theApp StoreGet it onGoogle Play

同频道

All About ReptilesC1
5

All About Reptiles

Daily ConversationUniversity Students
Simple Machines – ScrewsB1

Simple Machines – Screws

KidsDaily Conversation
All About MossesB1
2

All About Mosses

Daily ConversationUniversity Students
Interactions in Ecosystems – WetlandsB1
1

Interactions in Ecosystems – Wetlands

KidsDaily Conversation
Temperate ClimatesB1
1

Temperate Climates

KidsDaily Conversation
All About Crustaceans – Quiz EditionB2
1

All About Crustaceans – Quiz Edition

Daily ConversationUniversity Students
Pollination in a MinuteB2
100

Pollination in a Minute

Daily ConversationHigh School Students
Exploring the pH ScaleB2
3

Exploring the pH Scale

Daily ConversationHigh School Students
Earth Water Sources – Streams and RiversB1
6

Earth Water Sources – Streams and Rivers

KidsDaily Conversation
Changing States of MatterB1
6

Changing States of Matter

KidsDaily Conversation
Animal Structures for Catching PreyB1
3

Animal Structures for Catching Prey

KidsDaily Conversation
Ferns Grew Up. Why Couldn’t They Move On?C1
1

Ferns Grew Up. Why Couldn’t They Move On?

Daily ConversationHigh School Students
Water Pollution and How We Can Reduce It!B1
8

Water Pollution and How We Can Reduce It!

TeensDaily Conversation
Bulbs Arranged in Parallel – Brightness of BulbsB1
2

Bulbs Arranged in Parallel – Brightness of Bulbs

Daily ConversationHigh School Students
Characteristics of OrganismsB1
2

Characteristics of Organisms

KidsDaily Conversation
Heat Transfer – Convection #shorts #ngscienceB1
4

Heat Transfer – Convection #shorts #ngscience

TeensDaily Conversation
Separating Solutions – DistillationB1
2

Separating Solutions – Distillation

Daily ConversationHigh School Students
Heat Transfer – In a MinuteB1
2

Heat Transfer – In a Minute

Daily ConversationHigh School Students
Responses to StimuliB2
2

Responses to Stimuli

Daily ConversationHigh School Students
GrasslandsA2
2

Grasslands

KidsDaily Conversation
FOR YOU

推荐视频

Heat Conduction ExperimentB1
8
15 句

Heat Conduction Experiment

IELTS PrepTOEFL PrepHigh School Students
Carbon Dioxide – Oxygen CycleB1
18
29 句

Carbon Dioxide – Oxygen Cycle

IELTS PrepTOEFL PrepHigh School Students
Science in English #2 | ATOMSB1
9
41 句

Science in English #2 | ATOMS

IELTS PrepTOEFL PrepHigh School Students
Reading Explorer Foundation, Unit-2 Science of TasteB1
37
17 句

Reading Explorer Foundation, Unit-2 Science of Taste

IELTS PrepTOEFL PrepHigh School Students
What is Climate Change?B1
47
25 句

What is Climate Change?

IELTS PrepTOEFL PrepHigh School Students
States of matter | Middle school chemistry | Khan AcademyB1
9
87 句

States of matter | Middle school chemistry | Khan Academy

American AccentTOEFL PrepCambridge Exam PrepHigh School Students
Science experiment for Year 12 students: Đề thi IELTS LISTENING (actual test)B2
1
93 句

Science experiment for Year 12 students: Đề thi IELTS LISTENING (actual test)

IELTS PrepTOEFL PrepCambridge Exam Prep
Nuclear Power #nuclear power earB1
22
6 句

Nuclear Power #nuclear power ear

IELTS PrepTOEFL PrepUniversity Students
IELTS Speaking Vocabulary - Talking about the weatherB1
276 句

IELTS Speaking Vocabulary - Talking about the weather

IELTS PrepHigh School StudentsUniversity Students
Exploding Eggshells is Actually Useful?B2
3
18 句

Exploding Eggshells is Actually Useful?

IELTS PrepTOEFL PrepUniversity Students
Part 2: Science subjectB1
4
21 句

Part 2: Science subject

IELTS PrepTOEFL PrepHigh School Students
PTE Retell Lecture July 2026 | Real Exam Questions With Answers | 4K Ultra HD VideoB2
2
120 句

PTE Retell Lecture July 2026 | Real Exam Questions With Answers | 4K Ultra HD Video

IELTS PrepTOEFL PrepUniversity Students

本课的词汇与口语要点

这节 B1 级别的口语课以视频“Thermal Energy in Water – Food Coloring Demonstration”为素材。 视频中反复出现的词有：molecules, coloring, beaker, motion, color。 这段视频共有 20 个句子、280 个单词可供跟读。 讲话部分时长为 2:53。 说话人语速较慢，每分钟约 97 个词，你有足够的时间模仿每一个音。 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

视频中最难的 15 个单词，附发音和释义：

单词发音释义
molecule 名词/ˈmɑ.lɪ.kjul/分子
beaker 名词/ˈbiːkɚ/燒杯 /烧杯
collide 动词/kəˈlaɪd/碰撞, 相撞
diffusion 名词/dɪˈfju.ʒən/散射
evaporate 动词/ɪˈvæp.ə.ɹeɪt/蒸發掉 /蒸发掉, 揮發 /挥发
vapor 名词/ˈveɪpɚ/蒸氣 /蒸气
gradual 形容词/ˈɡɹæd͡ʒuəl/逐漸的 /逐渐的, 平緩的 /平缓的
energetic 形容词/ˌɛn.əɹˈdʒɛt.ɪk/積極 /积极, 有活力
boil 动词/bɔɪ(ə)l/煮沸, 煮
particle 名词/ˈpɑɹtək(ə)l/粒子
beautifully 副词/ˈbju.tɪ.fə.li/美麗地 /美丽地
collision 名词/kəˈlɪʒn̩/碰撞
melt 动词/mɛlt/融化, 熔化
behave 动词/bɪˈheɪv/為人 /为人
observe 动词/əbˈzɜːv/遵守, 遵循

需要注意的发音

  • “sh” 和 “zh” 音: diffusion /dɪˈfju.ʒən/, collision /kəˈlɪʒn̩/
  • 长单词——注意重音位置: evaporate /ɪˈvæp.ə.ɹeɪt/, energetic /ˌɛn.əɹˈdʒɛt.ɪk/, beautifully /ˈbju.tɪ.fə.li/, invisible /ɪnˈvɪzəb(ə)l/, molecular /məˈlɛk.jə.ləɹ/

中文母语者容易读错的音：

  • /v/ — 不要读成 /w/，上齿轻触下唇: evaporate /ɪˈvæp.ə.ɹeɪt/, vapor /ˈveɪpɚ/, behave /bɪˈheɪv/, observe /əbˈzɜːv/, invisible /ɪnˈvɪzəb(ə)l/
  • 词尾辅音 — 要读清楚，后面不要加元音: collide /kəˈlaɪd/, evaporate /ɪˈvæp.ə.ɹeɪt/, energetic /ˌɛn.əɹˈdʒɛt.ɪk/, blend /blɛnd/, melt /mɛlt/
  • /r/ 和 /l/ 的区别: gradual /ˈɡɹæd͡ʒuəl/, particle /ˈpɑɹtək(ə)l/, molecular /məˈlɛk.jə.ləɹ/, differently /ˈdɪf.ə.ɹənt.li/

如何用这段视频练习

  1. 先完整听一遍视频，不要开口，记下不认识的单词。
  2. 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。
  3. 录下自己的声音并与原声对比，特别注意 molecule, beaker, collide 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。

影子跟读法: 阅读完整分步指南 →