หนังสือออนไลน์ ระดับสูง ฉบับผู้ใหญ่
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Lesson 1 Science วิทยาศาสตร์18 Topics
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Sub topics หัวข้อย่อย
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New Vocabulary Part 1
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New Vocabulary Part 2
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New Vocabulary Part 3
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Food chemistry
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Environmental chemistry
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Agricultural chemistry
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Thermal expansion and contraction
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Friction
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Types of rocks
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Volcanoes
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Our Solar System
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Body systems part 1
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Body systems part 2
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Science – Audio Clip
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Science - Free Speaking Activity
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Questioning & Answering
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Vocabulary - Unit 1
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Sub topics หัวข้อย่อย
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Lesson 2 Geography ภูมิศาสตร์11 Topics
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Lesson 3 History ประวัติศาสตร์10 Topics
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Lesson 4 Engineering วิศวกรรม11 Topics
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Lesson 5 Business ธุรกิจศึกษา10 Topics
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Lesson 6 Law กฎหมาย12 Topics
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Lesson 7 Politics การเมือง12 Topics
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Sub topics หัวข้อย่อย
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New vocabulary part 1
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New vocabulary part 2
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New vocabulary part 3
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The advantages and disadvantages of an authoritarianism form of government
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Hereditary ruler
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Elections
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Social media
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Politics - Audio clip
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Politics - Free Speaking Activity
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Questioning n Answering
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Vocabulary - Unit 7
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Sub topics หัวข้อย่อย
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Lesson 8 Psychology จิตวิทยา12 Topics
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Lesson 9 Literature วรรณกรรม11 Topics
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Lesson 10 Art ศิลปะ12 Topics
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Lesson 11 Music ศึกษาดนตรี12 Topics
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Lesson 12 Religion ศาสนา12 Topics
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Lesson 13 Language ภาษา10 Topics
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Lesson 14 Physical education พลศึกษา12 Topics
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Lesson 15 Cooking การทำอาหาร12 Topics
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Book 3 Final Test7 Topics
Chemistry เคมี
Environmental chemistry
Environmental chemistry
Environmental chemists study how chemicals interact with the natural environment. Environmental chemistry is a study that involves both analytical chemistry and an understanding of environmental science with various assessments being used. Environmental chemists must first understand the chemicals and chemical reactions present in natural processes in the soil, water and air. Sampling and analysis can then determine if human activities have contaminated the environment or caused harmful reactions to affect it. Water quality is an important area of environmental chemistry. Completely “pure” water does not exist in nature as it always has some kinds of minerals or other substances dissolved in it, even so it is still possible to predict where cleaner water sources may occur. Water quality chemists test rivers, lakes and ocean water for characteristics such as dissolved oxygen, salinity, turbidity, suspended sediments, and ph-levels. Water that is for human consumption must be free of harmful contaminants and may be treated with additives like fluoride and chlorine to insure it is clean enough for human consumption.
Question:
- What’s the first thing environmental chemists must understand?
………………………………………………………. - Why is there no such thing as ‘pure’ water?
………………………………………………………. - How is water treated to insure it’s clean enough for human consumption?
……………………………………………………….
Answer:
Question:
หนังสือออนไลน์ ระดับสูง ฉบับผู้ใหญ่
-
Lesson 1 Science วิทยาศาสตร์18 Topics
-
Sub topics หัวข้อย่อย
-
New Vocabulary Part 1
-
New Vocabulary Part 2
-
New Vocabulary Part 3
-
Food chemistry
-
Environmental chemistry
-
Agricultural chemistry
-
Thermal expansion and contraction
-
Friction
-
Types of rocks
-
Volcanoes
-
Our Solar System
-
Body systems part 1
-
Body systems part 2
-
Science – Audio Clip
-
Science - Free Speaking Activity
-
Questioning & Answering
-
Vocabulary - Unit 1
-
Sub topics หัวข้อย่อย
-
Lesson 2 Geography ภูมิศาสตร์11 Topics
-
Lesson 3 History ประวัติศาสตร์10 Topics
-
Lesson 4 Engineering วิศวกรรม11 Topics
-
Lesson 5 Business ธุรกิจศึกษา10 Topics
-
Lesson 6 Law กฎหมาย12 Topics
-
Lesson 7 Politics การเมือง12 Topics
-
Sub topics หัวข้อย่อย
-
New vocabulary part 1
-
New vocabulary part 2
-
New vocabulary part 3
-
The advantages and disadvantages of an authoritarianism form of government
-
Hereditary ruler
-
Elections
-
Social media
-
Politics - Audio clip
-
Politics - Free Speaking Activity
-
Questioning n Answering
-
Vocabulary - Unit 7
-
Sub topics หัวข้อย่อย
-
Lesson 8 Psychology จิตวิทยา12 Topics
-
Lesson 9 Literature วรรณกรรม11 Topics
-
Lesson 10 Art ศิลปะ12 Topics
-
Lesson 11 Music ศึกษาดนตรี12 Topics
-
Lesson 12 Religion ศาสนา12 Topics
-
Lesson 13 Language ภาษา10 Topics
-
Lesson 14 Physical education พลศึกษา12 Topics
-
Lesson 15 Cooking การทำอาหาร12 Topics
-
Book 3 Final Test7 Topics
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Lesson 1 : Environmental chemistry
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Question 1 of 3
1. Question
1. What’s the first thing environmental chemists must understand?
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Question 2 of 3
2. Question
2. Why is there no such thing as ‘pure’ water?
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Question 3 of 3
3. Question
3. How is water treated to insure it’s clean enough for human consumption?