Air and Water
Review the essentials and check your understanding after your teacher’s explanation.
Clean water, pure water饮用水与纯水
See why removing dirt is different from removing dissolved substances.
Complete this core task when your teacher assigns the topic. Use the short recall cards before class.按老师指定的知识点完成网页预习，周内用提示卡回忆；不是整章预习。
Choose a topic
Air and pollutants
Link each specified pollutant to its source and adverse effects.
Climate and emission control
Explain greenhouse warming and methods of reducing emissions.
Water tests and purity
Distinguish detecting water from showing that water is pure.
Water treatment and aquatic life
Explain what each water-treatment stage removes and how pollutants affect aquatic life.
Printable worksheets
Guided Worksheet
Follow teacher models, practise independently and check with your partner.
Download DOCX ↓Consolidation Worksheet
A flexible review lesson with core questions and an optional challenge.
Download DOCX ↓Printable hint cards
Use a card when you need a starting step, then return to the question. Chapter 15 cards are on pages 4–5 of the collection. Print the relevant pages and cut out the cards you need.
Download hint cards DOCX ↓