Textbook
Chapter 1: Scientific Skills
Chapter 2: Science Room Rules
Chapter 3: Humans
Chapter 4: Animals
Chapter 5: Plants
Chapter 6: Measurement
Chapter 7: Density
Chapter 8: Acid and Alkali
Chapter 9: The Solar System
Chapter 10: Machine
Chapter 8: Acid and Alkali
What you need to learn in this chapter
In this chapter, we will learn about acids and alkalis.
We can test if something is acidic, alkaline, or neutral by using litmus paper.
If the paper changes color to red, it is acidic.
If it changes to blue or green, it is alkaline.
We can also use our taste and touch to make generalizations about substances.
For example, lemon juice tastes sour, so it is acidic.
Soap feels slippery, so it is alkaline.
Let's have fun investigating and testing different substances to learn more about acids and alkalis!
Topics in this chapter
1. Acid and Alkali
What you will learn in this topic
- Test acidic, alkaline and neutral substances through changes in colour of litmus paper by carrying out investigation
- Make generalisation on acidic, alkaline and neutral substances through taste and touch by testing a few substances
- Explore other materials to test acidic, alkaline and neutral substances
- Explain the result of observations about acid and alkali through written or verbal forms, sketches or ICT in a creative way
Live Tuition Recordings
Unit 8: Acid & Alkali (Litmus Paper Substitutes)
Tutor: Teacher Zahida
Thursday
25 Sep 2025
08:00 pm
Unit 8: Acid & Alkali (Acidic, Alkaline and Neutral Substances)
Tutor: Teacher Zahida
Thursday
11 Sep 2025
08:00 pm
Unit 8: Acid & Alkali (Acidic, Alkaline and Neutral)
Tutor: Teacher Zahida
Thursday
04 Sep 2025
08:00 pm
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