January 2025
Intermediate to advanced
568 pages
18h 34m
English
1. All objects are made of substances called materials.
2. Pencil, chair and table are made of materials like wood.
3. Book, disposable cups, notebook and newspaper are made of paper.
4. Placing similar things together is called grouping.
5. Grouping is done by shopkeeper by keeping similar items on the same shelf, which makes it easier for us to find the items we need.
6. Appearance, hardness, solubility, texture.
7. Materials which can be compressed or scratched easily are called soft.
8. They are hard and opaque.
9. Water is very important constituent for human body, it regulates all the metabolic activities in human body.
10. (a) Transparent: They allow light to pass through
(b) ...
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