Q1.
Make a list of objects you see around and also write the names of the materials they are made up of in Table 6.1.
Table 6.1, page 102 — Identify materials. The table is printed blank; fill in your own observations.
| I observe | Materials they are made up of |
|---|---|
Answer
Look around your classroom and your home and fill Table 6.1 like this. Notice that some objects need more than one material.
| Table 6.1: Identify materials | |
|---|---|
| I observe | Materials they are made up of |
| Notebook | Paper (cover — thick paper or cardboard), metal stapler pins |
| Pen | Plastic body, metal nib and spring, ink |
| Tumbler | Steel (a metal) — or glass, or plastic |
| Window pane | Glass, fixed in a wooden or aluminium frame |
| Desk and bench | Wood, with iron nails and an iron frame |
| Water bottle | Plastic body and cap (or steel) |
| School bag | Cloth or synthetic fibre, plastic zip, metal buckle |
| Sweater | Wool |
| Diya (earthen lamp) | Baked clay (terracotta) |
| Chalk | Chalk powder pressed into a stick |
| Cricket ball | Cork centre, wound thread, leather cover |
| Bangle | Glass — or lac, or metal |
The conclusion the book wants: based on everyday observation, objects are made up of various materials. Any substance that is used to create an object is called a material.
Did you know? The earliest pottery of the Indian subcontinent is 7,000–8,000 years old — found at Lahuradewa in the Ganga plains and Mehrgarh in Baluchistan. From about 4000 BCE the Sindhu–Sarasvatī people were turning pots on a wheel, coating them with coloured ‘slips’ and baking them in kilns. Baked clay is called terracotta. Huge Harappan storage jars can be seen today at the National Museum, New Delhi.