Download App

The World of Metals and Non-metals — Science STD 7 — Question

Gujarat BoardEnglish MediumSTD 7ScienceThe World of Metals and Non-metals5 Marks
Question
Observation : Table : Appearance, hardness, and effect of hammering on different objects or materials
Object/MaterialAppearance
(lustrous/non-lustrous)		Hard/SoftEffect of hammering
(fattens/ breaks into pieces)
Piece of copper
Piece of aluminium
Iron nail
Piece of coal
Lump of sulphur
(pea-sized)
Block of wood
✓

Answer

Object/MaterialAppearance
(lustrous/non-lustrous)		Hard/SoftEffect of hammering
(fattens/ breaks into pieces)
Piece of copperLustrousHardFlattens
Piece of aluminiumLustrousHardFlattens
Iron nailLustrousHardFlattens
Piece of coalNon-lustrousSoftbreaks into pieces
Lump of sulphur
(pea-sized)		Non-lustrousSoftbreaks into pieces
Block of woodNon-lustrousHard but not hard as metalNeither flattens nor breaks into pieces

Conclusion : Materials like copper, aluminium and iron are lustrous, hard and can be flattened into thin sheets.
Materials like coal, sulphur are non-lustrous, soft and breaks into pieces. Wood is neither malleable nor brittle.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "5 Marks Questions" from The World of Metals and Non-metals→The World of Metals and Non-metals — all question types→Science STD 7 question papers→Gujarat Board STD 7 question papers→Gujarat Board question paper generator→

Similar questions

How polar bear is adopted in the polar climatic condition.
→
What are the safety precautions while working with electricity?
→
Geeta had setup the experiment as shown in figure.
Image

She found out that the steel nail in setup X had attracted less iron pins than the steel nail in setup Y. What could be the reason for this?
→
Explain the various steps involved in water treatment plant.
→
One day Sachin had gone to his uncle who lives in a village. He saw there a large number of people defecate in an open area because proper toilet facilities are not there. He wondered about the groundwater contamination, as he studied in his class that this act may cause water-borne diseases. He convinced village people to make toilets to avoid such an out break of water-borne diseases.
  1. Name two water-borne diseases.
  2. Explain vermi-composting toilets.
  3. What values are shown by Sachin?
→
Describe a simple experiment to show that the bulb lights up when an electric circuit is complete and vice-versa.
→
Why should we worry about the conditions and issues related to forests far from us?
→
In the figure, label the arrows and indicate the direction of
  1. Movement of air.
  2. Movement of diaphragm.
  3. Movement of ribs.
→
Explain the two types of respiration.
→
Explain the relationship between questions and discovery in science.
→