Class 7 Science Chapter 4 The World of Metals and Non-metals worksheet with MCQs, short answer questions, practice questions and extra questions based on the NCERT Curiosity textbook for revision and exam preparation.
Fresh Science Worksheet
Chapter 4 – The World of Metals and Non-metals
Class 7 Science | Curiosity | Reprint 2026-27
| Name: | ________________________________________ |
| Class & Section: | ________________________________________ |
| Date: | ________________________________________ |
| Marks: | ________________ |
Instructions:
- Read every question carefully.
- Answer all questions.
- Write neat and complete answers wherever required.
- Do not look at the answer key until you have completed the worksheet.
Section A – Multiple Choice Questions
1. Which property allows aluminium to be made into very thin sheets?
2. Which of the following is a good conductor of electricity?
3. The ringing sound produced by metals is due to:
4. Which metal is liquid at room temperature?
5. Which substance is generally a poor conductor of electricity?
6. Rust is mainly formed on:
7. Which two conditions are essential for rusting of iron?
8. Which of the following is a non-metal?
9. Which gas is essential for respiration?
10. Which metal is commonly used for electrical wiring?
Section B – Fill in the Blanks
11. The ability of a material to be beaten into thin sheets is called ____________.
12. The ability of a material to be drawn into wires is called ____________.
13. Metals generally produce a ____________ sound when struck.
14. The brown coating formed on iron is called ____________.
15. The process of formation of rust on iron is called ____________.
16. A substance that cannot be broken down into simpler substances is called an ____________.
17. The protective coating of zinc on iron is called ____________.
18. Sulfur dioxide dissolves in water to form ____________ acid.
Section C – True or False
19. Most metals are lustrous. ________
20. Non-metals are generally ductile. ________
21. Copper is a good conductor of electricity. ________
22. Wood is a better conductor of heat than metal. ________
23. Both air and water are needed for ordinary rusting of iron. ________
24. Sulfur is a metal. ________
25. Gold is highly malleable and ductile. ________
26. Rubber is a good conductor of electricity. ________
Section D – Match the Following
| Column A | Column B |
|---|---|
| 27. Malleability | A. Used for water purification |
| 28. Ductility | B. Can be beaten into sheets |
| 29. Sonority | C. Formation of rust |
| 30. Corrosion | D. Can be drawn into wires |
| 31. Chlorine | E. Produces ringing sound |
Section E – Identify the Material
32. I am shiny, can be beaten into sheets and am used in food packaging. Who am I?
33. I am a non-metal and my burning produces sulfur dioxide. Who am I?
34. I am a metal that is stored under kerosene because I react vigorously with water. Who am I?
35. I am a metal that is liquid at room temperature. Who am I?
36. I am a non-metal needed by humans for respiration. Who am I?
Section F – Very Short Answer Questions
37. What is metallic lustre?
38. Name any two malleable metals.
39. Name any two good conductors of electricity.
40. What is rust?
41. Name any two methods of preventing rusting.
42. What happens when magnesium burns in air?
43. What is an element?
Section G – Short Answer Questions
44. Why are metals used for making cooking vessels?
45. Why are screwdriver handles often covered with plastic?
46. Why is copper commonly used for electrical wires?
47. Why does iron rust faster in moist air?
48. Why is sodium stored in kerosene?
49. Why are non-metals also important in our daily life?
Section H – Reasoning Questions
50. An iron nail is kept in a completely dry bottle. Another nail is kept in a bottle
where both air and water are present. Which nail is expected to rust? Give a reason.
51. A student says, “All materials that are hard are metals.” Is this statement correct? Give examples to support your answer.
52. Why can copper be used to make both electrical wires and cooking vessels?
53. A piece of sulfur is hammered and breaks into pieces. Which property of sulfur does this observation show?
54. Why can a metal be useful for making a bell?
Section I – Application Based Questions
55. Riya wants to make a thin sheet for wrapping food. She has copper, aluminium,
wood and sulfur. Which material should she choose? Why?
56. A mechanic wants a material that can be made into a long wire for an electrical connection.
Which property should the material have?
57. A school gate made of iron is exposed to rain for many years. What change may appear on it?
How can the change be reduced?
58. A cooking pan has a metal body but a handle made of wood or another poor conductor.
Why is this design useful?
Section J – Observe and Think
Observe the metal structure and think about corrosion.
59. The Iron Pillar of Delhi has remained remarkably resistant to rust for a very long time.
Which chapter concept is connected with this observation?
Observe the bright flame produced when magnesium burns.
60. What new substance is formed when magnesium burns in oxygen?
Section K – Case Study
Read the case carefully:
A science teacher gives four objects to a group of students: a copper wire, a rubber strip, an aluminium foil and a piece of sulfur. The students test their appearance, ability to be beaten, and ability to conduct electricity.
61. Which objects are expected to be good electrical conductors?
62. Which object is expected to be brittle?
63. Which object can be drawn into a wire?
64. Which object can be beaten into a thin sheet?
Section L – HOTS Questions
65. A student says, “A metal must always be hard and solid.”
Do you agree? Explain using examples.
66. Gold is used for jewellery even though it is a metal. Which properties make it suitable?
67. Why is it not enough to say that a material is simply “hard” or “soft”
when deciding whether it is a metal or non-metal?
68. Explain why the properties of a material are important when selecting it for a particular use.
Give two examples.
Answer Key
Section A – MCQs
| Q. | Answer |
|---|---|
| 1 | (b) Malleability |
| 2 | (c) Copper |
| 3 | (b) Sonority |
| 4 | (b) Mercury |
| 5 | (d) Sulfur |
| 6 | (c) Iron |
| 7 | (b) Air and water |
| 8 | (c) Sulfur |
| 9 | (b) Oxygen |
| 10 | (a) Copper |
Section B – Fill in the Blanks
| Q. | Answer |
|---|---|
| 11 | Malleability |
| 12 | Ductility |
| 13 | Ringing |
| 14 | Rust |
| 15 | Rusting |
| 16 | Element |
| 17 | Galvanisation |
| 18 | Sulfurous |
Section C – True or False
| Q. | Answer |
|---|---|
| 19 | True |
| 20 | False |
| 21 | True |
| 22 | False |
| 23 | True |
| 24 | False |
| 25 | True |
| 26 | False |
Section D – Match the Following
| Q. | Answer |
|---|---|
| 27 | B |
| 28 | D |
| 29 | E |
| 30 | C |
| 31 | A |
Section E – Identify the Material
| Q. | Answer |
|---|---|
| 32 | Aluminium |
| 33 | Sulfur |
| 34 | Sodium |
| 35 | Mercury |
| 36 | Oxygen |
Section F – Very Short Answers
| Q. | Answer |
|---|---|
| 37 | The shiny appearance generally shown by metals. |
| 38 | Gold and silver. |
| 39 | Copper and aluminium. |
| 40 | The brown deposit formed on iron when it reacts with air and water. |
| 41 | Painting and oiling. Other correct methods include greasing and galvanisation. |
| 42 | It burns with a dazzling white flame and forms magnesium oxide. |
| 43 | A substance that cannot be broken down into simpler substances. |
Section G – Short Answers
| Q. | Key Points |
|---|---|
| 44 | Metals are generally good conductors of heat. |
| 45 | Plastic is a poor conductor of electricity and helps protect against electric shock. |
| 46 | Copper is ductile and a good conductor of electricity. |
| 47 | Rusting requires both air and water; moist air provides both. |
| 48 | Sodium reacts vigorously with air and water, so kerosene prevents contact with them. |
| 49 | Non-metals such as oxygen, nitrogen, chlorine and iodine have important uses in life. |
Section H – Reasoning
| Q. | Key Answer |
|---|---|
| 50 | The nail exposed to both air and water will rust because both are needed for ordinary rusting. |
| 51 | No. Hardness alone does not identify a metal. Some non-metal materials can also be hard. |
| 52 | Copper is a good conductor of electricity and heat. |
| 53 | Sulfur is brittle. |
| 54 | Metals are sonorous and produce a ringing sound when struck. |
Section I – Application Based
| Q. | Key Answer |
|---|---|
| 55 | Aluminium, because it is malleable and can be made into thin sheets. |
| 56 | Ductility. |
| 57 | Rust may form. Painting, oiling, greasing or galvanisation can reduce rusting. |
| 58 | The metal body transfers heat, while the poor-conducting handle reduces heat reaching the hand. |
Section J – Observe and Think
| Q. | Answer |
|---|---|
| 59 | Corrosion and resistance to rusting. |
| 60 | Magnesium oxide. |
Section K – Case Study
| Q. | Answer |
|---|---|
| 61 | Copper wire and aluminium foil. |
| 62 | Sulfur. |
| 63 | Copper wire. |
| 64 | Aluminium foil. |
Section L – HOTS
| Q. | Key Points |
|---|---|
| 65 | No. Mercury is a liquid metal at room temperature, while sodium and potassium are very soft metals. |
| 66 | Gold is lustrous, highly malleable and highly ductile, so it can be shaped into attractive jewellery. |
| 67 | Materials have many properties. Metals and non-metals are identified using properties such as lustre, malleability, ductility, sonority and conductivity. |
| 68 | The properties decide the suitable use. For example, copper is used for wires because it conducts electricity, while aluminium is used for sheets because it is malleable. |
Class 7 Science The World of Metals and Non-metals WorksheetThe World of Metals and Non-metals WorksheetClass 7 Science Chapter 4 Practice WorksheetClass 7 Science Curiosity WorksheetNCERT Class 7 Science WorksheetClass 7 Science Chapter 4 QuestionsThe World of Metals and Non-metals Class 7 QuestionsClass 7 Science Worksheet with AnswersClass 7 Science Revision WorksheetNCERT Curiosity Chapter 4 Worksheet