Extra Questions for Chapter 6 Materials Around Us Class 6 Science Curiosity
Class 6 Science Materials Around Us Extra Questions
Multiple Choice Questions (MCQ)
Question 1. Which of the following materials is used for making windows?
(a) Wood
(b) Plastic
(c) Glass
(d) Metal
Answer
(c) Glass
Question 2. What is the property of materials that determines whether they can be compressed?
(a) Hardness
(b) Solubility
(c) Lustrous
(d) Density
Answer
(a) Hardness
Question 3. Which of the following materials is classified as non-lustrous?
(a) Copper
(b) Paper
(c) Aluminium
(d) Gold
Answer
(b) Paper
Question 4. Which material can be described as opaque?
(a) Water
(b) Glass
(c) Wood
(d) Air
Answer
(c) Wood
Question 5. In which state of matter does the material have a defined volume but no defined shape?
(a) Solid
(b) Liquid
(c) Gas
(d) Plasma
Answer
(b) Liquid
Fill in the Blanks
1. Materials that allow light to pass through are called ____.
Q2: The process of arranging materials or objects based on common properties is called __________.
Q3: __________ materials do not dissolve in water.
Q4: The unit of mass in the International System of Units (SI) is __________.
Q5: A common property of metals is that they are usually __________.
Answer
1. transparent
2. classification
3. Insoluble
4. kilogram
5. lustrous
True or False
Q1: All shiny materials are metals.
Q2: Wood is an example of a transparent material.
Q3: Plastic can be used to make a variety of objects.
Q4: Lustrous materials can lose their shine when exposed to air.
Q5: The volume of a liquid is usually measured in grams.
Answer
1. False
2. False
3. True
4. True
5. False
Match the Following
Question 1.
|
Column A |
Column B |
|
1) Paper |
A) Transparent |
|
2) Wood |
B) Opaque |
|
3) Glass |
C) Lustrous |
|
4) Metal |
D) Non-lustrous |
|
5) Water |
E) Transparent |
Answer
|
Column A |
Column B |
|
1) Paper |
D) Non-lustrous |
|
2) Wood |
B) Opaque |
|
3) Glass |
A) Transparent |
|
4) Metal |
C) Lustrous |
|
5) Water |
E) Transparent |
Question 2.
|
Column A |
Column B |
|
(a) Surgical instruments |
(i) Plastic |
|
(b) Newspaper |
(ii) Animal product |
|
(c) Electrical switches |
(iii) Steel |
|
(d) Wool |
(iv) Plant product |
Answer
|
Column A |
Column B |
|
(a) Surgical instruments |
(iii) Steel |
|
(b) Newspaper |
(iv) Plant product |
|
(c) Electrical switches |
(i) Plastic |
|
(d) Wool |
(ii) Animal product |
One Word Answer
Question 1. Which material is used for making furniture?
Answer
Wood
Question 3. What type of pottery was developed in the Sindhu-Sarasvati region around 4000 BCE?
Answer
Wheel-turned pottery
Question 4. Name a property that can be used to group materials.
Answer
Hardness
Question 5. Name an example of a translucent material.
Answer
Frosted glass
Question 6. What type of material is used for making windows?
Answer
Glass
Question 7. What is the SI unit for volume?
Answer
cubic meter (m³).
Question 8. Give an example of a lustrous material.
Answer
Gold
Question 9. What is the unit of mass?
Answer
kilogram (kg)
Question 10. What is the process of arranging objects into groups called?
Answer
Classification
Question 11. Name two materials that are commonly used for making transparent objects.
Answer
Glass and clear plastic
Very Short Answer Questions
Question 1. What is a material?
Answer
A material is a substance used to make an object.
Question 2. What is the main characteristic of opaque materials?
Answer
They do not allow light to pass through.
Question 3. Can rubber be considered a hard material?
Answer
No, rubber is considered soft relative to metals.
Question 4. What is matter?
Answer
Matter is anything that takes up space and has weight.
Question 5. What is an opaque material? Provide an example.
Answer
An opaque material is one through which you cannot see at all. An example is wood.
Question 6. What are soluble materials?
Answer
Soluble materials can dissolve in water, like sugar and salt.
Question 7. Define the term 'lustrous.'
Answer
Lustrous refers to materials that have a shiny surface, like metals such as iron, copper, and gold.
Question 8. What is an example of an insoluble material?
Answer
Sand is an example of an insoluble material.
Question 9. What does volume measure?
Answer
Volume measures the amount of space an object occupies.
Question 10. How is the volume of a liquid typically measured?
Answer
The volume of a liquid is usually measured in liters (L) or milliliters (mL).
Question 11. Why can’t a tumbler made of cloth be used to store water?
Answer
A tumbler made of cloth cannot be used to store water because cloth is not waterproof and will allow the water to seep through.
Question 12. What happens when you mix oil and water?
Answer
Oil forms a separate layer on top of water because it is less dense.
Question 13. What is ORS used for?
Answer
ORS is used to treat dehydration caused by diarrhoea or illnesses.
Question 14. What is a material?
Answer
A material is any substance that is used to create an object, such as wood, metal, plastic, or glass.
Question 15. What happens when sugar is mixed with water?
Answer
When sugar is mixed with water, it dissolves completely, making the solution clear.
Short Answer Questions
Question 1. Write two advantages of grouping materials.
Answer
(i) It helps to locate the objects easily.
(ii) It makes easy to study the properties of materials.
Question 2. What is the basis for sorting materials?
Answer
Materials are grouped on the basis of similarities or dissimilarities in their properties.
Question 3. Kerosene, coconut oil, mustard oil do not dissolve in water, even on shaking. They separate after sometime forming two different layer. Explain why.
Answer
The molecules of water do not intermingle (mix) with the molecules of oil. The space between the molecules of water is not taken by oil, so they are immiscible in water.
Question 5. What is the significance of classifying materials based on their properties?
Answer
Classifying materials based on their properties helps in understanding their uses, similarities, and differences, which makes it easier to study and utilize them effectively.
Question 6. Write any four properties of materials.
Answer
- Appearance
- Hardness
- Solubility
- Transparency
Question 7. What is the difference between transparent and translucent materials?
Answer
Transparent materials allow light to pass through them clearly, making objects behind them visible, while translucent materials allow some light to pass through, but objects are not seen clearly.
Question 8. Metals have lustre (shine). Give reason why some metal articles become dull and loose their shine.
Answer
Metals when exposed to air react with moisture and gases present in it, thereby forming a dull layer of some other compound on it.
Long Answer Questions
Question 1. Observe the following figure and answer the questions.
(i) Why should we not use a tumbler made of cloth?
(ii) What inference can we draw from it?
Answer
(i) Tumbler made of cloth cannot hold water.
(ii) We should choose a material to make an object depending on its properties and the purpose for which the object is to be used.
Question 2. In the context of materials, what does the term 'soluble in water' mean?
Answer
In the context of materials, 'soluble in water' means that a material can dissolve completely when mixed with water. This means the material disappears and forms a solution with the water, so you can no longer see the individual particles of the material. For example, when salt is added to water, it dissolves, making a saltwater solution.
Question 3. How can you show that some solids like sugar and salt are soluble in water whereas solids like chalk powder and sand are not soluble in water?
Answer
Collect samples of sugar, salt, chalk powder and sand. Take four beakers. Fill each one of them about two-third with water. Add a teaspoonful of sugar to the first beaker, salt to the second, chalk powder to the third and sand to the fourth. Stir the contents of each beaker with a spoon/stirrer.
Wait for a few minutes and observe what happens to the substances added to the water.
(a) The solid substance is visible in water and hence insoluble (chalk powder and sand),
(b) The solid is not visible in water and hence soluble (sugar and salt). Note down your observations in the following table.
Question 4. Given below are the names of some objects and materials:
Water, basket ball, orange, sugar, globe, apple and earthen pitcher Group them as:
(a) Round shaped and other shapes
(b) Eatables and non-eatables
Answer
(a) (i) Round shaped: Basket ball, apple, orange, globe and earthen pitcher.
(ii) Other shapes: Water and sugar.
(b) (i) Eatables: Water, orange, sugar and apple.
(ii) Non-eatables: Basket ball, globe and earthen pitcher.