CBSE Class 6 Science Sorting materials into Groups Assignment Set 01

L-4 Sorting Materials into Groups

Question 1. Draw 5 objects made from plastic?
Answer: Five common objects made from plastic are:
1. Plastic water bottle
2. Plastic bucket
3. Plastic comb
4. Plastic toothbrush
5. Plastic lunch box
In simple words: Plastic is a versatile material used to make many daily household items because it can be easily molded into different shapes.

Exam Tip: Always choose items that are entirely or primarily made of plastic, such as mugs, combs, or toys.

Question 2. Fillup the following:
1. Material which can be compressed or scratched easily are called soft.
2. Material which are difficult to compress are called hard.
3. Iron and copper have lustre (shine) on their surface after rubbing with sand paper.
4. Glass (or Plastic) is man made transparent substance / object.
5. Sand (or Wood / Stone) does not mix in water.
6. Wood and metal (or stone/cardboard) are opaque.
Answer: 1. soft, 2. hard, 3. lustre, 4. Glass, 5. Sand, 6. Wood, metal
In simple words: These blanks test fundamental physical properties of materials like hardness, solubility, luster, and transparency.

Exam Tip: Memorize key terms related to material properties such as solubility, transparency, and hardness to answer fill-in-the-blanks accurately.

Question 3. Mention the objects against each shape (at least two) -
Shape -- Objects
1. Circle (Sphere / Circular disc): Coin, Bangle, Ball, Plate
2. Rectangle: Book, Scale (Ruler), Notebook, Brick
3. Square: Carom board, Chess board, Wall tile, Handkerchief
4. Cone: Ice cream cone, Funnel, Birthday cap
Answer: 1. Circle: Coin, Bangle
2. Rectangle: Book, Scale
3. Square: Chess board, Handkerchief
4. Cone: Ice cream cone, Funnel
In simple words: Common everyday objects can be classified based on their geometric shapes.

Exam Tip: Ensure you provide at least two distinct examples for every shape mentioned in the question.

Question 4. Define Transparent objects with examples?
Answer: Those substances or materials through which things can be seen are called transparent objects. Light can pass through them completely.
Examples: Glass, water, air, and some plastics.
In simple words: Transparent objects let light pass straight through so you can see clearly through them, like a clean glass window.

Exam Tip: Mention both the scientific reason (light passes through) and common examples to get full marks.

Question 5. Define opaque objects with examples?
Answer: Those substances and materials through which you are not able to see at all are called opaque objects. They do not allow light to pass through them.
Examples: Wood, cardboard, metals, and stone.
In simple words: Opaque objects block light completely, so you cannot see through them at all, like a wooden door.

Exam Tip: Keep the definition concise and contrast it with transparent and translucent materials for clarity.

Question 6. Define translucent objects with examples?
Answer: The materials through which objects can be seen, but not clearly, are called translucent objects. They allow only a fraction of light to pass through them.
Examples: Butter paper, oiled paper, frosted glass, and thin plastic sheets.
In simple words: Translucent objects let some light pass through, making things on the other side look blurry or hazy.

Question 7. Match the following -
Column I      Column II
a. Soluble      Sugar
b. Hard      Pencil
c. Insoluble      Sand
d. Lustre      Silver
e. Rough      Sand paper
f. Soft      Wool
Answer:
- (a) Soluble - Sugar
- (b) Hard - Pencil
- (c) Insoluble - Sand
- (d) Lustre - Silver
- (e) Rough - Sand paper
- (f) Soft - Wool
In simple words: Matching properties with the correct substance helps identify how materials behave in daily life.

Exam Tip: Draw clear lines or write the correct corresponding pairs side by side to avoid confusion during evaluation.

Question 8. Name three substances which dissolve in water?
Answer: Three substances that dissolve in water are:
1. Sugar
2. Salt (Common salt / Sodium chloride)
3. Glucose powder
In simple words: Substances that dissolve completely in water are called soluble substances.

Exam Tip: Common household items like salt and sugar are the best and most universally accepted examples.

Question 9. Name three substances which float on water?
Answer: Three substances that float on water are:
1. Dry wood / Wooden block
2. Plastic ball / Plastic bottle
3. Dry leaves (or wax / thermocol)
In simple words: Objects that are lighter than water or trap air inside them usually float on the surface.

Exam Tip: Mention light objects that do not absorb water easily, such as plastic or dry wood.

Q.No.1 Fill in the blanks:

1. The liquid that completely mix with each other make a___________ solution.

2. Sand is ___________________ in water.

3. Water is a ___________________ solvent.

4. Sorting of things is done on the basis of their

_______________________ properties.

5. Mass per unit volume is ______________________.

Q.No.2 Define the following:

a) Transparency b) Solution

Q.No.3 Give three differences between the following:

a) Solute and Solvent

b) Metal and Non-metals.

Q.No.4 How can you prepare any?

a) Soluble Solution.

b) Insoluble Solution.

Q.No.5 Mention some of the properties on which materials can be classified.