Science STD 6 Chapter 2: Sorting Materials into Groups - Exercises

Science STD 6 Chapter 2: Sorting Materials into Groups - Exercises

1. Name five objects which can be made from wood.

Five objects that can be made from wood are: chair, table, plough, bullock cart, and doors.

2. Select those objects from the following which shine: Glass bowl, plastic toy, steel spoon, cotton shirt.

The objects that shine are: glass bowl and steel spoon.

3. Match the objects given below with the materials from which they could be made.

Objects Materials
Book Paper
Tumbler Glass, Plastics
Chair Wood, Plastics
Toy Plastics, Wood, Glass
Shoes Leather, Plastics

4. State whether the statements given below are True or False.

  1. Stone is transparent, while glass is opaque.

    False.

  2. A notebook has lustre while an eraser does not.

    False.

  3. Chalk dissolves in water.

    False.

  4. A piece of wood floats on water.

    True.

  5. Sugar does not dissolve in water.

    False.

  6. Oil mixes with water.

    False.

  7. Sand settles down in water.

    True.

  8. Vinegar dissolves in water.

    True.

5. Given below are the names of some objects and materials: Water, basket ball, orange, sugar, globe, apple and earthen pitcher. Group them as:

  1. Round shaped and other shapes

    Round shaped: Basket ball, orange, globe, apple, earthen pitcher.

    Other shapes: Water, sugar.

  2. Eatables and non-eatables

    Eatables: Water, orange, sugar, apple.

    Non-eatables: Basket ball, globe, earthen pitcher.

6. List all items known to you that float on water. Check and see if they will float on an oil or kerosene.

Items that typically float on water include a piece of wood, dry leaves, a plastic bottle, a cork, and a feather. Their behavior in oil or kerosene would depend on their density relative to that specific liquid. Materials with a lower density than the liquid will float.

7. Find the odd one out from the following:

  1. Chair, Bed, Table, Baby, Cupboard

    Baby (The rest are non-living objects made of wood.)

  2. Rose, Jasmine, Boat, Marigold, Lotus

    Boat (The rest are flowers.)

  3. Aluminium, Iron, Copper, Silver, Sand

    Sand (The rest are metals.)

  4. Sugar, Salt, Sand, Copper sulphate

    Sand (The rest are soluble in water.)

Suggested Activities

1. You may have played a memory game with your friends... Play this game, with a difference! Ask all the participants in the game to remember objects with some particular property...

Outline: This activity uses a memory game format to reinforce the concept of classifying objects based on their properties. By asking players to remember objects made of a specific material (like wood) or with a certain property (like being edible), it encourages them to think about how objects are grouped. The answer is the act of playing the game itself, which helps students understand categorization in a fun way.

2. From a large collection of materials, make groups of objects having different properties like transparency, solubility in water and other properties.

Outline: This activity is a hands-on experiment to practice sorting. Students would need to collect various materials and then test them for properties like transparency (using a light source), solubility (by mixing with water), and hardness (by trying to scratch them). The answer is the creation of groups or lists of materials based on these observations, demonstrating an understanding of material properties and grouping.