NCERT Class VI Science Solutions: Chapter 4-Sorting Materials into Group Part 2

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NCERT Class 6 Science Chapter 4: Sorting Material into Groups

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Diagram shows Properties of Materials

Properties of Materials

Question 4:

State whether the statements given below are True or False.

  1. Stone is transparent, while glass is opaque.

  2. A notebook has luster while eraser does not.

  3. Chalk dissolves in water.

  4. A piece of wood floats on water.

  5. Sugar does not dissolve in water.

  6. Oil mixes with water.

  7. Sand settles down in water.

  8. Vinegar dissolves in water.

Answer:

  1. Stone is transparent, while glass is opaque. (False)

  2. A notebook has luster while 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)

Question 5:

Given below are the names of some objects and materials:

Water, basketball, orange, sugar, globe, apple and earthen pitcher Group them as:

(a) Round shaped and other shapes

(b) Eatables and non-eatables

Answer:

  1. Round shaped : Basketball, orange, globe, apple and earthen pitcher

Other shapes: Water and sugar

  1. Eatables : Water, orange, sugar and apple

Non eatables: Basketball, globe and earthen pitcher

Question 6:

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

Answer

Wooden block, Paper, Balloon, Hair, plastic bottle, wooden logs, Boat etc. will float on water. A few of these like hair, balloon can float on kerosene or oil. Generally, substances have less density than oil and water can float.

For example, few types of wood have densities higher than oil but less than water, so it floats on water but not on kerosene.

Question 7:

Find the odd one out from the following:

Chair, Bed, Table, Baby, Cupboard

Rose, Jasmine, Boat, Marigold, Lotus

Aluminium, Iron, Copper, Silver, Sand

Sugar, Salt, Sand, Copper sulphate

Answer

Baby: Rest others are made up of wood and are non – living things.

Boat: Rest others are flowers.

Sand: Rest others are metals.

Sand: Rest others are in crystal forms

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