NCERT Class VI Science Solutions: Chapter 4 – Fibre to Fabric Part 3 (For CBSE, ICSE, IAS, NET, NRA 2022)

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Question 14:

On a bright sunny day. Shikha was playing hide and seek with her brother. She hide herself behind a glass door. Do you think her brother will be able to locate her? If yes. Why? If no. why not?

Answer:

If glass is transparent, her brother able to see her behind the glass door.

If glass is translucent, her brother able to see her behind the glass door in form of shadow.

If glass is opaque, her brother not able to see her.

Image Result for Difference between Opaque, Transparent and …

Question 15:

Take a small cotton ball and place it in a tumbler/bowl filled with water. Observe it for at least 10 minutes. Will it float or sink in water and why?

Answer:

Cotton ball initially floats and then sinks as it absorbs water.

SHORT ANSWER QUESTIONS

Question 16:

Which among the following materials would you identify as soft materials and why?

Ice, rubber band, leaf, eraser, pencil, pearl, a piece of wooden board, cooked lice, pulses and fresh chapati.

Answer:

Rubber band, leaf, eraser, cooked rice and fresh chapati are soft materials because they can be compressed or scratched easily.

Question 17:

You are provided with the following materials - turmeric, honey, mustard oil, water, glucose, rice flour, groundnut oil.

Make any three pairs of substances where one substance is soluble in the other and any three pairs of substances where one substance remains insoluble in the other substances.

Answer:

Soluble:

  1. Honey in water.
  2. Glucose in water.
  3. Groundnut oil in mustard oil.

Insoluble:

  1. Turmeric in water.
  2. Rice flour in water.
  3. Mustard oil in water.

Question 18:

During summer holidays, a group of children collected a lump of salt, green grass, broken glass piece, a small thermocol box, pen, iron nail, glass marbles, hair, naphthalene ball, a piece of sugar candy (mishri) and tried to group them on the basis of properties given in Table below. Help them in filling the Table.

Filling the Table (Q)
Name of the materialAppearance (Hard/Soft)Transparency (Transparent/Translucent/Opaque)Floats/Sinks in waterSoluble/Insoluble in water

Answer:

Filling the Table (A)
Name of the materialAppearance (Hard/Soft)Transparency (Transparent/Translucent/Opaque)Floats/Sinks in waterSoluble/Insoluble in water
Lump of saltHardOpaqueSinksSoluble
Green grassSoftOpaqueFloatsInsoluble
Broken Glass PieceHardTransparentSinksInsoluble
A small thermocol boxSoftOpaqueFloatsInsoluble
PenHardOpaqueSinksInsoluble
Iron NailsHardOpaqueSinksInsoluble
Glass marblesHardTransparentSinksInsoluble
HairSoftOpaqueFloatsInsoluble
Naphthalene ballHardOpaqueSinksInsoluble
A piece of sugar candy (mishri)HardTranslucentSinksSoluble

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