4th Science Guide Term 1 Lesson 2 Matter and Materials

Kalvi 4th Science Solutions Term 1 Chapter 2 Matter and Materials

4th Standard Science Term 1 Lesson 2 Matter and Materials Book Back Question and Answers Download PDf. 4th Science Term 1 English Medium Book in answers. 4th All Subject Book Back Answers. 

4th Science Guide Matter and Materials Text Book Back Questions and Answers

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Samacheer Kalvi 4th Science Guide  Matter and Materials Text Book Back Questions and Answers

4th Science Guide Term 1 Chapter 2 Matter and Materials

I. Pick out the odd one :

Question 1.

brick, coir, silk cloth, pine apple

Answer:Silk cloth

Question 2.

stone, rubber band, cycle tube, electric wire

Answer:Stone

Question 3.

sun, candle, torch, pen

Answer:Pen

Question 4.

umbrella, sponge, rain coat, jerkin

Answer:Sponge

Question 5.

glass bottle, exam pad, paper plate, wooden board

Answer:Glass bottle

II. Fill in the Blanks :

Question 1.

Materials which can be compressed or cut easily are called __________.Answer:Soft materials

Question 2.

Gold and diamond are the examples of ___________ materials.Answer:Shiny

Question 3.

Materials which can be bent or stretched easily are called ___________.Answer:Flexible

Question 4.

__________ objects allow all the light to pass through them.Answer:Transparent

Question 5.

___________ is the natural source that stimulates sight and makes thingsAnswer:Light

III. Match the following: (Text Book Page No. 101)

Question 1.

 

Answer:

IV. Say True or False :

Question 1.

We cannot compress, cut or bend the rough materials easily.

Answer:False

Question 2.

Dull materials reflect light.

Answer:False

Question 3.

Sand paper is a good example for smooth materials.

Answer:False

Question 4.

Opaque objects do not allow light to pass through them.

Answer:True

Question 5.

Mirrors change the direction of light that fall on them.

Answer:True

 

V. Answer the following questions :

1. When can you say a material is waterproof material?

Answer:

• Materials that do not allow water to pass through them are called water proof material.
• Example: raincoat, aluminium foil of tablet strip.

2. What is a light source?

Answer:

• The objects that give off light are called light source.
• Example: Sun or sources like an electric lamp or a bulb

3. What is the difference between transparent and opaque materials?

Answer:

Transparent materials	Opaque materials
1.      Transparent objects allow the lights to pass through them.	Opaque objects do not allow light to pass through them.
2.      We can see other objects clearly through transparent objects.	We cannot see through opaque objects.
3.      Example: air, glass, pure water.	Example: wood, stone and metals.

 

4. Define reflection.

Answer:

• The bouncing of light by any smooth or polished surface is called

5. Classify the objects given below as transparent, translucent or opaque materials.

• Transparent materials    Translucent materials     Opaque materials

Answer:

(Air, Rock, Water, Aluminium foil, Mirror, Snow, Wooden board, Polythene bag, CD, Oil soaked paper, Glass tumbler and Coloured glass)

Transparent materials	Translucent materials	Opaque materials
Air	Polythene bag Oil	Rock
Water	soaked paper	Aluminium foil
Mirror	–	Snow
Glass tumbler	Coloured glass	Wooden board, CD

Samacheer Kalvi 4th Science Guide  Matter and Materials Intext Questions and Answers

Try to Answer :(Text Book Page No. 95)

Question 1.

Look at the pictures and identify the materials by which they are made of :

(paper, clay, glass, wood, plastic, metal rubber, wax)

 

 

Try to Answer :(Text Book Page No. 96)

Question 1.

Match the objects that are made of same material

Answer:

• 1 (b) 3 (c) 2
• 2 (b) 1 (c) 3
• 3 (b) 2 (c) 1

Try to Answer :(Text Book Page No. 96)

Write whether the given materials are hard or soft.

Question 1.

Try to Answer :(Text Book Page No. 97)

Sort the given objects as rough or smooth.

Question 1.

 

 

Try to Answer :(Text Book Page No. 97)

Text the flexibility.

Give one plastic scale and wooden scale to the students. Ask them to bend. Tabulate their observation (bends, does not

bend).

Question 1.

 

Try to Answer :(Text Book Page No. 99)

Write whether the objects are transparent, translucent or opaque.

Question 1.

I. pick out the odd one :

Question 1.

Rope, Salt paper, Mirror Ball, Wood

Answer:Mirror Ball

Question 2.

glass, raincoat, aluminum foil, tablet strip

Answer:Glass

Question 3.

candle, mirror, silk cloth, tiles

Answer:Candle

Question 4.

stainless steel, foam, gold, diamond

Answer:Foam

II. Say True or False :

Question 1.

A block of wood is opaque.

Answer:True

Question 2.

A clear window is opaque.

Answer:False

Question 3.

Soft materials can be early compressed.

Answer:True

Question 4.

Smooth materials do not have ups and downs

Answer:True

III. Match the following :

Question 1.

1. Vegetable oil – (a) Transparent
2. Glass – (b) Transparent
3. Wood – (c) Waterproof
4. Aluminum foil – (d) Opaque

Answer:

1. b
2. a
3. d
4. c

IV.Choose the correct answer :

Question 1.

Soft material

(a) Rope

(b) Soap

(c) Salt paper

(d) Stone

Answer:(b) Soap

Question 2.      

Which material is transparent?

(a) Glass

(b) White plastic

(c) Coir

(d) Snow

Answer:(a) Glass

Question 3.

An object that blocks all of the light from passing through is

(a) Transparent

(b) Clear

(c) Opaque

(d) Translucent

Answer:(c) Opaque

Question 4.

Which among the following is an example of dull material?

(a) Stainless steel

(b) Gold

(c) Candle

(d) Diamond

Answer:(c) Candle

Question 5.

Materials which have ups and and downs on their surface are called .

(a) Smooth material

(b) Rough material

(c) Shiny material

(d) Hard material

Answer:(b) Rough material

Question 6.

Rubber band is an example of

(a) Rough material

(b) Flexible material

(c) Rigid material

(d) Smooth material

Answer:(b) Flexible material

V. Fill in the blanks :

Question 1.

__________ through which light can pass partially.Answer:Translucent

Question 2.

___________ through which light can pass completely.

Answer:Transparent

Question 3.

____________ through which light cannot pass.Answer:Opaque

Question 4.

Materials which reflect the light well are called ____________Answer:Shiny material

VI. Answer the following questions in one or two sentences :

Question 1.

Name some examples for shiny materials?

Answer:

Materials which reflect the light well are called shiny materials.

Example: Stainless steel, gold and diamond.

Question 2.

What is material?

Answer:

The matter from which a thing is made of is called Material.

For example: Chair is made of wood, Eraser is made of rubber, Candle is made of wax.

 

Question 3.

Differentiate hard and soft materials.

Answer:

Hard materials	Soft materials
1.      Materials which cannot be easily compressed, cut, bent or scratched are called hard materials.	Materials which can be easily compressed, cut, bent or scratched are called soft materials.
2.       Example: Brick, bone and steel.	Example: Foam, clay and skin.

Question 4.

What happens when light hits a transparent object?

Answer:

• Transparent objects allow the light to pass through them.
• So, we can see other objects clearly through Transparent Objects.
• Examples: Air, glass and pure water.

Question 5.

What is Translucent objects? Give an example.

Answer:

• Translucent objects allow some light to pass through them. So, we cannot see objects clearly, but we see them as blurred images through them.
• Examples: Paper soaked in oil, snow and vegetable oil.

Question 6.

What is light sources?

Answer:

• Light may come either from the Sun or from other sources like an electric lamp or a bulb.
• The objects that give off light are called light sources.