CHAPTER: Solids, Liquids, Gases Class 5

 1. What is matter?

Ans: Anything that has mass and occupies space is called matter.

2. What are molecules?

Ans: Matter is made of tiny particles called molecules.

3. How many states of matter?

Ans: 3 states of matter are solid (Ice), liquid ( Water), gas ( Water vapour).

4. Write the basic properties of solids?

Ans: Properties of solids

         i) Fixed shape and size.

        ii) Can not flow.

       iii) Definite volume.

       iv) Hard and rigid.

        v) Molecules are tightly packed.

5. Write the basic properties of liquid?

Ans: Properties of liquid

        i) Molecules are loosely packed.

       ii) Fixed volume.

      iii) Do not have fixed shape.

      iv) Can flow.

6. Write the basic properties of gases?

Ans: Properties of gases

        i) Molecules are very loosely packed.

       ii) Do not have definite shape.

      iii) Can flow. (Blow)

      iv) Often invisible.

7. Write down the difference between solid and liquid.

Ans: 

Solid	Liquid
Molecules are tightly packed	Molecules are loosely packed
Can not flow	Can flow
Have fixed shape	Do not have fixed shape
Hard and rigid	Less very rigid

8. How does states of matter change?

Ans: Matter is changed from one state to another on heating and cooling.

           

9. What is melting?

Ans: The change of solid into liquid on heating is called melting.

         Example:- Ice --- Water

10. What is evaporation?

Ans: The change of  liquid into gas on heating is called evaporation.

         Example:- Water ---- Water vapour ( Water boils at 100 degree C)

11. What is condensation?

Ans: The change of gas into liquid on cooling is called condensation.

         Example:- Water vapour ---- Water

12. What is freezing?

Ans: The change of liquid into solid on cooling is called freezing.

         Example:- Water ---- Ice ( Water freezes at 0 degree C)

         

13. What is solution?

Ans: Solution is a mixture of solute and solvent.

         Example:- Water ( Solvent) + Sugar ( Solute) = Sweet water ( Solution)

14. Write all types of solutions with examples.

Ans: 1) Solid and liquid. (Sugar + Water )

        2) Liquid and liquid. ( Milk + Water)

        3) Gas and liquid. ( Carbon- dioxide + Water = Soda water)

       4) Gas and gas ( Air)

15. Write the method of separation.

Ans: Separation Method

        i) Sedimentation and decantation

       ii) Filtration

      iii) Evaporation

      iv) Distillation

16. What is sediments?

Ans: Which impurities settle down during sedimentation at the bottom is called sediments.

17. What is filtration?

Ans: The process of separating suspended solid from impure liquid (water) through a filter paper is called filtration.

18. Write the difference between filtration and evaporation.

Ans: 

Filtration	Evaporation
Insoluble solids from liquids	Soluble solids from liquids
No need heat	Need heat

19. Write the components of air.

Ans: Components of air are Nitrogen 78%, Oxygen 20%, Carbon-dioxide 0.03%, and other gasses ( Argon, Hydrogen, Helium, etc)

Note: Oxygen help to survive and burn.

           Nitrogen does not support burning.

           Carbon - dioxide help to off burn.

           Hydrogen burns itself.

           Argon use to make light (bulbs).

20. Write the properties of air.

Ans: Properties are 

        i) has mass (weight).

       ii) occupies space.

      iii) give pressure.

      iv) hot air rises up.

21. Write the difference between sea breeze and land breeze.

Ans:

Sea breeze	Land breeze
Occur day time	Occur night time
Blow from sea to land	Blow from land to sea

22. Write the functions of ventilation.

Ans: Circulation of fresh air in an enclosed space is called ventilation.

23. Why is the ventilator made on top of the room?

Ans: Hot air in the room is lighter and goes up, easily out from the room through the ventilator so it is kept on top of the room.

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