std 4 EVS SCERT [Lesson 7 As stone.....As wind]



Lesson 7

As Stone....As wind

1st day[22/2/2021]


1.Write the name of some objects around us.


*Stone

water

ball

milk

ice.......etc


2.Write the common properties of matter.


*They have weight

They occupy space.


3.Observe the picture. Which among the following can flow like water? Colour them. 

Do this page 74



4. Find out other liquids  


*water

petrol

milk

oil..etc


5.write down the common properties of liquids.



.It can flow

. It do not have a definite shape. It take the shape of container.

. It need space to occupy.

. It have weight

.It have surface


2nd and 3rd day


6.write down the common properties of solid

*

.It can't flow

. It have definite shape

.It need space to occupy

.It have weight

.It have surface


7.write down common properties of gas



*

.It can flow

. It do not have a definite shape. It take the size of the container

.It need space to occupy

.It have weight

.It have not surface

8.write down the similarities and differences of solid, liquid and gas


*


9.Name the four states of matter around us.

*There are 4 states of matter. They are solid, liquid, gas and plasma

10.Examples of solid, liquid, gas and plasma.



11.Describe about three states of water.

*



11.what is wind?


*Moving air is wind


12 .why do we sense the fragrance of the incense stick?


*A property of air which helps you smell the fragrance of the incense stick is it freely flows.


13.Liquids and gases exert pressure equally in all directions.


14.Liquids and gases exert pressure equally in all directions. write the name of some devices that use this property ?


*Water sprinkler,

balloon rocket


15.Flowing water and air has power.


16.Flowing water and air has power.write the names of some devices that use this property?


*pin-wheel, windmill, waterwheel


17.An example of matter in plasma state is  -----


*flame 


18.complete the table [Page 82]






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