Rajasthan Board Class 8th Model Question Paper 2023 Science

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(Model Question Paper)
/ Class
/subject (science)

Nylon is used in –
(a) To make clothes (b) To make ropes and tents
(C) To make toothbrushes (d) All of the above

Less polluting fuel for vehicles is –
(a) Diesel (b) Compressed Natural Gas (CNG)
(C) Petrol (d) Liquid Petroleum Gas (LPG)

Which part of flame do goldsmiths use to melt Gold and Silver –
(a) Outer zone of flame (b) Middle zone of the flame
(c) Inner most zone of flame (d) None of the above

(T) (F)
Write True (T) or False (F) for following statements.

Fertilised egg is called zygote.

Height increases during adolescence.

I you are out of house and an earth quake strikes, you will enter the house.

If fire breaks out around your home then what would you do to control fire? Write
/Ans. ____________________________________________________________

_______________________________________________________________________

Write an example of external fertilisation.
/Ans. ____________________________________________________________

______________________________________________________________________

Write the name of male harmone.
/Ans. ____________________________________________________________

_______________________________________________________________________

Draw a diagram of two clouds showing ions.
/Ans

Jupiter is the largest planet of the solar system. Draw its diagram.
/Ans

Draw the diagram of Nitrogen cycle.
/Ans

What type of clothes you will suggest to your friend to buy for winters? Write four
reasons.

1.________________________________________________________

2.________________________________________________________

3.________________________________________________________

4.________________________________________________________

A
B
C
D

Various constituents of petroleum and their uses are shown in the table given below.
Match group I with group II
Group I Group II
S.N. Constituents of petroleum Uses
1 Liquid Petroleum Gas A Paints. Road surface
(LPG)
2 Diesel B Ointments, Candles, Vaseline etc.
3 Paraffin wax C Fuel for Heavy Motors
4 Bitumen D Vehicles, electric general

1._________________________________________________________

2._________________________________________________________

3._________________________________________________________

4._________________________________________________________

(√)
1X4 = 4
Check the correctness of the sentences given below and mark True (T) or False (F).

Rainfall rate is not affected by deforestation. (True /False )

Wildlife sanctuary is an area where wild animals remain safe and protected.

Endangered animals are those animals whose numbers are diminishing below certain level.
. (True /False)

Gradually the fertile land gets converted into deserts. It is called desertification.
2+2=4
Draw labelled diagram of plant cell and animal cell.

2+2=4
Write the definition and formula of pressure.
/Ans___________________________________________________________________

Which type of footware will you use if you need to walk/run on smooth surface? Write.

/Ans___________________________________________________________________

__________________________________________________________________________

2+2=4

Write two differences between noise and music.

(i)_________________________________________________________________________

(ii)__________________________________________________________________________

Draw a labelled diagram of simple circuit showing electroplating.
/Ans

2+2=4
We get multiple types of informations from artificial satellite. Write any two of them.
(i)_________________________________________________________________________

(ii)__________________________________________________________________________

You want to store wheat in your house. What preparations will you do for it? Write.

/Ans____________________________________________________________________

____________________________________________________________________________-

/ Or

1+5=6
Which method of irrigation will you use in water deficient area? Draw a diagram of method
of irrigation.
/Ans

___________________________________________________________________________

_______________________________________________________________________

11/2 + 11/2 +11/2 + 11/2 = 6
State four differences between metals and non-metals on the basis of their properties.

/ Metals /Non Metals
/S.N.

/ Or

I II

In the given table, in column I metal names are given. Write the uses of given metals in front of
them in column II

/ I /Column I II /Column II
S.No. / Metals /Uses
/Gold

/Copper

/Iron

/Mercury

4+2=6
Draw a labelled diagram of human eye.

Which two questions will you ask to the traffic police regarding road safety?

(i)___________________________________________________________________________

(ii)__________________________________________________________________________

/Or

Explain with the help of a diagram that the angle of incidence is equal to angle of reflection.

If your father has to drive in fog, which two questions will you ask him for road safety?
Write.

(i)_____________________________________________________________________

___________________________________________________________________________

(ii)__________________________________________________________________________

___________________________________________________________________________

4+2=6
How would you recognize drinking water and impure water?
/Ans. __________________________________________________________________

Write two of your favorite hygiene habits.
(i)___________________________________________________________________________

(ii)__________________________________________________________________________

/ Or

Differentiate between pure air and impure air.

What will you do to keep your surroundings clean?