Kerala Plus Two Question Paper 2025 Geology

KERALA BOARD

QUESTION
PAPER
2025
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Kerala Board of Public
Examinations

SY-429
Reg. No. : ......................................

Name : ...........................................

SECOND YEAR HIGHER SECONDARY EXAMINATION, MARCH 2025

Part – III Time : 2 Hours
GEOLOGY Cool-off time : 15 Minutes
Maximum : 60 Scores

General Instructions to Candidates :
 There is a ‘Cool-off time’ of 15 minutes in addition to the writing time.
 Use the ‘Cool-off time’ to get familiar with questions and to plan your answers.
 Read questions carefully before answering.
 Read the instructions carefully.
 Calculations, figures and graphs should be shown in the answer sheet itself.
 Malayalam version of the questions is also provided.
 Give equations wherever necessary.
 Electronic devices except non-programmable calculators are not allowed in the
Examination Hall.

 
    15  ‘  ’ .
 ‘  ’    
 .
      .
    .
  , , ,   
.
   .
    .
     
    .

SY-429 1 P.T.O.

SECTION - I

Answer all questions from 1 to 5. Each carries 1 score. (5  1 = 5)

1. Name an ultramafic rock that is composed entirely of olivine.

2. ________ is the highest rank of coal which contain more than 90% of carbon.

3. Fold consist of two sides. Each side of fold is called _______.

4. The process of preserving soft tissues of animals and plants as thin carbon film,
usually in fine grained sedimentary rock (shale) is called ________.

5. Which among the following is an example for renewable resources ?

(Coal, Petroleum, Ground water, Haematite)

SECTION – II

Answer any 6 questions from 6 to 12. Each carries 2 scores. (6 × 2 = 12)

6. (a) If you are living near the seashore and noticed that your well water had a
slightly salty taste, how would you explain the change in water quality ? (1)

(b) What are the two measures that you could take to prevent the above problem ? (1)

SY-429 2

SECTION - I
1  5    . 1  .

(5  1 = 5)
1.      
   .

2.   90%   
  __________ .

3.     .    _________ 
.

4.       
     
  ____________ .

5.        ?
(, , ,  )

SECTION – II
6  12    6  .
2  . (6  2 = 12)

6. (a)       
   
      ? (1)

(b)       

 ? (1)

SY-429 3 P.T.O.

7. Name the following :

(a) A type of deformation in which the deformed object resumes its original shape
and size when the deforming force is removed. (1)

(b) Name the fault in which the angle of the fault plane is low or less than 30
degree. (1)

8. Name two theories regarding the accumulation of plant materials in connection with
the origin of coal.

9. Differentiate between ore and gangue with suitable examples.

10. Define the following terms :

(a) Source Rock (1)

(b) Migration of oil (1)

11. Correct the mistakes in underlined part of the given sentences :

(a) The highest quality of coal is peat. (1)

(b) The actual position of the earthquake origin is epicenter. (1)

12. Explain any two agents of metamorphism.

SY-429 4

7. .

(a)      
   . (1)

(b)     30° 
   . (1)

8.     -
     .  
.

9. ,    .

10.   .

(a)   (1)

(b)   (1)

11.       .

(a)     . (1)

(b)      . (1)

12.     ?

SY-429 5 P.T.O.

Answer any 5 questions from 13 to 18. Each carries 3 scores. (5  3 = 15)

13. Describe the cyclic process by which an igneous rock is transformed into a
metamorphic rock and then into sedimentary rock with a neat diagram.

14. Some mineral based industries are given below :

Fill in the blanks.

Location in the
Name of Industry Minerals used / Extracted
State

Indian Rare Earths Chavara, Kollam (a) __________

Malabar Cements (b) __________ Limestone

Kundara Ceramics Kundara, Kollam (c) __________

15. “Present is the key to the past.” Elaborate the statement.

16. (a) Mention any two significances of fossils in stratigraphy. (1)

(b) Make a comparison between the absolute and the relative ages in geological
event. (2)

17. (a) Explain the difference between P-wave and S-wave in an Earthquake including
their properties and the ways they travel through the Earth’s layers. (2)

(b) List out some of the major effects of the Earthquakes. (1)

18. What do you mean by acid mine drainage ?

SY-429 6

13  18    5  .
3  . (5  3 = 15)
13.      
     .

14.       
.
   /
   
  
,  (a) __________

  (b) __________  
 
,  (c) __________


15. “  .”   .

16. (a)    . (1)

(b)      
   . (2)

17. (a)    - 
 ,    
  . (2)

(b)    . (1)

18.      ?

SY-429 7 P.T.O.

SECTION - III

Answer any 4 questions from 19 to 23. Each carries 4 scores. (4  4 = 16)

19. (a) Resources are broadly classified into renewable and non-renewable resources.
Make a comparison between these two with examples. (2)

(b) “Conservation is the careful use of resources.” Substantiate the statement with
proper examples. (2)

20. Analyse the given table and make a classification of igneous rocks with example
based on the table. Explain.

Silica > 63% Silica between 52 – 63% Silica 45 – 52% Silica < 45%

21. (a) Differentiate between Hazard and Disaster. (3)

(b) List out various phases of Disaster Management Cycle. (1)

22. The theory proposed by H.H. Reid states that the sudden release of progressively
stored strain in rocks leading to displacement of rocks causes earthquakes.

(a) Name the theory proposed by H.H. Reid. (1)

(b) Explain the cause of Earthquake based on the above theory. (3)

23. Kerala beach is blessed with so many minerals.

(a) What do you mean by placer deposits ? (2)

(b) Give an account of the Beach placer deposits of Kerala, its formation and
minerals present. (2)

SY-429 8

SECTION - III
19  23    4  .
4  . (4  4 = 16)
19. (a)   
 .  
     
. (2)

(b) “    .”
   . (2)

20.      
 .

 > 63%  52 – 63%  45 – 52%  < 45%

21. (a)     . (3)

(b)     . (1)

22. ..      
     
    .

(a) ..      . (1)

(b)      . (3)

23.     .

(a)      ? (2)

(b)     
   . (2)

SY-429 9 P.T.O.

SECTION - IV

Answer any 2 questions from 24 to 26. Each carries 6 scores. (2  6 = 12)
24. Recently, Wayanad in Kerala has experienced landslides.

(a) In connection with Wayanad land slide, discuss the various causes which are
responsible for such landslides. (2)

(b) Suggest some measures to mitigate land slide hazards. (4)

25. (a) Fossils are the remains of once lived organisms. How these are preserved in
rocks ? Brief any two of them. (4)

(b) What are the conditions of preservations of fossils ? (2)

26. Differentiate between the following :

(a) Elastic deformation and Fracture (Rupture) (2)

(b) Disconformity and angular unconformity (2)

(c) Normal fault and Reverse fault (2)

______________

SY-429 10

SECTION - IV
24  26    2  .
6  . (2  6 = 12)
24.     .

(a)   , 
 . (2)

(b)     
. (4)

25. (a)    
  .   
   . (4)

(b)    
 ? (2)

26.   .

(a)    (2)

(b)       (2)

(c)   . (2)

______________

SY-429 11 P.T.O.

SY-429 12