Goa Board Class 12 Sample Paper 2023 Geology

Sample Paper
&
Question Paper Pattern
2022
2023

GOA BOARD

GOA BOARD OF SECONDARY AND HIGHER SECONDARY
EDUCATION
Matter pertaining to scheme of evaluation in Geology for STD XII for the academic year
2022-2023

Scheme In General
Board Examination- marks-90
Internal Assessment- marks-10
Total-100

Pattern of board examination
(External Component)

Examination Total Type of Topic/Unit Marks weightage
Marks questions allotted
First 40 M.C.Q. 1.EconomicGeology 12 30%
semester 40 questions 2.Structural Geology 16 40%
carrying 3.Petrology 12 30%
1mark each
Second 30 Subjective 3.Dynamical Geology 15 50%
semester questions
carrying 1,2,3 4.Stratigraphy 15 50%
and 4 marks 5.paleontology
Practical 20 As per the As per the draft 20
coarse draft circulated
circulated
Total 90 90

Pattern of internal Assessment

Test Total Type of questions Topic/Unit
Marks
First test 20 Subjective questions carrying 1,2,3 Economic Geology
and 4 marks
Second test 20 Subjective questions carrying 1,2,3 Structural Geology
and 4 marks Petrology
Third test 20 Different innovative topics related Presentations/
to Geology* creations/other
innovative ideas
Total 60

Page 1 of 13

60 marks to be calculated out of 10
*
Suggested topics for third test (innovative type)

1. Individual collection of rock samples
2. Individual collection of mineral samples
3. Preparation of mineral map of India
4. Preparation of Geological models/ chart of India
5. Collection of different type of soil samples
6. Individual Collection of photographs of Geological features.

Note:
The teacher is free to suggest innovative ideas to students or is free to accept ideas
suggested by students other than those mentioned above.

Page 2 of 13

GOA BOARD OF SECONDARY AND HIGHER SECONDARY
EDUCATION
MODEL QUESTION PAPER 2ND TERM- SUBJECTIVE
STD: XII Science MAX. MARKS: 30
Total No. of Questions-14 Subject: GEOLOGY TIME: 90 MINUTES

INSTRUCTIONS:

(i) All questions are compulsory.

(ii) Draw neat labeled diagram wherever necessary.

(iii) Answer each question on a fresh page

(iv) Figures to the right indicate full marks.

(v) The question paper consists of FOUR SECTIONS. A,B,C and D

a. Section A has 04questions 01 mark each

b. Section B has 05 questions 02 mark each

c. Section C has 04 questions 03 mark each

d. Section D has 01 questions 04mark each

(vi) The total number of questions in the paper are 14

(vii) Select the proper alternative for multiple choice type questions and write

the completed statement. Multiple choice type questions should be attempted

only once

(viii)Answer to the questions carrying 1, 2, 3, and 4 marks should be written in 1

to 10, 50, 80 and 120 words.

Page 3 of 13

Section A
1 Name the youngest Supergroup of Peninsular India. 1
2 At what depth do we encounter Earths outer core? 1
3 What type of mountains are formed under tensional stress? 1

4 State the fundamental time unit with reference to standard Geological time scale 1

Section B
5 Fossils are rare in nature. Explain 2
6 ‘Earths outer core is in fluid state’ Justify. 2
7 Differentiate between ‘shield’ and ‘cinder’ cones with reference to volcanoes 2
8 Explain the geological features of peninsular India. 2
9 Illustrate and Explain ‘Isoseismal lines’ 2

Section C
10 Illustrate and Explain 3
Principle of intrusion
Principal of inclusion

11 Draw a neat diagram and explain features of divergent plate boundary 3
12 Write a brief note on ‘Mesozoic Era’. 3
13 Explain the concept of index fossils and its use 3
Section D
14 Explain the procedure for the location of the epicenter of an earthquake. 4
Or
Illustrate and explain the Himalayan mountain system

Page 4 of 13

The weightage or the distribution of marks over different dimensions of the
question paper shall be as follows:

1. WEIGHTAGE TO LEARNING OUTCOMES:

SR.NO. LEARNING MARKS PERCENTAGE OF
OUTCOMES MARKS
1. KNOWLEDGE 09 30
2. UNDERSTANDING 12 40
3. APPLICATION 06 20
4. SKILL 03 10
T0TAL 30 100

2. WEIGHTAGE TO CONTENT/SUBJECT UNITS:

SR.No. Units Marks
1. DYNAMICAL GEOLOGY 15
2. STRATIGRAPHY & PALAEONTOLOGY 15
TOTAL 30

3. WEIGHTAGE TO FORMS OF QUESTIONS:

SR.NO Form of Questions Marks for Number Total
each of Marks
question questions
1. Long Answer Type (LA) 04 01 04
2. Short Answer Type (SA-I) 02 05 10
3. Short Answer Type (SA-II) 03 04 12
4. Very Short Answer 01 02 02
Type(VSA)

5 Multiple choice question 01 02 02
Total 14 30
Page 5 of 13

The expected time for different types of question would be as follows:

SR.N Form of Approx. time Number of Approx. time for
O. Questions for each questions each form of
Question in (n) Questions in mins
mins (t) (n x t)
1. Long Answer 12 01 12 x 01 = 12
Type (LA) (04)
2. Short Answer 06 05 06 x05= 30
Type (SA-I) (02)
3. Short Answer 10 04 10 x04 = 40
Type (SA-II) (03)
4. Very Short 02 04 02 x04 = 08
Answer type
(VSA) (01)
Total 14 90 Minutes

Page 6 of 13

GOA BOARD OF SECONDARY AND HIGHER SECONDARY
EDUCATION
Matter pertaining to scheme of evaluation in Geology for STD XII (Practical) for the
academic year 2022-2023

Sr.No Syllabus Total Marks
1 Description and identification of 4
Economic Minerals
2 Description and identification of 4
rocks
3 Description and identification of 4
Structural Geology models
4 Study of Geological Maps 4

5 Study of Survey of India 2
Topographic maps
6 Journal and Viva 2
20

Page 7 of 13

GOA BOARD OF SECONDARY AND HIGHER SECONDARY
EDUCATION GEOLOGY SYLLABUS STD XII
Unit Contents/sub topics Period
I Dynamical Geology
Earthquakes- introduction, Focus Epicentre ,seismic waves ,P.S.L
waves, magnitude ,brief mention of Richter scale ,Intensity
1 ,Isoseismal, causes of earthquakes ,Elastic Rebound theory 8
,location of Epicentre of earthquakes, global distribution of
Earthquakes ,risk zones map of India.

Internal structure of the earth- Introduction seismological
evidence ,behaviour of body waves ,shadow zone ,discontinuities,
2 internal structure of the earth as continental crust, oceanic crust, 3
upper mental ,lower mental ,outer core ,inner core with respect to
their composition thickness and depth.

Volcanoes- Definition causes of volcanism ,classification based
on continuity of eruption, types of eruptions, types of volcanic
3 5
cones, products of volcanoes ,Deccan trap of volcanism, post of
volcanic phenomena hot spring geysers etc.

Mountains –Introduction, classification, as tectonic mountains,
volcanic mountains, dome mountains, fold mountains, block
4 4
mountains, non-tectonic residual mountains with their mode of
origin, and examples.
Plate Tectonics and mountain building- Introduction,
divergent, convergent. And strike slip boundaries convergent
5 4
boundaries-ocean-ocean, ocean-continent and continent-continent
interactions with diagrams. Himalayan orogeny, sea of Tethys.

16

Page 8 of 13

II Structural Geology
Strike And Dip-Introduction to basic terms outcrop, bedding, dip,
1 and strike, dip amount, dip direction, apparent and true dip, 2
clinometer compass its use.

Folds-Introduction, definition, parts of folds into axis, axial plane,
width, height and plunge, study of following types of folds- Anticline
2 6
,syncline ,overturned, isoclinal. Recumbent, fan and monocline,
importance study of folds

Faults-Introduction ,definition, elements of faults, faults plane,
hanging wall and foot wall throw and heave ,Genetic classification
3 6
of faults, Geometrical classification of fault ,thrust fault, block fault
,step fault ,importance of studying fault.

Joint – Definition ,terms such as master joint, joint system,
4 geometric classification, strike joint, dip joint, oblique joint bedding 3
joint, genetic classification i.e. tension and shear joints.

Unconformities-Definition ,concept, stages of development of a)
5 angular unconformity b) Non conformity c) disconformity , various 4
possible fields situations .

21
III Petrology -

Igneous Rocks – Introduction, Textures- degree of crystallization,
granularity, shape of the crystals, equigranular and inequigranular
texture, porphyritic and Poikilitic textures, directive and intergrowth
1 textures. Classification chemical- based on silica percentage and 7
silica saturation mineralogical classification formation of igneous

rocks, Bowen’s reaction series factors governing crystallization,
broad tabular classification.

Page 9 of 13

Sedimentary Rocks- Introduction, environment of formation,
2 textures of sedimentary rocks, classification based on origin and 4
grain size.

Metamorphic Rocks- Introduction, kinds and agents of
metamorphism, progressive metamorphism of shale, metamorphic
3 scale, metamorphic grades, metamorphic zone, study of 4
metamorphic fabric such as salty phyllitic schistose and gneissose
rocks

15

IV Palaeontology and stratigraphy

Fossils-Introduction, concepts and various modes of preservation
of fossils ,importance of fossils ,uses of fossils in palaeo-geography
1 4
palaeo climate and palaeo tectonics ,concept of index fossils and
its use in stratigraphy

Stratigraphy- Introduction ,principal of stratigraphy such as
inclusions, intrusion and uniformitarianism and their applications,
2 stratigraphic correlation- introduction, elements of correlation such 7
as time unit, time stratigraphic units and litho-stratigraphic units
Methods of co relation and radioactive methods.
Standard Geological Time scale-study of geological time scale
with respect to various evolutionary changes and time spans of
3 3
various time units’ study of Palaeozoic, Mesozoic and Cenozoic
Era.

Page 10 of 13

Brief outline of stratigraphy of peninsular India-
physiographic divisions of India. Study of following Supergroups’
with respect to their distribution, classification (upto group level)
4 6
lithology and economic importance (a) Dharwar Supergroup (b)
Cuddappah Supergroup (C) Vindhayan Supergroup (d) Gondawana
Supergroup (e) Deccan Traps .Brief outline of stratigraphy of Goa.

20

Economic Geology
Introduction- Basic terms such as Ore, Gangue, Ore Minerals
1 2
Beneficiation and Tenor ,cut-off grade
Origin of ore deposits- Syngenetic and epigenetic deposits,
igneous deposits, pegmatite deposits, Hydrothermal deposits,
2 10
Metasomatic deposits, sedimentary deposits, Metamorphic
deposits.
Petroleum- Definition, chemical composition origin, organic
theory, accumulation and Indian distribution. Coal-Introduction,
3 4
classification as peat, lignite, bituminous and Anthracite, formation
of coal, Indian distribution.

Distribution of economic minerals in India - Metallic
Minerals (a) Aluminium Ore (b) Copper Ore (C) Chromium Ore (d)
4 5
Gold (e) Iron Ore (f) Manganese Ore (g) Lead zinc. Non-metallic
minerals (a) Gypsum (b) Bartye (c) Mica (d) Radioactive minerals

Economic minerals wealth of Goa - Brief outline of Goa
5 mining industry with respect to Iron, Manganese and Aluminium 3
deposits with their distribution.

24
Page 11 of 13

GEOLOGY PRACTICAL COURSE FOR STD XII SCIENCE
No .of
Sr.
CONTENTS practical
No
sessions

Description and identification of the following economic minerals
with respect to physical properties, chemical composition,
occurrence and use.

Metallic Mineral:
Iron Ore :- Hematite, Magnetite, Pyrite, Limonite
Manganese Ores :-Pyrolusite , psilomelane
1 Copper Ore:- Chalcopyrite 4
Lead Ore :- Galena
Chromium Ore :- Chromite
Aluminium Ore :- Bauxite
Non Metallic Minerals :-
Gypsum , Graphite, Barite, Asbestos Biotite, Muscovite, Talc
Amethyst, Kyanite, calcite

Description and identification of the following rock types.

Igneous Rocks:-Pegmatite, granite, Rhyolite, Syenite, Trachyte,
Micro Granite, diorite, Gabbro Basalt, Pyroxenite, Dolerite along

2 with Porphyritic varieties. 3
Sedimentary rocks :-Breccia, Conglomerate, Sandstone, Shale,
Limestone, Coal, Bauxite, Laterite
Metamorphic rocks: - Slate, Phyllite, Schist (at least three verities),
Gneiss Marble, Quartzite.
Study of Structural geological Models :-
Strike and dip:-
3 4

Folds:-Anticline Syncline (symmetrical and asymmetrical),
Isoclinals, Fan, Recumbent, Monocline.
Page 12 of 13

Faults: - Normal Fault, Reserve fault, Step fault, and Block Fault.

Unconformities :-Angular, Disconformities, and non-conformity

Study of Geological maps with cross sections having horizontal
4 3
sequence and vertical instructions (at least six maps)

Study of survey of India topographic maps with respect to marginal
5 2
information, relief, drainage and vegetation [at least 5 maps]

16

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