Form 1 Geography Exams and Marking Schemes Free

NAME: ………………………………………..ADM NO: …………………………………

DATE………………………………………..… CLASS……………………………………

GEOGRAPHY

FORM ONE

TERM 3

YEAR

TIME: 2 HOURS

JOINT EXAMINATION

INSTRUCTIONS

Write your Name and admission number in the spaces provided above.
Answer all the questions in the spaces provided.
Candidates should answer the questions in English
This paper consists of 8 printed pages

FOR EXAMINER’S USE ONLY

SECTION	QUESTIONS	MAXIMUM	CANDIDATE SCORE
A	1-5	25
B	6	25
	7	25
	8	25

ANSWER ALL THE QUESTIONS

SECTION A

The diagram below shows the structure of the atmosphere. Use it to answer question (a)

THERMOSPHERE

500 500

80 80

MESOSPHERE

50 50

TROPOSPHERE

EARTH

8-18 8-18

i) Name the part labelled P (1 mk)

…………………………………………………………………………………………………………………………………………………………………………

ii)State two characteristics of the part marked P(2 mks)

………………………………………………………………………………………………………………………………………………………………………….

List two processes by which the solar radiation is lost in the atmosphere

(2 mks)

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a) Define the solar system (2 mks)

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b) Differentiate between rotation and revolution of the earth (2mks)

a)Define the term environment (2 mks)

b)Give four reasons why it is important to study Geography (4 mks)

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a) Name the two major branches of geography (2 mks)

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b)Name two theories that attempt to explain the origin of the earth and the solar system (2 mks)

c) State three characteristics of the sun (3 mks)

State three proofs that explain the spherical shape of the earth (3 mks)

SECTION B ANSWER ALL THE QUESTIONS

Study the climatic data in the table below and answer the questions

months

Temp ⁰C

29.9

23.9

23.3

21.7

18.8

17.8

16.8

17.2

18.9

20.1

21.7

22.3

Rainfall

in mm

109.2

121.9

129.9

76.2

50.8

27.9

38.1

71.1

109.2

121.9

119.4

Draw a simple bar graph to represent the rainfall data. Use a vertical scale of 1 cm rep 10 mm. (6 mks)
Calculate the annual temperature range for the station (2 mks)

With the aid of a well labelled diagram, describe the formation of relief rainfall

(6 mks)

Name any four types of fog (4 mks)

…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

Your class conducted a field study on a weather station

State four preparations you made for the study (4 mks)

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ii)Give three problems you encountered during the field study (3 mks)

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a) Differentiate between minerals and rocks (2 mks)

b) Describe the following characteristics of minerals
i) colour (2 mks)

ii)cleavage (2 mks)

iii)hardness (2 mks)

c) Name the three classifications of rocks according to their origin and mode of formation. (3 mks)

d) Give three examples of plutonic rocks (3 mks)

e) i) You are required to carry out a field study of rocks within the vicinity of your school.
a) State how you would use the following items during the field study
i) Geological hammer (2 mks)

ii)Polythene bags (2 mks)

iii) Route map (2 mks)

b) List three methods you would use to record the information gathered during the study (3 mks)

c)Ways in which rocks contribute to the economy of Kenya (2 mks)

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a) Name three types of maps (3 mks)

………………………………………………………………………………………

b)Mention four types of marginal information (4 mks)

………………………………………………………………………………………………

c)Convert the following representative fraction into statement scale

1:50,000 (2 mks)

d)Give three uses of scales (3 mks)

e)i)What are the main factors influencing mining (4 mks)

………………………………………………………………………………………………

ii)Explain three problems facing exploitation of soda ash in Kenya (6 mks)

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……………………………………………………………………………………….

………………………………………………………………………………………

iii)Give three economic contributions of gold and diamonds to the economy of the

Republic of South Africa (3 mks)

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MARKING SCHEME FORM ONE GEOGRAPHY Term 3

a) i) P – Stratosphere

ii)Characteristics of zone P

falls above troposphere
contains very little water vapour/dust
has a negative lapse rate
contains the ozone gas
pressure decreases with increase in altitude

b)Processes by which solar radiation is lost in the atmosphere

Reflection mainly by clouds
Absorption mainly by gases and water vapour
Scattering mainly by aerosols

a) Solar system is made up of the sun with the planets orbiting around it, and other heavenly bodies

b)Rotation is the movement of the earth on its own axis once in 24 hours in an anticlockwise direction, while revolution is the movement of the earth round the sun on its own orbit in 365 days 366

a) Involves all the external conditions surrounding a living organism and influences it behaviour.

b)One will be able to learn and explain the origin of the earth, solar system and internal structure of the earth.

– Helps learners to develop the skills of observation, reading, analyzing and interpreting maps, photographs etc

– Creates awareness in the significance of management and conservation

– It is a career subject e.g teaching, surveying and photogrammentry

-One acquires basic skills and knowledge which contribute to local, regional and national development

a) Physical geography

Human geography

b)Nebula cloud theory

Passing star theory

c)Produces its own light

– largest member of the solary system

-Radiates solar energy to the earth

-Rotates on its axis in an anti-clockwise direction

Circum-navigation

Satellite photographs

Ship’s visibility

Shape of other planets

Eclipse of the moon

Earth’s curved horizon

Sunset and sunrise

a) Bar graph
title – 2 mks
archs – 2 mks

highest bar – 1 mk

lowest bar – 1 mk
correct use of scale – 1 mk
labelling the axis – 1 mk
b) Annual temp range for the station

29.9⁰C – 16.8⁰C = 13.1⁰C (2 mks)

c) Formation of relief rainfall

Moist air is forced to rise over a hill/mountain
The temperature and air pressure decreases making it to expand
Air cools due to decreased temperature and decreased pressure causing it to expand
Moisture condenses forming tiny water droplets
The tiny water droplets in clouds merge and become too heavy to be suspended in air and fall as rain
Air proceeds to the leeward side with low moisture content
Since its heavier due to being cool it descends over that side and gets warmed making it to hold onto the little moisture it had causing that side to receive low rainfall

d) Radiation Hill steam (4 mks)

-Advection Frontal

-Frontal

-Hill

-Steam

– Radiation

e) i)Preparations

Stating objectives and formulating hypothesis
Selecting suitable method and data collection and recording
Making a reconnaissance/pre-visit
Draw a route map
Conducting literature review
Organizing the class into groups
Holding class discussion
Gathering the necessary materials
Seeking permission from relevant authorities

iii)Rainy/hot/cold

Un co-operative respondents
Attack by insects
One may fall sick

a) Minerals are naturally occurring organic or inorganic substance with definite chemical composition and physical properties on or below the earth surface.

Rocks are combination of mineral particles cemented together to make the solid part of earth’s crust

b)Colour – different minerals show different specific colours

Cleavage – minerals break into patterns/shapes

Hardness – minerals have different degrees of hardness

Hardest – industrial diamonds

Softest – Talc

c)Classifications of rocks – igneous rocks

-Sedimentary rocks

-Metamorphic rocks

d)Examples of plutonic rocks

granite
peridodite
diorite
gabbro

e)i)Geological hammer

Hitting to break rocks into portable pieces
Hitting to determine its hardness

Polythene bags

For carrying/storing rock samples to school for further analysis

Route map – As a guide to locate various types of rocks

b) Data recording methods

Taking photographs
Taking notes
Drawing sketches
Tape recording

c)How rocks contribute to the economy of Kenya

Rocks weather to form soil for agriculture
Rocks weather to form features that creates scenery that attract tourism(foreign exchange)
Some rocks are source of gemstones for ornamental value
Some rocks are used to make fertilizers important for agriculture

a) Types of maps – Atlas maps

-Sketch maps

– Topographical maps

b) Marginal information

Name of the map
Sheet title
Grid system numbers
Map series, sheet number, index and edition
Latitudes and longitudes

c)Convert 1:50,000

1 cm rep 50,000 cm

50,000 cm =0.50,000

100,000

cm rep 0.5 km

d)Uses of scales

Measure distances on maps
Calculate areas on maps
Helps in estimating areas
Helps in reduction and enlargement of map areas

e)i)The value of minerals

The size of the mineral deposit
The quality of ore
The mining method
Technology
Capital
Market
Transport

ii) Problems facing exploitation of soda-ash in Kenya

Stiff competition from developed countries
The low value of salt
High labour cost

iii) Economic contributions of gold and diamonds to the economy of South Africa

Earns the country foreign exchange
Offers employments
Led to urbanization
Formed a broad-based market for other industrial operations
Led to development of modern infrastructure and amenities

Form 1 Geography Exams and Marking Schemes Free

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