|
|
|
|
|
BSC410S - BASIC SCIENCE - 1ST OPP - NOVEMBER 2025 |
|
|
1 Pages 1-10 |
▲back to top |
|
|
1.1 Page 1 |
▲back to top |
nAml BIA UnlVERSITY
OF SCIEnCI::Ano TECHnOLOGY
FacultyofHealthN, atural
ResourceasndApplied
Sciences
Schoolof Naturaland Applied
Sciences
Departmentof Biology,
ChemistryandPhysics
13JacksonKaujeuaStreet T: +264612072012
Private Bag13388
F: +264612079012
Windhoek
E: dbcp@nust.na
NAMIBIA
W: www.nust.na
QUALIFICATION: VARIOUS
QUALIFICATIONCODE: VARIOUS
LEVEL:4
COURSE: BASIC SCIENCE
COURSE CODE: BSC410S
DATE: NOVEMBER 2024
SESSION: 1
DURATION: 3 HOURS
MARKS: 100
FIRST OPPORTUNITY: EXAMINATION QUESTION PAPER (FM)
EXAMINER: Mrs Leonoritha Naomas, Mr Simeon Ambuga and Mr Ferdinard Hakaala,
Dr Vaino lndongo
MODERATOR: Prof Edosa Omoregie
INSTRUCTIONS:
1. Answer all questions on the separate answer sheet.
2. Please write neatly and legibly.
3. Do not use the left side margin of the exam paper. This must be allowed for the
examiner.
4. No books, notes and other additional aids are allowed.
5. Mark all answers clearly with their respective question numbers.
PERMISSIBLE MATERIAL:
Non-Programmable Calculator
ATTACH EM ENT
None
This paper consists of 18 pages including this front page and a Periodic Table
1
|
|
1.2 Page 2 |
▲back to top |
SECTION A: BIOLOGY
[35]
QUESTION 1
(20)
Question Type: Multiple Choices. Choose and write a letter corresponding to the correct
answer. Each correct answer carries 1 mark.
1.1 Organisms that lack nucleus and cell organelles belong to the following kingdoms:
i)
Fungi
ii) Protista
iii) Archaebacteria
iv) Eubacteria
A. (i) and (ii)
B. (ii) and (iii)
C. (i) and (iii)
D. (iii) and (iv)
1.2 In taxonomy hierarchy family comes between;
A. Class and order.
B. Order and genus.
C. Genus and specie.
D. Division and Class
1.3The term "Animalia" refers to the ______
A. Kingdom
B. Phylum
C. Domain
D. Genus
to which numerous organisms belong.
1.4 Which characteristic must all species have in order to avoid extinction?
A. Excretion
B. Reproduction
C. Growth
D. Respiration
2
Basic Science First Opportunity Examination Question Paper, FM, November 2024
|
|
1.3 Page 3 |
▲back to top |
1.5 Respiration is one of the seven characteristics of all living organisms. What is meant by
respiration?
A. The way that all living things are made of cells.
B. The way living things get energy from food.
C. The reaction to a change in the environment.
D. Being able to produce a new individual.
1.6 The science that deals with the relationships between living organisms and their
physical environment is known as:
A. Ecology
B. Biodiversity
C. Ecosystem
D. Environment
1.7 Which of the following is true about secondary consumers in an ecosystem?
A. They eat only plants.
B. They are eaten by primary consumers.
C. They are smaller and weaker than are primary consumers.
D. They are fewer in number than are primary consumers.
1.8 The organic and inorganic materials in all the organisms in the diagram will eventually
return to the environment by the action of;
A. decomposers
B. producers
C. primary consumers
D. secondary consumers
1.9 A barnacle grows on a whale, doing it no harm. This is an example of;
A. vitalism
B. mutualism
C. parasitism
D. commensalism
3
Basic Science First Opportunity Examination Question Paper, FM, November 2024
|
|
1.4 Page 4 |
▲back to top |
1.1 O Organisms of the same specie fighting over shared resources is called;
A. character displacement
B. intraspecific competition
C. predation
D. interspecific competition
1.11 Fat soluble vitamins;
A. are easily excreted.
B. seldom cause toxicity.
C. require bile for absorption.
D. are not stored in the body.
1.12 Citrus fruits are and excellent source of;
A. Calcium
B. Vitamin C
C. Vitamin D
D. Calories
1.13 Anemia is defined as the lack of ........... in the diet.
A. Calcium
B. Sodium
C. Iron
D. None of the above.
1.14 A substance needed by the body for growth, energy, repair and maintenance is
known as;
A. Calories
B. Fatty acid
C. Carbohydrate
D. Nutrient
4
Basic Science First Opportunity Examination Question Paper, FM, November 2024
|
|
1.5 Page 5 |
▲back to top |
1.15 Obesity results if;
A. energy intake is lesser than energy expenditure.
B. the number of enzymes becomes more than the food.
C. energy expenditure is less than energy intake.
D. energy expenditure is more than energy intake.
1.16 Bacteria like Lactobacillus produce what compound required for the production of
sauerkraut, yogurt, and sourdough is;
A. Lactic acid
B. Carbon dioxide
C. Yeast
D. Flour
1.17 Cheese is made by coagulating which of the following milk protein;
A. Rennet
B. Casein
C. Pepsin
D. Trypsin
1.18 Enzyme use to coagulate milk during cheese making procedure is;
A. Chymosin
B. Rennet
C. Trypsin
D. Amylase
1.19 Which of the following conditions affect the survival of microorganisms?
A. pH
B. temperature
C. oxygen concentration
D. all of the above
5
Basic Science First Opportunity Examination Question Paper, FM, November 2024
|
|
1.6 Page 6 |
▲back to top |
1.20 Fermentation occurs in the;
A. presence of oxygen
B. absence of oxygen
C. presence of nitrogen
D. presence of carbon
QUESTION2
(15)
Structured questions
2.1 Define pasteurization and homogenation.
(2)
2.2 Name two reasons why manual crushing of grapes were replaced with mechanical
methods.
(2)
2.3 Name four health benefits of yoghurt.
(4)
2.4 List the deficiency disorders associated with prolonged deprivation of the following
nutrients, namely; vitamin A, vitamin C, iodine and haemoglobin.
(4)
2.5 Differentiate between endangered and extinct species, and state one contributing
factor.
(3)
SECTION B: CHEMISTRY
[35]
QUESTION 3
(20)
Question Type: Multiple Choices. Choose and write a letter corresponding to the correct
answer. Each correct answer carries 1 mark.
3.1 An experiment was carried out on determination of boiling point of water, the accepted
value is 373.15 K, whereas the measured value is 365.15 K. What is the error value from
this experiment?
A.-8
B. - 738.3
C.8
D. - 735.1
3.2 Which of the following is the SI unit of temperature?
A. Fahrenheit
B. Celsius
C. Kelvin
6
Basic Science First Opportunity Examination Question Paper, FM, November 2024
|
|
1.7 Page 7 |
▲back to top |
D. Degree
3.3 On the Fahrenheit scale the freezing point of water is 32 °F and its boiling point
is__ _
A. 100 °F
B. 0 °F
C. 273.15 °F
D.212°F
3.4 The distance from NUST main gate to Wernhil shopping mall is reported as 0.901 km,
what is this distance in centimetres?
A. 901 cm
B. 901,000 cm
C. 9.01 x 104 cm
D. None of the above
3.5 Do the following calculations and report the final answer with the correct number of
significant figures and in scientific notation.
(2.471 x 206 m) + (2.30 x 1o-0 m)
Which of the following answers is correct?
A.2.213x10- 10 m
B. 2.213 X 1010 m
C. 2.21 X 10-10 m
D. 2.21 x 1010 m
3.6 Which of these is not a compound?
A. Carbon dioxide
B. Oxygen
C. Water
D. Sodium Chloride
7
Basic Science First Opportunity Examination Question Paper, FM, November 2024
|
|
1.8 Page 8 |
▲back to top |
3. 7 In order for ice (solid) to melt into liquid, certain conditions must be met, what
determines phase change?
A. Pressure
B. Temperature
C. Particle arrangement
D. Pressure and Temperature
3.8 Phase change can be described as either exothermic or endothermic, which of the
following phase change is exothermic?
A. Melting
B. Freezing
C. Sublimation
D. Evaporation
3.9 Which of the following is not a chemical property?
A. Rust
B. Fermentation
C. Boiling point
D. Decomposition
3.1 O Which of the physical properties of a sample depends on the amount of matter in the
sample?
A. Melting point of the sample
B. Hardness of the sample
C. Length of the sample
D. Colour of the sample
3.11 Which separation method involves using heat to convert a liquid into vapor, then
cooling it back to liquid?
A. Evaporation
B. Distillation
C. Filtration
D. Chromatography
8
Basic Science First Opportunity Examination Question Paper, FM, November 2024
|
|
1.9 Page 9 |
▲back to top |
3.12 Which of the following accurately describes the structure of an atom?
A. Protons and electrons inside the nucleus
B. Protons and neutrons in the nucleus, electrons around it
C. Neutrons and electrons in the nucleus, protons around it
D. Protons, neutrons, and electrons orbiting the nucleus
3.13 Elements in the same group of the periodic table have similar __ _
A. Atomic mass
B. Number of protons
C. Number of valence electrons
D. Physical properties
3.14 Which of the following elements is most likely to form a cation?
A. Oxygen
B. Chlorine
C. Sodium
D. Sulfur
3.15 Which of the following elements has naturally occurring isotopes?
A. Helium
B. Hydrogen
C.Neon
D. Argon
3.16 Which of the following is a strong acid?
A. Hydrochloric acid
B.Ammonia
C. Carbonic acid
D. Acetic acid
9
Basic Science First Opportunity Examination Question Paper, FM, November 2024
|
|
1.10 Page 10 |
▲back to top |
3.17 Which of the following bases is commonly used in soap making?
A. Sodium hydroxide
B. Ammonium hydroxide
C. Magnesium hydroxide
D. Sodium acetate
3.18 A farmer wants to reduce the acidity of the soil to improve crop growth. Which of the
following would be a suitable substance to add to the soil?
A. Ammonium sulfate
B. Calcium hydroxide
C. Sodium hydroxide
D. Vinegar
3.19 You are tasked with identifying whether a solution is acidic or basic, but you only have
red litmus paper. You dip it into the solution, and the paper remains red. Is the solution
basic or acidic?
A. The solution is neutral or basic
B. The solution is acidic
C. The solution is neutral or acidic
D. The solution is basic
3.20 A copper smelting company in Namibia accidentally releases sulfur dioxide (S0 2) into
the atmosphere. When this gas dissolves in rainwater, it forms sulfurous acid (H2S0 3).
What impact will this have on the pH of the rainwater?
A. It will make the rainwater neutral
B. It will increase the rainwater's pH
C. It will decrease the rainwater's pH, causing acid rain
D. It will have no effect on the rainwater
10
Basic Science First Opportunity Examination Question Paper, FM, November 2024
|
|
2 Pages 11-20 |
▲back to top |
|
|
2.1 Page 11 |
▲back to top |
QUESTION4
[15]
4.1 Perform the fol~owing calculations, and provide your answer to the correct number of
significant figures.
(2)
(i) (0.0045 X 100) - 22.512 =
(ii) 3.24 m X 7.0 =
4.2 Fill in the missing part of the table below
(2)
Atom
Na+
Proton#
Electron#
Neutron#
12
Mass#
17
35
p
15
4.3 Provide the chemical names and common names/uses for the following chemical
formulas;
(3)
(i) NaHC03
(ii) NaCl
(iii) CH3COOH
4.4 Differentiate between intensive and extensive properties of matter and give an example
of each.
(4)
Intensive properties
•
•
•
Extensive properties
•
•
•
4.5 Red and white phosphorus allotropes of phosphorus, define what is meant by'allotropes'
are and give another example of allotropes of an element that you have learned.
(2)
4.6 Define the term alloy and give one example of an alloy.
(2)
11
Basic Science First Opportunity Examination Question Paper, FM, November 2024
|
|
2.2 Page 12 |
▲back to top |
SECTION C: PHYSICS
[30]
QUESTIONS
(20)
Question Type: Multiple Choices. Choose and write a letter corresponding to the correct
answer. Each correct answer carries 1 mark.
5.1 What does the acronym "TAILS" stands for?
A. Title, Axes, Intervals, Labels and Scale.
8. Total, Ages, Intervals, Labels and Scale.
C. Title, Axes, Intervals, Labels and Sketch.
D. Tails, Axes, Intervals, Labels and Small.
5.2 The graph below shows speed-time graph for an athlete as he was running from upper
campus to lower campus.
w
20
25
Tim~ (s~o~)
(i) What is the acceleration of an athelete in the first 1Oseconds?
A. 0.625 mis
B. 1.6 mis
C. 0 m/s 2
D. 1.6 m/s 2
(ii) How far is the upper campus from lower campus?
A. 280m
B. 160m
C. 40m
D. 200m
12
Basic Science First Opportunity Examination Question Paper, FM, November 2024
|
|
2.3 Page 13 |
▲back to top |
5.3 How should you formulate the title of your graph
A. x-axis vs y-axis
B. horizontal vs vertical
C. Time vs Distance graph
D. Dependent variable vs Independent variable
5.4 Given the equation F=ma, which variables are vectors
A. Fand m
B. m and a
C. F and a
D. All of them
5.5 What is the unit of force?
A. Kg
B. m/s
C. Kg.ms-2
D. N/Kg
5.6 Which of the following is a renewable source of energy?
A. Geothermal
B. Natural gas
C. Petrol
D. Coal
5.7 Energy source derived from the earth's heat is called?
A. Geothermal energy source
B. Fossil fuels
C. Biomass
D. All of the above
13
Basic Science First Opportunity Examination Question Paper, FM, November 2024
|
|
2.4 Page 14 |
▲back to top |
5.8 What is the main difference in the generation of electricity with water and nuclear
energy?
A. Nuclear energy is a dangerous source of energy and hydroelectric power is safe
B. In nuclear energy fission of atoms heat water which turns the generator which
generates electricity while in hydroelectric energy, potential energy of water turns
the turbines which turns the electricity.
C. Hydroelectric power is a renewable source of energy while nuclear energy is non-
renewable source of energy.
D. All of the above.
5.9 The transfer of energy by the application of a force that causes the body to move in the
direction of force is called;
A. Power
B. Distance
C. Mechanical advantage
D. work
5.10 Fendy and Pius are lifting a box 12 cm upward. They exert forces of 30 N and 35 N on a
box, respectively. How much work is being done?
A. 78 J
B. 360 J
C. 7.8J
D. 420 J
5.11 Which of the following processes require the most work?
A. A 1000 kg weight rest on a bench
B. A person lifting a 1Okg weight 1 m off the floor
C. A person holding a 1 kg weight stationary with outstretching arms.
D. A person lifting a 1 kg weight 1 m off the floor
14
Basic Science First Opportunity Examination Question Paper, FM, November 2024
|
|
2.5 Page 15 |
▲back to top |
5.12 A 5 kg cart is at the top of 20 m hill. If the energy is conserved what would be the velocity
of an object at ground.
If the energy is conserved, what will be the velocity of an object on the ground
(g=1ON/Kg)?
A. 20 mis
B. 400 mis
C. 40 mis
D. 8000 mis
5.13 What is the total voltage in the circuit below?
A. 9V
B. 4V
C. 2A
D. 3 ohms
15
Basic Science First Opportunity Examination Question Paper, FM, November 2024
|
|
2.6 Page 16 |
▲back to top |
5.14 What is the resistance in the circuit below?
+
A. 1 ohms
B. 3 ohms
C. 11 ohms
D. 2ohms
5.15 A light bulb has a resistance of 800 ohms and the voltage across it is 240 V. How much
current will the buld draw?
A. 300 mA
B. 3000000A
C. 0.003A
D. 192000A
5.16 Which of the following quanties remain the same in all parts of a series circuit?
A. Voltage
B. Current
C. Power
D. Resistance
5.17 ____
is a process by which the nuclei of a nuclide emit a, por y rays.
A. Radioactive decay
B. Transmutation
C. Nuclear Forces
D. Isotopes
5.18 Atoms with identical atomic numbers but different mass numbers are known as?
A. Mass Number
B. Nuclides
C. Nucleons
D. Isotopes
16
Basic Science First Opportunity Examination Question Paper, FM, November 2024
|
|
2.7 Page 17 |
▲back to top |
5.19 Which of the following particles resembles the nucleus of helium?
A. Beta particle
B. Alpha particle
C. Gamma particle
D. All of the above
QUESTIONS
[10]
Structured questions
6.1 Name and explain three fundamental forces of nature.
(3)
6.2 State the law of conservation of energy.
( 1)
6.3 Define power.
( 1)
6.4 Construct a parallel circuit diagram with one cell, a closed switch and an ammeter and
three bulbs connected in parallel.
(5)
17
Basic Science First Opportunity Examination Question Paper, FM, November 2024
|
|
2.8 Page 18 |
▲back to top |
OJ
teu n
(")
en
(")
CD
::l
(")
CD
.e..n...
..-+
0
"O
"O
0
;:i
C
::l
;=j.'
'<
m
X
tu
3
::l
tu ....
::!'. 00
0
::l
,0
C
CenD
::!'.
0
::l
"1J
tu
"O
.,CD
.;"'
3:
z
0<CD
3cr
C...D...
N
0
N
PERIODIC TABLE OF THE ELEMENTS
18
1
2
H
I .00794 2
13 14 15
He
16 17 4.00260
34
56
7
8 9 10
Li Be
B C N 0 F Ne
6.941 9.01218
10.81 12.011 14.0067 15.9994 18.9984 20.179
11 12
Na Mg
22.9898 24.305 3
4
5
6
13 14 15 16 17 18
Al Si p s Cl Ar
7
8
9
10
11
12 26.9815 28.0855 30.9738 32.06 35.453 39.948
19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
K Ca Sc Ti V Cr Mn Fe Co. Ni Cu Zn Ga Ge As Se Br Kr
39.0983 40.08 44.9559 47.88 50.9415 51.996 54.9380 55.847 58.9332 58.69 63.546 6538 69.72 72.59 74.9216 78.96 79.904 83.8
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
Rb Sr y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
85.4678 87.62 88.9059 91.22 92.9064 95.94 {98) 101.07 102.906 106.42 107.868 112.41 114.82 118.69 121.75 127.6 126.9 131.29
55 56 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86
Cs Ba Lu Hf Ta w Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
132.905 137.33 174.967 178.49 180.948 183.85 186.207 190.2 192.22 195.08 196.967 200.59 204383 207.2 208.908 (209) (210) (222)
87 88 103 104 105 106 107 108 109 110 111 112
114
116
118
Fr Ra Lr Rf Db Sg Bh Hs Mt Uun Uuu Uub
Uuq
(223) 226.025 (260) (261) (262) (263} (264} '265) '268) (269) (272) (269)
Uuh
Uuo
Lantbanides; 57 58 59 60 61 62 63 64 65 66 67 68 69 70
La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb
138.906 140.12 140.908 14414 (145) 150.36 151.96 157.25 158.925 162.50 161.930 167.26 166.934 173.04
Actinides:
89 90 91 92 93 94 95 96 97 98 99 100 101 102
Ac Th Pa u Np Pu Am Cm Bk Cf Es Fm Md No
227.028 232.038 231.036 238.029 237.048 (244) (243) (247) (247) (251) (252) (257) (258) (259)