Download BSc mock past questions and answers

	     	                       	 	   MOCK EXAMINATION, 2010/2011 SESSION.
			   SUBJECT: BASIC SCIENCE
		             CLASS: JSS 3       	          TIME ALLOWED:1½HRS  
 
   INSTRUCTION: Answer ALL the questions. 

1.	………….. in the ear are responsible for maintaining balance
	A.  cochlea	B.  eardrums	C.  ossicles	D.  semi – circular canals E.  membranes
2.	................ responds to the stimuli of heat, pressure, cold and touch.
	A.  the ear	B.  the eye	C.  the skin	D.  the nose	E.  the heart
3.	The brain and spinal cord make up the ……………
	A.  nervous system	B.  circulatory system		
C.  autonomic nervous system		D.  peripheral nervous system	 E.  central nervous system
4.	The spinal cord is found inside the ………
	A.  skull	B.  vertebral column	C.  pelvis	D.  ribs		E.  sternum
5.	Long fibres which connect every part of our body to the brain are
	A.  nerves	B.  receptors	C.  effectors	D.  nephrons	E.  receiver
6.	The difficulty in seeing horizontal and vertical lines properly is described as
	A.  hypermetropia	B.  astigmatism	C.  Myopia	D.  Conjuctivitis	E.  Blured vision
7.	Myopia can be corrected with glasses that have ……… lenses
	A.  biconvex	B.  biconcave	C.  Convex	D.  Concave	E.  Cylindrical
8.	The chemical symbol for gold is
	A.  Ag		B.  Gd		C.  Au		D.  Gl		E.  Hg
9.	................... is an element for coating iron in the process called galvanization.
	A.  carbon	B.  zinc	C.  Copper	D.  Silver	E.  Oxygen
10.	................ is a substance made of two or more elements which are chemically combined
	A.  atom	B.  molecule	C.  radical	D.  compound		E.  mixture
11.	………… is an example of a mixture.
	A.  limestone	B.  water	C.  salt		D.  quicklime		E.  air
12.	The following elements have their symbols derived from the first letter of their names EXCEPT
	A.  fluorine	B.  sulphur	C.  potassium		D.  nitrogen	E.  boron
13.	What is the latin name of the element sodium?
	A. cuprum	B.  ferrum	C.  plumbum	D.  natrium	E.  salium
14.	The number of electrons in the outermost shell of an element is called
	A.  atomic number	B.  valency	C.  symbol	D.  mass number	E.  atomic radius
15.	The sum of protons and neutrons in the nucleus of an atom is 
	A.  electron	B.  atomic number	C.  neutron number	D.  mass number	E.  shell number
16.	Which of the following substances is a compound?
	A.  carbon	B.  hydrogen	C. Water	D.  zinc	E.  oxygen
17.	What is the chemical formula of carbohydrate?
	A.  C6H12O6		B.  CO2	C.  H2O	D.  H2SO4	E.  CaCl2
18.	The part of the eye on which images are formed is called
	A.  cornea	B.  iris		C.  pupil	D.  lens	E.  Retina
19.	............. taste is detected at the back of the tongue
	A.  sweet	B.  sour	C.  salty	D.  bitter	E.  acid
20.	The ………….. is an olfactory organ
	A.  eye		B.  nose	C.  ear		D.  heart	E.  tongue






21.	Dyes can be obtained from
A.  neom and indigo plants	B.  camwoood and indigo plant	C.  camwood and mahogany plant D.  ebony and camphor plant		E.  cotton and camphor plant
22.	……… are used for buildings and furniture
	A. wood crops		B.  food crops		C.  dyes	D.  cash crops	      E.  shrubs	
23.	……………. are used for making leather shoes, bags, drums
	A.  cotton	B.  dyes	C.  hides and skin	D.  poultry products  E.  wood crops
24.	………… is found in Ilesa (osun state) and Bida (Niger state)
	A.  limestone	B.  coal	C.  gold	D.  bitumen	E.  tin
25.	The raw material for manufacturing cement is 
	A.  limestone	B.  gold	C.  coal	D.  bitumen	E.  sand
26.	What is the solid mineral used for tarring road surfaces?
	A.  coal	B.  bitumen	C.  sand	D.  lead	E.  iron ore
27.	Which of the following soil type retains water most?
	A.  humus	B.  clayey	C.  sandy	D.  loamy	E.  none of the above
28.	Right application of science is expressed in one of the following ways.
	A.  production of atomic bombs	B.  production of guns		
C.  nuclear weapons	D.  production of fertilizers	E.  production of bullets
29.	Ethical issues are decided by
	A.  the family		B.  legislators	C.  teachers	D.  scientists	E.  workers
30.	Which of the following is the wrong application of science?
	A.  destruction of mankind	B.  promotes development	
C.  provides comfort to humans	D.  brings ease to life	E.  production of drugs and vaccines
31.	A screw is a type of simple ……….
	A.  wheel and axle	B.  pulley	C.  lever	D.  gear	E.  machine
32.	The transfer of traits from parents to offspring is known as
	A.  heredity	B.  genes	C.  fertilization	D.  pregnancy	E. conception
33.	The changing of the lens to focus both far and near objects is called
	A.  accommodation	B.  viewing	C.  myopia	D.  adjustment		E.  astigmatism
34.	The end product of protein digestion is 
	A.  glucose	B.  amino acid		C.  glycerol	D.  fatty acids	E.  protein
35.	If a force of 18N moves through a distance of 3m in the direction of the force, what is the workdone?
	A.  5.4J	B.  540J	C.  54J		D.  6J		E.  54N
36.	Which of the following is NOT a cash crop?
	A.  cocoa	B.  rubber	C.  timber	D.  cotton	E.  none of the above
37.	One of the following is NOT a reflex action
	A.  blinking of the eyes	B.  sneezing	C.  breathing	D.  reading	E.  knee jerk
38.	Fertilization of ovum by the human sperm occurs in the 
	A.  uterus	B.  cervix	C.  Testes	D.  vas deferens	E.  oviducts
39.	The activities of the cell is controlled by
	A.  cell wall	B.  chromosome	C.  cell membrane	D.  nucleus	E.  vacuole
40.	The method of heat transfer through solid materials (metals) is 
	A.  radiation	B.  conduction		C.  convection		D.  Transmission	E.  Transportation
41.	Starch is stored in the muscles and liver in the form of 
	A.  glycogen	B.  glucose	C.  fructose	D.  glycerol	E.  maltose
42.	A body of mass 30Kg fell from a height of 1.5m to the ground. What was the potential energy of the body before falling? (g = 10m/s)
	A.  41.5J	B.  35.5J	C.  450J	D.  45.5J	E.  350J




43.	The maximum number of electrons in the second shell of an atom is
	A.  32		B.  8		C.  10		D.  18		E.  2
44.	The series of colours into which white light is split is called a
	A.  reflection	B.  lens	C.  Prism	D.  Refraction		E.  Spectrum
45.	The nerve that connects the eye to the brain is 
A.  peripheral nerve	B.  spinal nerve	C.  visual nerve  D.  optic nerve	E.  sensory nerve
46.	The rate at which work is done is
	A.  weight	B.  energy	C.  power	D.  distance	E.  speed
47.	The bending of light as it passes from one medium to another is 
	A.  refraction	B.  diffusion	C.  Reflection		D.  Dispersion 	E.  Interference
48.	Soil erosion can be controlled in the following ways EXCEPT
	A.  terracing	B.  mulching	C.  strip cropping	D.  leaching	E.  cross bars
49.	The ozone layer is located in the 
A.  exosphere	B.  thermosphere	C.  stratosphere	D.  mesosphere E.  troposphere
50.	……… helps in the absorption of food in the small intestine
	A.  villi	B.  artery	C.  rectum	D.  capillary	E.  vein
51.	Mechanical energy is converted to electrical energy in a
	A.  battery	B.  blender	C.  fan		D.  electric iron	E.  generator
52.	Which of these statements is true of a physical change?
A.  large heat change is involved	B.  it is a permanent change	C.  it is not easily reversible	    D.  it is easily reversible	E.  new substance is formed
53.	A boy of mass 60Kg is moving with a velocity of 4m/s. calculate his kinetic energy
	A.  240J	B.  120J	C.  480J	D.  15J		E.  56J
54.	One of the following is NOT a geographical area prone to desertification
	A.  Sokoto	B.  Oyo		C.  Katsina	D.  Borno	E.  Kano

55.		




		What is the angle of incidence in the diagram above?
	A.  900		B.  350		C.  550		D.  1450	E.  650
56.	Drug abuse can be prevented by the following EXCEPT
A.  enforcement of regulations by drug control agencies	B.  engage the youth in positive activities C.  inculcate coping skills in public enlightenment campaigns	D.  religious organizations should engage youths in positive social interactions	E.  education and general awareness on the profits of drug abuse
57.	Which of these is sexually transmitted?
	A.  malaria	B.  gonorrhoea		C.  diarrhea	D.  anaemia	E.  leukaemia
58.	Sources of energy that can be recycled in nature are
	A.  non renewable	B.  chemical	C.  Heat	D.  Renewable		
E.  mechanical
59.	Crude oil is refined by applying the method of 
A.  boiling	B.  distillation		C.  destructive distillation	D.  fractional distillation	     E.  decantation
60.	………. is described as a global network of several computers.
	A.  fax machine	B.  Camera	C.  Telephones	D.  internet	E.  web camera




61.	The following are by – products of refined crude oil EXCEPT
	A.  petrol	B.  light oil	C.  diesel	D.  kerosene	E.  bitumen
62.	……………. converts excess amino acids into urea
	A.  liver	B.  kidney	C.  bladder	D.  muscles	E.  spleen
63.	The outer protective layer of the skin is called
A.  sebaceous gland	B.  sweat pores	C.  dermis	D.  Sweat gland	E.  epidermis
64.	The following diseases are transferred by direct contact EXCEPT
	A.  scabies	B.  measles	C.  small pox	D.  eczema	E.  leprosy
65.	The tubes which carry urine from the kidneys to the bladder are
	A.  medulla	B.  ureter	C.  cortex	D.  Urethra	E.  pelvis
66.	............ are the groups of drugs that relieve pain and induce sleep
	A.  sedatives	B.  hallucinogens	C.  stimulants	D.  sleeping tablets	E.  narcotics
67.	……….. is used by the blood platelets as a clotting substance
	A.  fibrinogen		B.  leucocytes		C.  Thrombocytes	E.  erythrocytes	E.  plasma
68.	………… is the force that occurs between two bodies separated by space
A.  contact force	B.  frictional force	C.  force field	D.  tension force  E.  none of the above
69.	The chemical symbol of iron is 
	A. I	B.  Io	C. Fe	D. F	E. In
70.	……….. is the habitat where salt water meets with fresh water.
	A.  aquatic	B.  swamp	C.  mangrove	D.  stuarine	E.  lake
71.	Gases can be compressed easily because
A.  they have definite shape	B.  they have definite mass	C.  they have large spaces between the particles	D.  the particles have strong forces	E.  they have definite volume
72.	…….. is the ratio of energy output to energy input
	A.  efficiency	B.  work	C.  power	D.  rate		E.  speed
73.	A special type of involuntary muscle found in the heart is ……….. muscle.
	A.  biceps	B.  triceps	C.  reflex	D.  cardiac	E.  ciliary
74.	Carbon (iv) oxide is released into the atmosphere by
A.  photosynthesis	B.  decay of dead organic matter C.  breathing in  D.  the sun	E.  none of the above	
75.	The adaptation of plants to aquatic habitats does not include
A.  possession of long stem and flower stalk	B.  leaves with large air spaces    
C.  development of water storage tissues in leaves and stems	D.  posses breathing roots for exchange of gases		E.  none of the above
76.	The vitamin responsible for blood clotting during injury is vitamin
	A.  B	B.  C	C.  A	D.  K	E.  F
77.	Kinetic theory of matter states that
A.  particles are in fixed position	B.  particles are in an ordered manner
C.  particles are in constant temperature	D.  particles are in constant random motion		    E.  particles are composed of only solids
78.	The load between the fulcrum and effort describes the
	A.  1st class lever	B.  2nd class lever	C.  3rd class lever  D.  effort lever	E.  pivot lever
79.	The following are parts of a gear EXCEPT
	A.  driven wheel	B.  teeth	C.  driving wheel	D.  pitch	E.  shaft
80.	Maize ? grasshopper ? lizard ? snake. In the above food chain, the primary consumer is 
	A.  maize 	B.  grasshopper	C.  lizard	D.  snake	E.  lizard and snake







				THEORY
1ai.	List four (4) components of blood						2mks
   ii.	State the major classes of food						3mks
  b.	State one (1) difference between physical and 
chemical change								2mks
  c.	Calculate the power of a machine that has done work 
of 450joules in 15seconds.							3mks

2a.	In a tabular form, differentiate between incident ray and 
reflected ray of light								1mk
 bi.	With the aid of a diagram, show the types of radioactive rays/particles	2mks
  ii.	State one (1) deficiency symptom of each of the following
	(i)  vitamin K		(ii)  protein	(iii) vitamin B				3mks
 c.	Draw a well labelled diagram of the human eye.				4mks

3ai.	State what accounts for apparent depth and the dispersion of light		1mk
   ii.	In a tabular form, mention two (2) differences between
 animal cell and plant cell.							2mks
 bi.	Mention the three (3) parts of the brain					3mks							
 bii.	Copy and complete the table below
		
Element
Atomic number
symbol
Electronic configuration

…………
             13
………..
…………………..

………….
             11
………….
…………………..

											3mks
 c.	List the end products of photosynthesis					1mk