This document is a general science exam for 8th grade students containing 60 multiple choice questions testing knowledge of various science topics including: - Units of measurement and scientific notation - Properties of matter and the periodic table - Chemical formulas and reactions - Anatomy and physiology of human body systems - Reproduction and disease - Ecology and food webs - Planets and astronomy - Light and sound - Electricity and magnetism The exam covers a wide range of fundamental science concepts to evaluate student understanding of core ideas taught in the 8th grade general science curriculum.

1. 2015 E.C Galaxy Academy Second Semester General Science Model Exam for Grade 8
Name-------------------------------------------Rol.No--------------------------Grade & Section
I. Choose the correct answer only from the given alternatives.
1. Which one of the following indigenous units used to measure length in Ethiopia?
A. Hand-span B. cubit C. arm span D. All
2. All of the following questions are derived except? A. volume B. speed C. mass D. density
3. The sum of 5KG, 600g and 27 mg is equal to ----- gram? A. 5627mg B. 5600.27g
C.5627 X 103
g D. 4625mg
4. All of the following physical quantities are wrongly matched with their SI unit, except?
A. Temperature-Pascal C. Mass- Kilogram
B. Volume- Meter D. density- cubic meter
5. What is an equivalent kilometer for 20 meters? A. 2 x 103
B. 2 x 10-3
C. 2 x 10-2
D. 2 x 10-4
6. Which refers to how close a measurement is to its accepted or known as Value?
A. Precision B. accuracy C. instrument D. measurement
7. The scientific notation that represents Mega(M) prefix is --------- A. 1 x 106
B. 1 x 10-6
C. 1 x 109
D. 1 x 10-9
8. The prefix for a number 0.000,001 is ---------- A. Mega(M) B. Micro(µ) C. milli D. Centi
9. All of the following choose holds true about continuous theory of matter except?
A. Matter is infinitely divisible C. believes in the existence of atom
B. It reject the idea of atoms D. proposed by Aristotle
10. Which molecule is mono atomic? A. S8 B. O3 C. N2 D. He
11. How many neutrons are there in an atom of the element
𝟐𝟑
𝟏𝟏
Na A. 11 B. 23 C. 13 D. 12
12. Which molecule of a compound is wrongly matched with its name? A. NH3- ammonia B. CO2-
Carbon dioxide C. CO- carbon dioxide D. HCL- hydrochloric acid
13. All of the following molecules are polyatomic, except? A. O3 B. O2 C. P4 D. S8
14. Which of the following compound is organic? A. Nacl B. C12H22O6 C. CaO D. A and C correct
15. The formulas of alkane that contain 9- carbon atoms
A. C9H20 B. C9H18 C. C9H16 D. C9H22
16. Which organic compound is correctly matched with its use?
A. Methane (CH4) – as domestic fuel C. ethyn(C2H2)
B. Propane(C3H8) – as cooking and heating D. all
17. What is the missing product “X” in the following equation? A. CaO + CO2 X
A. CA(OH)2 B. Ca2SO4 C. CaCO3 D. CaCO2
18. What is the missing product “Y” in the following reaction?
H2SO4 + 2NaOH Y + H2O ?
A. Na B. Na2SO4 C. SO4 D. H2SO3
19. Nitrates are salt of A. nitric acid B. phosphoric acid C. sulphuric acid D. hydrochloric acid
20. Which of the following body part is not integumentary? A. hair B. skin C. glands D. lung
21. Which layer of hair staff is correctly matched with its explanation?
A. Medulla-deepest layer and only seen in large and thick hair
B. Cortex- middle layer and provide strength, color and texture of hair fiber
C. Cuticle- outer layer of hair shaft & is thin and colorless
D. All of the above
22. The gland which is located in ear canal and it produce ear wax for protection is ------
A. Sudoriferous B. sebaceous C. germanous D. mammary
23. The middle layer of the skin is called -------A. dermis B. hypoderms C. epidermis D. endodermis
24. All of the following are major skin disease and disorders except A. Acne B. Rosacea C. Exzema
D. none

2. 25. Which one of the following is not common for all muscle? A. contractility B. excitability C.
extensibility D. none
26. Which type of bone is correctly matched with its typical examples?
A. Long bone-upper and lower limb C. flat bone-ribs, sternum, scapula
B. Short bone-wrist, finger, ankle bone D. all of the above
27. Which components of muscular systems are the only muscles that can be consciously or voluntarily
controlled? A. skeletal muscle B. smooth muscle C. cardiac muscle D. none
28. All are true about cardiac muscle, except? A. located only in the heart B. pumps blood around the
body C. they are auto rhythmic D. they are voluntary
29. Which is not among major disease of skeletal system? A. leukemia B. osteopenia C.
hypertension D. fracture
30. An organism have I =
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𝟑
, C=
𝟐
𝟐
, P =
𝟑
𝟑
M =
𝟐
𝟐
then what is the total number of teeth
the organism have A. 34 B. 40 C. 38 D. 32
31. Millions of air sac in lung in which the exchange of oxygen and carbon dioxide takes place is
called_________________.
A) Alveoli B) bronchus C) blood vessel D) trachea
32. The circulation of blood only between heart and lung and lung to heart is called__________
A) Systematic B) pulmonary C) umbilical D) all
33. The only vein that carry oxygenated blood is called_____________
A) Umbilical B) pulmonary C) A and B D) large vein
34. Which male reproductive organ stores sperm cells for maturation?
A) Testes B) scrotum C) vas deferens D) epididymis
35. Which of the following female reproductive structure is a narrow from the ovary to uterus for
movement of an egg and a site for fertilization?
A) Womb B) uterus C) fallopian tube D) cervix
36. All of the following characteristics are female secondary sexual characteristics development,
Except?
A) Widening of hips B) larynx enlarges and cause voice deepens C) voice becomes thinner
D) breast developments
37. Which sexually transmitted/venereal/ disease is viral?
A) HIV/AIDS B) chancroids C) gonorrhea D) all
38. Male sex hormone that produced during puberty is____________________.
A) Estrogen B) testosterone C) progesterone D) sperm
39. Which biological interaction /Symbiosis/ is the obligatory relationship in which both organisms are
get benefitted?
A) Commensalism B) parasitism C) mutualism D) competition
40. All organisms are photo autotrophs, Except?
A) Green plants B) nitrifying bacteria C) green algea D) All
41. Heterotrophic mode of nitration consists all of the following except?
A) Herbivores B) carnivores C) decomposers D) plants
42. An organism that release energy from simple chemical reactions is said to be________
A) Decomposers B) heterotrophs C) photoautotrophs D) chemoautotrophs
43. The food chain that contain more than one chain is called_____________
A) Interaction B) relation C) food web D) nature cycling
44. Which planet is not among jovian planets?
A) Saturn B) Mercury C) Jupiter D) Uranus
45. All of the following planets are dwarf planets, Except?
A) Neptune B) Pluto C) Eris D) make make

3. 46. Most asteroids are found in the asteroid belt, which lies between the obrbits of________and____.
A) Mars and Jupiter B) Earth and Mars C) Jupiter and Saturn D) Mercury and Venus
47. Small heavenly bodies that revolve around the sun in highly elliptical orbits are called
A) Comets B) Metros C) Asteroids D) Pole stars
48. The bending of light raise as it travel from one medium to another is said to be ________?
A) Reflection B) rectification C) Refraction D) Reduction
49. Which of the following object is luminous?
A) Sun B) Moon C) Earth D) Mountain
50. Which light phenomenon is correctly matched with its explanation?
A) Reflection:- rebouncing back to the first medium by the obstacles
B) Refraction:- bending of light raise as it travels from one medium to another
C) Dispersion:- the splitting of white light into constitvent colors.
D) All of the above
51. All of the following are imaging tools used by doctors to diagnose ingury or illness, except?
A) Magnetic resonance imaging B) X-ray C) Telescope D) CT-scan
52. Which body part of human being is said to be imaging tool and it form a real image.
A) Eye B) ear C) brain D) heart
53. Which characteristics of the image formed by aplane mirror is correct?
A) The image is virtual and erect B) the image is the same size at as that of the object C) the image
is latterly inverted D) All
54. Which noise can cause immediate harm to your ears?
A) Loud noise above 120db B) average homo noise 40db C) soft music whisper 30db D) normal
conversation 60 db
55. Sound cannot travel through_____________
A) Air B) solids C) water D) vacuum
56. The direct transfer of heat from one substance to another substance that is touching is referred to as
A) Convection B) radiation C) conduction D) insulation
57. The circuit symbol of diode is A) B) C) D)
58. Which of the following is not true about magnetic field lines around a bar magnet?
A) magnetic field lines intersect one another B) magnetic field lines start from north pole and end up
at south pole outside of the magnet C) the field is strong where the lines are closest together D)
magnetic field lines form each closed loop.
59. Which one of the following material is magnetic?
A) Iron B) cobalt C) nickel D) all
60. Magnets are used in one of the following devices
A) Telephones B) hair driers C) televisions D) all of those
Good Luck!
Set by T.S