STD VII SCIENCE ONLINE SELF NECTA TEST FOR YEAR 2011
THE UNITED REPUBLIC OF TANZANIA NATIONAL EXAMINATIONS COUNCIL PRIMARY SCHOOL LEAVING EXAMINATION
05ESCIENCE
Time: 1:30 HoursWednesday, 7th September 2011 aan.Instructions
This paper consists of fifty (50) questions.
Answer all questions.
All answers must be written in the answer sheet provided.
Cellular phones are not allowed in the examination room.
Write your Examination Number on your answer sheet.
Use blue or black pen in writing your answer. Answers written by pencil will not be marked.
Choose the correct .:answer and. write its le `ter beside the questien number in the answer sheet provided.
1. The instrument used to observe cells of living things is called
Telescope
Periscope
Microscope
Camera
Horoscope.
Choose Answer
2. The sense organ which is used to detect the degree of hotness or coldness is
tongue
ear
eye
nose
skin.
Choose Answer
3. Which of the following is a mammal?
Pigeon
Hen
Duck
Bat
Snake.
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4. Figure 1 shows a dicotyledonous seed.
Which of the letters in Figure 1 indicates the part that grows into a root?
H
J
K
L
M.
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5.What will happen if the flowers of the maize plant are removed?
The plant will flourish
The plant will die
The roots of the plant will not grow
The leaves will change its color
The plant will not reproduce.
Choose Answer
6.The following are necessary for the formation of carbohydrates in plants.
Oxygen, chlorophyll and water
Carbon dioxide, water and sunlight
Oxygen, carbon dioxide and water
Chlorophyll, water and sunlight
Chlorophyll, starch and sunlight.
Choose Answer
7 The excretory products from the lungs are
Oxygen and water
Oxygen and carbon dioxide
Carbon dioxide and water
Carbon dioxide and salt
Oxygen and salt.
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8. Which of the following transfers pollen grains from the stamen to the stigma?
Man
Insects
Water
Dew
Style.
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9. A person who does not eat fruits and green vegetables is likely to face which of the following problems?
Suffer frequent illness
Decrease in body weight
Increased appetite to eat meat
Color of the skin become yellow
Increase in body weight.
Choose Answer
10. A child with kwashiorkor is lacking food rich in
vitamin
fat
minerals
starch
rotein.
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11. Water snails spread disease known as
bilharzias
tetanus
cholera
measles
elephantiasis.
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12. The main vessel which take blood from the heart is known as
vein
aorta
vena cava
pulmonary
hepatic.
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13. The hormone which regulates oxygen intake in the human respiratory system is known as
adrenaline
insulin
thyroxin
estrogen
amylase.
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14. Under normal circumstances, the difference between inhaled air and exhaled air is that exhaled air contain a lot of
oxygen
hydrogen
water
nitrogen
carbon dioxide.
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15. Disease known as goiter is caused by the deficiency of
Iron
Iodine
Calcium
Potassium
Phosphate.
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16. Beriberi disease is caused by deficiency in vitamin
B1
B2
D
C
A.
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17. Fish breath through
nose
mouth
fins
gills
scales.
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18. Food that has been digested in the small intestine is distributed to other parts of the body through
water
oxygen
blood
diffusion
absorption.
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19. Which type of fooci among the following is responsibe for repaiiirig human body cells?
Fat
Starch
Fruits
Protein
Minerals.
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20. Why is family planning important to the family?
It enables the family to own a house
It increases the number of children
It enables the family to travel together
It makes the family members happy
It enables the family to get enough food.
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21. First aid is the treatment given to
people who are suffering from known illnesses
the sick person after being discharged
show the doctor's expertise in treatment
the person before being taken to hospital
show the tasks performed by Red Cross.
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22. The purpose of spreading honey on a fresh burn wound is to
decrease severe pains
give energy to the body
provide first aid treatment
protect the wound from getting dirty
prevent contraction of tetanus.
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23. A person who is vomiting is given which of the following as first aid?
Boiled milk
Juice prepared from lemon
A solution of sugar and lemon
A solution of sugar and salt
Rest in a cold and quiet place.
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24.Which of the following are necessary for giving first aid to a person with bone fracture without a wound?
Scissors, bandage, splinter, thread and safety pin
Towel, soap, stretcher, cotton wool and spirit
Towel, water, oil, splinter and soap
Blanket, chair, soap, rope and scissors
Blanket, bandage, splinter, scissors and rope.
Choose Answer
25. After providing first aid to an injured person, the person should be
given enough drinking water
sent to a hospital for treatment
given mouth to mouth ventilation
laid down under a tree shade
given complete bed rest
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26. The chemical break down of proteins begins in the
mouth
stomach
rectum
large intestine
small intestine.
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27. The first aid suitable to a person who has taken poison is to
make him vomit
give him milk to drink
provide him with medicine
give him drinking water
provide him with glucose.
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28. Matter can exist in the following states
Liquid, water and gas
Solid, liquid and air
Solid, liquid and gas
Stones, solid and gas
Solid, air and gas.
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29. By which of the following methods can salt that has dropped in a bucket of water be separated?
Filtering the mixture
Filtering the solution
Evaporating the solution
Boiling the mixture
Evaporating the mixture.
Choose Answer
30. In soap manufacturing, sodium hydroxide is mixed with boiling fat. If sodium hydroxide is not available, which one of the following can be used?
Ash from leaves
Solution of lemon
Cassava flour
Coconut oil
Pawpaw leaf extract.
Choose Answer
31. Melting of ice refers to which type of change?
a chemical change
a physical change
an environmental change
a biological change
a physiological change.
Choose Answer
32. The natural way of fertilizing the soil is to
mix cow dung with artificial fertilizers
burn all trees which dry water sources
burn leaves and remains of maize plants
reduce the number of cows grazing on the land
cultivate leguminous crops by rotation.
Choose Answer
33. The simplest method of changing hard water to soft water is to
use water cleaner
dilute the water
boil the water
melt the solid portion
filter the solids.
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34. Which of the following can be separated by magnet?
Iron particles and sand
Flour and pieces of paper
Plastic pins and sand
Glass particles and sand
Sand and rice.
Choose Answer
35. Changes of weather and water are agents which help
the soil surface to look good
animals to adapt themselves
plants and animals to exist
to speed soil erosion
to balance food chain.
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36. The gas which supports combustion is
hydrogen
nitrogen
ozone
natural gas
oxygen.
Choose Answer
37. Observe Figure 2 carefully and then answer the question that follows. 10 cm 8 cm
Figure 2
Find the value of X in Figure 2.
250 gm
280 gm
437.5 gm
240 gm
175 gm.
Choose Answer
38. The inside walls of a thermos flask have silver coating in order to avoid loss of heat through
conduction
reflection
convection
refraction
radiation.
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39. The retina of the eye is similar to which part of the camera?
Film
Lens
Bulb
Switch
Focus.
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40. Heat is transferred in solid matter through
conduction
convection
radiation
vibration
absorption.
Choose Answer
41. In machines the mechanical advantage is the ratio between
force exerted at the fulcrum to the force exerted by the load
the distance from the fulcrum to the distance where the load is placed
force exerted by the load to the force exerted at the fulcrum
the distance from the load to the distance where the fulcrum is placed
the force applied at one point to the force at the other point in the machine.
Choose Answer
42. Identify the mirror which gives an upright image that resembles the real object and is at equal distance from the mirror to the image and to the real object.
Concave mirror
Biconcave mirror
Convex mirror
Prism mirror
Plane mirror.
Choose Answer
43. The electric current in the circuit is 2 amperes. If the voltage in the circuit is 4 volts the resistance will be
3.5 ohm
4 ohm
2 ohm
5 ohm
0.5 ohm.
Choose Answer
44. Observe the electric circuit shown in Figure 3 and then answer the question that follows.
Figure 3
What is the name of the circuit shown in Figure 3?
Series circuit
Parallel circuit
Resistance circuit
Alternating circuit
Low tension circuit.
Choose Answer
45. Venereal diseases are spread by
touching one another
blood transfusion
playing together
sharing cups
sexual intercourse.
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46. Which blood cells in human body are attacked by HIV?
Red cells
Platelet cells
White cells
Sickle cells
Plasma cells.
Choose Answer
47. The proper method of preventing people from getting HIV is to
stop drinking alcohol
avoid unprotected sex
participate in religious preaching
distribute drugs to the victims
publicize the names of the victims.
Choose Answer
48. Which of the following sentences is true about HIV/AIDS?
HIV is spread by mature people only
Healthy looking people do not have HIV
HIV/AIDS affect people of all ages
All people suffering from cancer have HIV
Vaccination prevents contraction of HIV.
Choose Answer
49. The service that needs to be given to people living with HIV is to
give them houses for living
give them financial assistance
give them counseling
give them free education
to assist them in opening bank accounts.
Choose Answer
50. In scientific investigation data collection is done by