STD VII SCIENCE ONLINE SELF NECTA TEST FOR YEAR 2012
THE UNITED REPUBLIC OF TANZANIA NATIONAL EXAMINATIONS COUNCIL PRIMARY SCHOOL LEAVING EXAMINATION
05E SCIENCE
Time: 1:30 Hours Wednesday, 19th September 2012 a.m
Instructions
This paper consists of fifty (50)questions.
Answer allthe questions.
Read all the given instructions in the special answer sheet (OMR)and fill in allthe required information.
Write your Examination Numberand then shade the digitsof the number in the respective place in your answer sheet.
Shadethe letter of the correct answer for each question in the answer sheet provided, for example, if the correct answer is A shade as follows:
If you have to change your answer, you must rub out the shading very neatly• before shading the new one. Use a clean rubber.
Use HB pencilonly.
Cellular phones are not allowedin the examination room.
Choose the correct answer and shade its letterbeside each question in the answer sheet provided.
1. In order to sustain a healthy body we are supposed to
do physical exercise, eat quality food and rest
sleep for a long time, eat quality food and play
avoid tough work, do physical exercise and sleep
do physical exercise and participate in sports and games
eat well and do physical exercises all the time.
Choose Answer
2. Which of the following is an important nutrient for a pregnant woman toget in large quantities?
Protein
Carbohydrates
Fats
Mineral salts
Vitamins.
Choose Answer
3. Urinating frequently, producing large quantities of urine and frequent thirst are symptoms of which disease?
Cancer
Diabetes mellitus
Kwashiorkor
Whooping cough
Anaemia.
Choose Answer
4. Which of the following is most appropriate in helping a person who has touched a bare live electric wire and is experiencing an electric shock?
Quickly push him/her away with bare hands
Pull out the electric wire causing shock
Put off the electricity by using water
Pull him/her away by using insulated materials
Leave him/her till the power is cut off automatically.
Choose Answer
5. _________ is a disease which if left untreated for a long time causes heart and brain problems or even death.
Chlamydia
Gonorrhoea
Trichomona
AIDS
Syphilis.
Choose Answer
6. Which of the following is nota symptom of AIDS?
Swollen lymph nodes
Loss of weight
Persistent diarrhoea
Unusual prolonged coughing
Unusual sweating during night.
Choose Answer
7. The following are the ways of preventing hazards in the environment except
digging trenches
building houses far from volcanic mountains
having food storage
living nomadic life
maintaining cleanliness in our environment.
Choose Answer
8. Which of the following is a mixture of different gases?
Light
Air
Kerosene
Carbon dioxide
Vapour
Choose Answer
9. Which of the following isnota cause of environmental degradation?
Burning of papers
Industrial development
Bathing in the lake
Use of farmyard manure
Car washing along rivers.
Choose Answer
10. The King of the forest commanded that all animals which eat meat must be killed. What do you think will happen to the forest after many years?
Plants will grow in larger quantity
The number of insects will not change
Plants will decrease
Animals eating plants will decrease
The environment will remain in a good and attractive condition.
Choose Answer
11. Natural forces cause one of the following changes in the environment:
Disappearance of fishes
Earthquake
Increase of plants
Shortage of electricity
Drying of rivers.
Choose Answer
12. Which of the following is not the right way of maintaining soil fertility in a farm?
Crop rotation
Growing leguminous plants
Leaving the land uncultivated
Applying fertilizers
Growing the same crop consecutively.
Choose Answer
13. How many major stages of growth does a frog undergo?
One
Seven
Six
Five
Eight.
Choose Answer
14. Which of the following insects undergoes incomplete metamorphosis?
Mosquito
Butterfly
Housefly
Bee
Cockroach.
Choose Answer
15. A rat which was kept in a cage containing a piece of meat died after two days.Why did the rat die?
Ate the rotten meat
Lacked carbon dioxide
Lacked oxygen
Lacked enough water after eating the meat
Lacked light which is essential for the growth of animals.
Choose Answer
16. Which of the following organisms is an amphibian?
Frog
Rat
Lizard
Tortoise
Chameleon.
Choose Answer
17. Animals like crocodiles, hippopotamus and frogs live in what kind of habitat?
In the sky and on the land
On the land and in water
Any kind of environment provided there is food
On the land and in caves
In the forests.
Choose Answer
18. During pollination, pollen grains move from
ovary to the ovules
stigma to the anthers
petal to the stigma
anthers to the stigma
sepals to the style.
Choose Answer
19. There are two types of plant seeds known as
main cotyledon and minor cotyledon
monocotyledon and dicotyledon
dicotyledon and main stalk
seeds with roots and seeds without roots
natural seeds and wild seeds.
Choose Answer
20. Thunderstorm light rays can be seen before hearing the sound of the thunderstorm because
light rays cannot be prevented by anything
sound is absorbed by the clouds
light rays travel faster than sound waves
sound waves travel faster than light rays
clouds which produce sound travel slowly.
Choose Answer
21. When two pieces of cloth of the same material are washed, one black and the other white in colour, the black one will dry faster than the white one because it
absorbs heat fast
reflects light fast
absorbs moisture fast
can withstand blowing wind
has the ability to filter water.
Choose Answer
22. Which of the following sets represents liquids?
Air, water and copper
Petrol, ice and nitrogen
Gold, hydrogen and mercury
Petrol, mercury and water
Water, petrol and air.
Choose Answer
23. Observe Figure 1 below then answer the question that follows.
This symbol in electricity represents
resistance
dry cell
voltmeter
switch
bulb.
Choose Answer
24. An accumulator is a combination of cells connected together to produce directcurrent which is used in
bicycles, pressing iron and telephone
cars, tractors and telephones
refregirator, pressing iron and fan
bicycle, refregirator and electrical cooker
dry cell, charcoal cooker and pressing iron.
Choose Answer
25. Study Figure 2 which shows two people, P and Q lifting loads of equal weight to the roof then answer the question that follows.
Who will lift the load more easily?
P because he is on the ground
Q because he will apply less force
Q because he is on the roof
P because there is one roller
Q because the gravitation pull is less.
Choose Answer
26. The ability to move something from one point to another is known as
balance
force
friction
work
gram.
Choose Answer
27. When a pencil is placed in a glass containing water, the pencil appears bent due to the
refraction of light
reflection of light
dispersion of light
ability of water to pass light
density of water.
Choose Answer
28. Milk can be processed to make which of the following products?
Cheese and soap
Fruits and baking powder
Cheese and fruits
Cake and butter
Cheese and butter.
Choose Answer
29. The natural sources of energy in the daily life are
fire wood, fire and water
electricity, magnet and natural gas
fire wood, sun and wind
fire, wind and magnet
electricity, wind and water.
Choose Answer
30. Observe Figure 3 and select the correct answer about the experiment.
The purpose of the experiment shown in Figure 3 is to demonstrate:
Boiling drinking water
Cooling of water
Expansion and contraction of gas
Cooling of gas
Producing oxygen gas.
Choose Answer
31. Which of the following is a physical change?
Fermentation of milk
Burning of papers
Water to steam
Reaction between acid and base
Decaying of plants.
Choose Answer
32. Careful observe figure 4 and answer the following question
The purpose of the experiment in Figure 4 is to find the
volume of a eureka can
amount of air in the eureka can
area of the stone
circumference of the stone
volume of the stone.
Choose Answer
33. To prevent hazards causedby science and technological inventions, everynation should
cooperate with scientists
have a Ministry of Science and Technology
do away with science and technological inventions
acquire technological inventions from developed nations
formulate policies that guide the use of science and technology
Choose Answer
34. Which of the following is used to predict the problem in scientific investigation?
data collection
hypothesis
data analysis
conclusion
recommendations.
Choose Answer
35. People who go to the moon must
carry firewood for cooking food
carry oxygen gas and food
be careful from dangerous animals
carry enough carbon dioxide gas and food
carry carbon dioxide gas and water.
Choose Answer
36. The following measurements of heights for six plants were obtained in are search:12 cm, 16 cm, 6 cm, 20 cm, 14 cm and 10 cm. The average height was
12 cm
14 cm
11 cm
13 cm
17 cm
Choose Answer
37. The main artery is divided into smaller vessels known as
vena cava
bronchiole
valves
capilaries
veins.
Choose Answer
38. Haemoglobin is a compound found in blood within
white blood cells
red blood cells
blood plasma
yellow bone marrow
cells that cause blood clotting.
Choose Answer
38. Haemoglobin is a compound found in blood within
white blood cells
red blood cells
blood plasma
yellow bone marrow
cells that cause blood clotting.
Choose Answer
40. Which of the following animals brain is most complex?
Man
Horse
Hare
Chimpanzee
Monkey.
Choose Answer
41. Rust is a result of the chemical reaction:IRON + Y + WATER.Letter Y stands for
oxygen
nitrogen
moisture
carbon dioxide
acid.
Choose Answer
42. Which of the following is made of very small particles?
Gas
Liquids
Blood
Dry cell
Matter.
Choose Answer
43. Which of the following causes anaemia in the human body?
Lack of vitamin
Lack of iron
Lack of calcium
Lack of protein
Lack of phosphate.
Choose Answer
44. When cooking green vegetables we are advised to
add some soda ash to ensure that it is well cooked
cook for a long time to reduce amount of water in it
cover and cook for a short time
dry before cooking
fry using excessive cooking oil.
Choose Answer
45. Which of the following is caused by excessive carbohydrates in the body?
Obesity
Malnutrition
Kwashiorkor
Marasmus
Goitre.
Choose Answer
46. In her experiment, Shida passed light ray through a plane mirror as shown in Figure 5.
The size of angle Y is
180°
35°
70°
90°
E 105°
Choose Answer
47. Which of the following is caused by friction?
Heat
Things to fall
Things to slide
Velocity
Force.
Choose Answer
48. The shape of the fish helps it to
breath
swim
hunt
reproduce
hide.
Choose Answer
49. Which of the following organisms live in water?
Bacteria, virus and fungus
Sardine, octupus and bacteria
Bacteria, virus and octupus
Sardine, octupus and water lilies
E Bacteria, virus and water lilies.
Choose Answer
50. Culex is a type of mosquito which spread worms known as filaria that cause the following disease: