SCIENCE 2007

SECTION A

Choose the correct answer and then write the relevant letter in front of the number of each question on the answer sheet.

1. The importance of carbohydrate foods in the body is

1. Body building
2. Protect the body 
3. Strengthening 
4. Ability to think 
5. Increase heat

2. If you were in a dark room and suddenly the light came on what would happen to the eye?

1. The pupil will increase in size
2. The pupil of the eye will remain the same
3. The lens of the eye will change
4. The pupil will decrease in size
5. Loud noise will be heard

3. Dry cough, fever, night sweats and coughing up blood are symptoms of. . . . . .

1. Tuberculosis 
2. Smallpox 
3. Tetanus
4. Typhoid 
5. Epilepsy

4. The diagrams in Figure 1 represent cells in the human body whose functions are:

1. Prevent and protect the body against diseases
2. Transporting oxygen
3. To clot blood 
4. Adjust body temperature 
5. Transporting waste in the body

5. What disease is a person with obesity likely to get?

1. Heart and high blood pressure
2. Cancer 
3. Marasmus
4. mental retardation
5. Kwashiorkor

6. Manure and other decayed plant and animal things

1. It makes the soil unsuitable for agriculture
2. They invite other pests to destroy crops
3. They add compost to the soil 
4. They have no significance in soil
5. They are used as fish prey for fishermen.

7. Light and sound have only one characteristic. What is that characteristic?

1. Refraction
2. Reflection 
3. Absorption
4. Passing through a vacuum 
5. Dispersion

8. Storing foods in the refrigerator is a way that.

1. It makes foods last longer without spoiling
2. It reduces the work of cooking severally
3. It loses its flavor and makes them rot if it stays for long
4. turning food into ice
5. Reduces the cost of going to the market.

9. If you put a 20 shilling coin in a basin with water, the coin looks like it has bend on top. This situation happens because.........

1. The coin is light
2. Eyes have problems
3. The light is straight 
4. Water is little
5. A ray of light bends as it enters in the water

10. Why are soda and beer bottles not filled to the brim?

1. For gas space
2. Helps close bottles easily
3. Allow to expand during hot weather
4. Reduce costs
5. When filled it can spill into the drinker

11. Active volcanoes produce heavy liquid on the earth's surface called:

1. Lava 
2. Crater
3. Gas 
4. Volcano 
5. Water

12. Why do light usually appear first before lightning, even though both occur at the same time?

1. Light has bigger waves than sound
2. The optic nerve works faster than the sensory nerves
3. The speed of light is faster than that of sound
4. Light and sound usually travel vertically 
5. Sound waves do not travel in the air

13. Which among the following things can cause air pollution?

1. Industrial wastewater, alcohol and commercial construction
2. Smoke, Ash and Fertilizers
3. Industrial smoke and the results of burning petrol
4. Natural forests, industries and fertilizers
5. Fertilizers, compost and industrial wastewater

14. Which of the following creatures lives in the water?

1. Flies 
2. Spiders 
3. crab
4. Grasshopper
5. cockroach

15. The growth of mosquitoes goes through four main stages. The proper flow of such growth is. . . . . . . . .

1. Egg, pupa, larva, mosquito 
2. Pupa, egg, larva, mosquito
3. Egg, larva, pupa, mosquito 
4. Larva, egg, pupa, mosquito
5.  Pupa, larva, egg mosquito

16. The act of a plant following light in Figure 2 is called.........

1. Walking
2. Growing
3. Moving
4. Respond to the stimuli
5. Feeling

17. The source of food for animals is.........

1. Plant
2. Plants and meat
3. Plants for herbivores and meat for carnivores
4. Milk 
5. Beans

18. Cooking utensils have handles made of wood and plastic because....

1. It does not pass heat quickly
2. It does not pass heat
3. They absorb heat
4. It reflect heat 
5. Keeps heat for a long time

19. The walls, coins, and ceiling of the broadcasting hall have been fitted with soft things in order to.

1. Reduce sound
2. Reflect
3. Increase sound and power
4. make the sound soft and clean
5. Reduce echo

20. What is the relationship between magnetism and electricity?

1. They are all chemical energy
2. They are all electrical circuits
3. Wherever there is magnetism there must be electricity
4. Wherever there is electricity there must be a magnetism
5. Both provide light energy