SCIENCE 2006

SECTION A

Choose the correct answer and then write the appropriate letter in the front of each question in your answer sheet.

1. Which of the following represents a physical change?

1. Water to be steam
2. Burning paper
3. Honey turns into alcohol
4. Iron to get rusty 
5. Wood to be charcoal

2. One of the listed below helps to preserve the environment and is:

1. cutting down trees for firewood and building;
2. crop rotation;
3. using chemical fertilizer; 
4. clearing fields by tilling;
5. Grazing cattle in large numbers.

3. What is the hardest mineral?

1. Diamonds
2. Coal 
3. Copper 
4. Mica 
5. Gold

4. Meat, fish, milk and eggs are foods of:

1. Energy giving
2. to defend the body 
3. body building 
4. warming the body 
5. perishable and hard to preserve

5. Plants absorb water and mineral salts in the form represented by the letter L in the following diagram. What is that method?

1. water and mineral flow
2. translocation
3. phototropism
4. Osmosis
5. photosynthesis

6. Wheel axle is a machine.........

1. complex used to lift things up
2. solid held by a small wheel
3. with interlocking teeth of another wheel
4. easy to use to lift things up 
5. Which is used to lift heavy objects?

7. Which number in the diagram below represents a hormone-releasing gland that prevents a person from getting diabetes?

1. 1
2. 2
3. 3
4. 4
5. 5

8. The ship floats in the water (sea or lake) because it contains:

1. a large hollow space inside
2. a little airy space
3. lighter than water
4. waterproof plaster line
5. it is less dense than water

9. This experiment (carefully examine the following diagram) reveals that light 

1. travels and divides objects into two parts
2. travels in a straight line
3. travels and bends as you go through different media
4. it travels in the water by bending
5. travels and causes things to bend

10. The bicycle chain passes through two gears (see diagram below). The gear that moves the hind tires has 20 teeth and the one attached to the pedal has 50 teeth. If the pedals make two rotations, the hind tire will rotate .........times

1. Five 
2. Four 
3. Three
4. one
5. Many

11. The parts that make up the circulatory system are the blood itself,

1. brain and blood vessels 
2. lungs and blood vessels
3. heart and blood vessels 
4. heart and sensory nerves
5. heart and brain

12. The weight of the load x in the following diagram is:

1. 200 kg
2. 2.5 kg
3. 25 kg
4. 250 kg
5. 36.5 kg

13. The act of breaking down and changing food so that it can be absorbed in the body is known as

1. digestion 
2. fertilization
3. absorption
4. excretion
5. respiration

14. Observe the following diagram carefully. Whose particles are more loosely packed?

15. Which of the following diseases is caused by vitamin deficiency?

1. Tuberculosis 
2. scurvy
3. Chickenpox 
4. Malaria
5. Diarrhea

16. Magnetism can be removed by doing the following:

1. Hitting and heating while hanged east-westwards
2. Hanging East-Westwards and washing it
3. Coiling it and then allowing an electric current to pass through it
4. Coiling it and then burning it
5. Hitting it and then coiling it

17. Fishing with dynamite fishing is one way to:

1. promoting science
2. ways of killing water hyacinth that litter the water
3. destroying fish stocks and polluting the environment
4. removing large fish species
5. to chase away wild sharks from eating small fish

18. The part shown with the letter Z in the following diagram is called

1. nucleus
2. vacuole
3. cytoplasm
4. cell wall
5. epithelium

19. Which of the following diseases can be prevented by vaccination?

1. Whooping cough
2. Gonorrhea 
3. Malaria 
4. typhoid
5. Cholera

20. Which of the following acts promotes soil erosion?

1. Raising a lot of livestock and cutting down trees
2. terracing farming and grass spreading
3. non-terracing and irrigation
4. Raising a lot of livestock and planting trees 
5. Planting trees and burning fields