Science Questions and Answers - Class 8 End Term Exams Term 1 2023 Set 6

QUESTIONS:

1. Three of the following are functions of the skin except one. Which one is it?
   1. Filters and removes urine from blood
   2. Acts as an excretory organ
   3. Protects the body from germs
   4. Acts as a sensory organ
2. The following activities take place in the human reproductive system. Which one is wrongly matched with where it takes place?
   1. Fertilisation  -   fallopian tube
   2. Implantation - uterus
   3. Ovulation  - Ovary
   4. Fusion - vagina
3. The diagram below shows a certain blood vessel.
   
   Which one is not a characteristic of the blood vessel shown above?
   1. Blood flows slowly and in low pressure
   2. Has wide lumen
   3. Has a pulse
   4. Found near the surface of the body.
4. Ananias lost his molar teeth in an accident and went to the hospital for replacement. Which one of the following artificial teeth were fitted on his gum
   1. Dentures
   2. Permanent
   3. Deciduous
   4. Wisdom teeth
5. Absorption of the digested foods into the blood stream takes place in the
   1. rectum
   2. large intestine
   3. stomach
   4. small intestine
6. Which one of the following is the most effective method that a person can use to prevent chancroid disease?
   1. Abstinence in couples
   2. Having multiple partners
   3. Visiting voluntary counseling testing
   4. Being faithful to one sexual partner
7. The following are effects of HIV and AIDS to the nation. Which one is not?
   1. Lack of trained personnel
   2. High number of school dropouts
   3. Lack of self esteem
   4. Congestion in hospitals
8. Typhoid can best be prevented by
   1. proper hygiene
   2. boiling drinking water
   3. drinking water that has been filtered
   4. wearing gumboots when walking in stagnant water.
9. The experiment below was carried out by class five pupils. 
   
   The experiment was set to investigate
   1. convection in gases
   2. conduction
   3. convection in liquids
   4. radiation
10. Which one of the following is not an importance of brushing the teeth?
    1. To give one fresh breath
    2. To maintain unhealthy disease
    3. To prevent gum disease
    4. To remove food particles from teeth.
11. The following signs were shown in an HIV patient.
    • tested HIV positive
    • looked normal and healthy
      Which stage was the patient undergoing?
      1. Window stage
      2. Symptomatic stage
      3. Full blown stage
      4. Incubation stage
12. All the following are signs of unhealthy crop except
    1. curled leaves
    2. stunted growth
    3. discolouration
    4. reduced quality of produce
13. Three of the following green plants have fibrous roots except
    1. wheat
    2. mango
    3. oats
    4. barley
14. Plants growing in dry areas have the following adaptations except
    1. thick cuticle
    2. deep roots
    3. broad leaves
    4. shedding leaves
15. Which one of the following plants is not green?
    1. Pine
    2. Cedar
    3. Cypress
    4. Toadstool
16. Which one of the following is not an example of a beverage crop?
    1. Tea
    2. Coffee
    3. Cocoa
    4. Flax
17. Which one of the following is not true about plants?
    1. Flowers produce fruits and fruits contain seeds
    2. Water, carbon dioxide and minerals are raw materials for photosynthesis
    3. Oxygen is necessary for photosynthesis
    4. The main reproductive organ of a plant is the flower
18. Which one of the following is not a method of rotational grazing?
    1. Strip grazing
    2. Tethering
    3. Herding
    4. Paddocking
19. Which pair of characteristics is common to lizard, toad, hawk and duck billed platypus?
    1. Lay eggs, have scales
    2. Breathe by lungs, lay eggs
    3. Have scales, varying body temperature
    4. Breathe by lungs, have varying body temperature
20. One of the following is an egg laying mammal. Which one is it?
    1. Bat
    2. Whale
    3. Porpoises
    4. Spiny anteater
21. Three of the following pairs of parasites are correctly grouped according to where they are found. Which one is not?
    1. Mites, lice
    2. Tsetse flies, lung worms
    3. Liver flukes, hookworms
    4. Ticks, fleas
22. The diagram drawn below represents a thermometer.
    
    The instrument drawn above works on the principle that
    1. matter has weight
    2. liquids expand when heated and contact when cooled
    3. gases expand when heated and contact when cooled
    4. matter occupies space
23. Which one is a unit for measuring weight?
    1. Force                  Newton
    2. Temperature       Grams 
    3. Air pressure        Millibars
    4. Rainfall               Millimetres
24. Which one of the following pollutants pollute water only?
    1. Untreated sewage
    2. Farm chemicals
    3. Factory waste
    4. Industrial waste gases
25. The following set-up can be used to investigate drainage in soil samples 
    
    Which of the following does not have to be the same for accurate observation to be made?
    1. Duration of experiment
    2. Amount of water poured on each soil
    3. Size of collecting jars
    4. Amount of soil in each funnel
26. The main source of river pollution in  Kenya is
    1. oil spills
    2. soil particles
    3. untreated sewage
    4. industrial wastes
27. All the following are ways of conserving water except
    1. boiling
    2. using water sparingly
    3. harvesting rainwater
    4. recycling dirty water
28. Which one of the following sources of water provides us with soft water?
    1. Ocean
    2. Dams
    3. Borehole
    4. Rainwater
29. Bilharzia worms mainly affect the
    1. nose and eyes
    2. kidneys and liver
    3. legs and hands
    4. bladder and intestines
30. Makulina noticed small and shallow channels forming in the soil due to running water.
    
    The type of soil erosion noticed by Makulina is
    1. gulley
    2. sheet
    3. rill
    4. splash
31. What is observed when dry soil is added to a jar of water?
    1. Bubbles
    2. Air
    3. Coloured fumes
    4. Water droplets
32. Which one of the following would most likely happen immediately all snakes are killed in the food chain below?
    Grass → Grasshopper → frogs →snakes → secretary birds
    1. Frogs would reduce in number
    2. The amount of grass would increase
    3. Secretary birds would reduce in number
    4. The grasshoppers would increase in number
33. Which one of the following groups of food preservation methods consists of only traditional methods?
    1. Smoking, drying, salting
    2. Freezing, pasteurization, canning
    3. Low temperature, salting, canning
    4. Salting, refrigeration, smoking
34. Which one of the following is not likely to produce light ?
    
35. A child suffering from rickets should be given a diet rich in
    1. proteins
    2. fats
    3. vitamin D and calcium
    4. carbohydrates
36. A card with the word SOUND written on it was placed in front of a mirror. Which one of the following shows how the word would appear in the mirror?
    
37. Presence of cumulus clouds is a sure sign of
    1. fine weather
    2. drought
    3. rain
    4. storm
38. Pressure in liquids increase with
    1. mass
    2. temperature
    3. depth
    4. surface area
39. The following are methods of controlling human intestinal worms except
    1. proper cooking of food
    2. proper washing of foods that are eaten raw
    3. proper sanitation
    4. balanced diet
40. Which one of the following will float on water?
    1. Piece of wood
    2. Small stone
    3. Iron ball
    4. Piece of wire
41. Which one of the following is a natural way of lighting a house?
    1. Using translucent roof
    2. Using gas lamps
    3. Using oil and electric lamps
    4. Using candles
42. Fats and oils are necessary in a diet for
    1. building strong teeth
    2. protection against disease
    3. replacing dead cells
    4. keeping the body warm
43. Three of the following are natural sources of light except
    1. stars
    2. moon
    3. sun
    4. glow worms
44. Objects thrown to the air come back to the earth due to the force of
    1. gravity
    2. inertia
    3. pressure
    4. friction
45. Which of the following is a herbivore?
    1. Dog
    2. Man
    3. Lion
    4. Goat
46. Mutheu tied a transparent plastic bag around a leaf of a plant as shown below.
    
    What was her observation after five hours on a sunny day?
    1. All the air in the plastic bag was used up
    2. The leaf turned black
    3. Water droplets formed inside the plastic bag.
    4. The tied leaf turned yellow
47. The tendril used for climbing is a modified
    1. root
    2. stem
    3. flower
    4. leaf
48. Study the diagram below.
    
    The experiment above shows that
    1. air experts pressure
    2. air has weight
    3. air lacks mass
    4. air occupies space
49. The pie chart below shows composition of air
    
    Which of the labelled sectors shows the gas used by legumes to make proteins?
    1. R
    2. P
    3. Q
    4. .O
50. The following are uses of water for recreation. Which one is not used?
    1. Surfing
    2. Sport fishing
    3. Marking a fountain
    4. Swimiming

MARKING SCHEME 

1. A
2. D
3. C
4. A
5. D
6. D
7. C
8. A
9. A
10. B
11. D
12. D
13. B
14. C
15. D
16. D
17. C
18. C
19. B
20. D
21. B
22. B
23. A
24. A
25. C
26. B
27. A
28. D
29. D
30. C
31. A
32. C
33. A
34. A
35. C
36. A
37. A
38. C
39. D
40. A
41. A
42. D
43. B
44. A
45. D
46. C
47. D
48. B
49. D
50. C