Science Questions and Answers - Class 8 Term 2 Opener Exams 2022 Set 1

Questions

1. When the arrow head of a windvane points to the south, it shows that the wind is blowing from
   1. North
   2. South
   3. East
   4. West
2. The following are symptoms of waterbome diseases.
   1. Pain in the joints
   2. Itching in the lower abdomen
   3. Blood stained stool
   4. Severe diarrhoea and vomiting
      Which pair ofthe above listed symptoms are for bilharzia?
      1. (i) and (iv)
      2. (ii) and (iv)
      3. (i) and (iii)
      4. (ii) and (iii)
3. Heat from the fun reaches plants through
   1. conduction
   2. convection
   3. radiation
   4. convection and corduction
4. The type of beak suitable for sucking nectar should be
   1. long and slender
   2. short and slightly curved
   3. short, straight and thick
   4. Flat with serrated edges
5. The illustration below shows classification of plants.
   
   Which one of the following correctly shows: examples ofeach ofthe groups as show in the illustration?
   

   X	Y	Z
   A. Maize	Fern	Cactus
   B. Beans	Algae	Toadstool
   C. Cactus	Acacia	Mushroom
   D. Banana	Cactus	Puffballs

6. When preparing compost manure, wood ash is added to the content in order to 
   1. ensure even decomposition
   2. introduce bacteria
   3. speed up decomposition process
   4. supply additional nutrients
7. Which one of the following methods of controlling parasites cin be effectively used to do away with ticks and liver flukes?
   1. Spraying
   2. Deworming
   3. Rotational grazing
   4. Dusting
8. The diagram below shows an improvised liquid thermometer. It is used to measure room temperature, In order to make the instrument more effective one should
   
   
   1. use a better scale
   2. use a wider straw
   3. use a plastic bottle
   4. use clear water
9. Which one of the following shows the CORRECT order of foetal development in human body?
   1. Zygote → Embryo → Foetus
   2. Embryo → Foetus → Zygote
   3. Foetus → Zygote → Embryo
   4. Zygote → Foetus→ Embryo
10. The following are functions of the placenta EXCEPT one. Which one?
    1. Provides food for the growing embryo
    2. Exchange of oxygen and carbon dioxide
    3. Facilitates transfer of food
    4. Facilitates transfer of waste produets
11. Which one of the following processes takes place immediately after the egg has been! released from the ovary?
    1. Implantation
    2. Reproduction
    3. Fertilisation
    4. Ovulation
12. Study the food chain below. (the arrow points tothe eater)
    
    Mate → Chicken → Mongoose → Jackal
    Which one of the above feeding organisms will belong ‘othe same group as the mouse?
    1. Maize
    2. Chicken
    3. Mongoose
    4. Jackal
13. Below is list of sexually transmitted infections
    1. Chrancroid
    2. Syphillis
    3. Genital herpes
    4. HIV and AIDS
       Which ones among the list are caused by a virus?
       1. (i) and (ii)
       2. (iii) and (v)
       3. (iv) and (v)
       4. (ii) and (v)
14. Which one of the followings excretory produetsis excreted by the skin, lungs and Kidneys?
    1. Excess water
    2. Urea
    3. Salts
    4. Carbon dioxide
15. When setting and carrying out an experiment on soil drainage, which one of the following need NOT be the same?
    1. Amountof water
    2. Amount of soil
    3. Type ofsoil
    4. Size of funnels
16. The illustration below shows a simple homemade water filter.
    
    From the illustration letter, W as indicated will represent
    1. finesand
    2. coursesand
    3. pebbles
    4. charcoal
17. Which one of the following shows the correct order of flow of urine from the Kidneys?
    1. Bladder → ureter → urethra
    2. Urethra → ureter → bladder
    3. Ureter → urethra → bladder
    4. Ureter → bladder → urethra,
18. When hard waters mixed with soap it foms
    1. lather
    2. scum
    3. scale
    4. fur
19. Which one of the following is the function of fibre in the diet?
    1. Absorption of digested food
    2. Getting rid of undigested food
    3. Adding nutrients to the body
    4. Helps indigestion of food
20. Lactating mothers need food rich in iron in order to
    1. protect the young baby against diseases
    2. replace blood lost during perturtion 
    3. increase milk production
    4. develop strong bones in the baby
21. The illustration below was st by standard  five pupils to investigate certain property of matter.
    The property being investigated was
    1. water exerts pressure
    2. water occupies space
    3. air has mass.
    4. air occupies space
22. Which one of the following is NOT a sign of ill health on crops?
    1. Reduced yields
    2. Curled leaves
    3. Stunted growth
    4. Wilting
23. Formers keep sheep and goats MAINLY for ___ and___ respectively.
    1. meat and mutton
    2. dairy milk and mutton
    3. mutton and mutton
    4. meat and mohair
24. Which one of the following shows a pairof substances which CANNOT be separated easily?
    1. Water and cooking oil
    2. Water and salt
    3. Sugar and salt
    4. Cooking flour and salt
25. Which one of the following methods of soil conservation can be used effectively to control the type of sail erosion shown below?
    
    
    1. Mulching
    2. Contour farming
    3. Terracing
    4. Cover cropping
26. Which one of the following is NOT a method of grazing
    1. Zero grazing
    2. Herding
    3. Rotational grazing
    4. Paddocking
27. Below is a classification  of types of crops
    
    Which pair of the above will give the farmer same nutrients when planted?
    1. Cereals and oil crops
    2. Legumes and fibre crops
    3. Fruits and tubers
    4. Beverages and fibre crops
28. A boat made of iron will float on water while a pin made of iron too will sink on the same water. This is because of their difference in
    1. size
    2. shape
    3. weight
    4. material
29. The illustration below shows the reproductive organ of a plant.
    
    Which one ofthe above named parts is incorretly matched with its function?
    

    Part of the flower		Functions
    A	W	Attracts insects fro fertilisation
    B	X	receives pollen gains
    C	Y	fertilization takes place
    D	Z	Protcts the young flower at bud stage

30. Digestion of food does NOT take place is the
    1. mouth
    2. stomach
    3. small intestines
    4. large intestines
31. Which of the following does NOT have mammary glands?
    1. Whale
    2. Shark
    3. Bat
    4. Spiny anteater
32. Which one of the following bottles will produce the highest sound when hit with a metal object?
    
    
    1. Q
    2. S
    3. P
    4. R
33. Which one of the following shows the 3rd and 6th planets in the solar system respectively?
    1. Earth and Saturn
    2. Mars and Uranus
    3. Earth and Uranus
    4. Mars and Saturn
34. Dry fodder is
    1. Silage
    2. roughage
    3. hay
    4. concentrates
35. One of the following methods of food preservation preserves food by absorbing moisture. Which one?
    1. Use af honey
    2. Canning
    3. Use of low temperature
    4. Salting
36. The force of friction might be useful in the following activities except in
    1. drawing 
    2. walking 
    3. riding a bicycle 
    4. using a pulley
     
37. The illustration below shows how matter can change from one state to another.
    
    Which pair of processes as shown above require an inerease in temperature?
    1. J and K
    2. K and L
    3. L and M 
    4. M and J
38. The force that pulls things to the centre of the earth when they are dropped from a height is
    1. The force of friction
    2. The magnetic force
    3. The force of gravity
    4. Inertia
39. Below is a pie chart that shows different air components in their relative amounts
    
    Which one of the following is NOT function of the part of the air labelled Z on the pie chart?
    1. Supporting buming
    2. Good for photosynthesis
    3. Preserves soft drinks
    4. Making fire extinguishers
40. Which one of the following is NOT a cause of air pollution?
    1. Tobacco smoking
    2. Spraying farm chemicals
    3. Vehicle exhaust fumes
    4. Using excess fertilizers
41. The following are sources of elcetric current EXCEPT one, Which one?
    1. Car battery
    2. Generators
    3. Dam
    4. Solar energy panels
42. One of the following shows apair of major non-living components ofthe environment only. Which one?
    1. Light and sound
    2. Animals and plants
    3. Air and water
    4. Soil and heat
43. Blood flows from the lungs through the
    1. pulmonary vein 
    2. aorta
    3. pulmonary artery 
    4. vena cava
44. Which one ofthe fold wing shows pair of storage pests only?
    1. Weaver bird and weevil
    2. Aphids and cutworms
    3. Stalkborers and aphids
    4. Rats and termites
45. Which one of the following methods of separating mixtures is incorrectly matched with thekind of particles it separates?
    

    Method		The kifn oc mixture or particles separated
    A.	Picking	Big solid particles
    B.	Winnowing	A mixture of light and heavy solid particles
    C	Sieving	A mixture of small and large solid particles
    D	Using magnet	A mixture of magnetic particles

46. Which of the following has the position of the load between the effort and fulcrum when in use?
    1. Wheelbarrow
    2. Clawhammer
    3. Crow bar
    4. Spade
47. Which one of the following is NOT a way of reducing friction?
    1. Using lubricants
    2. Using rollers
    3. Increasing treads
    4. Streamlining,
48. The BEST way to prevent a child from getting rickets is to
    1. feed the child with foods with plenty of vitamin D
    2. feed the child with foods like fruits plenty of vitamin G
    3. feed he child with enough of a balanced diet 
    4. feed the child with foods rich in proteins
49. Which one ofthe following statements is CORRECT?
    1. Water expands when frozen
    2. Water contracts when heat
    3. Water expands when cooled
    4. Water expands more than solids and gases when heat
50. Which one of the following is the BEST method of controlling weeds in a nursery bed
    1. Digging out
    2. Using chemicals
    3. Uprooting
    4. Slashing

 Marking Scheme