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PSLE 🏝 ZEC ✓ MS available

Science · Paper 1 · 2021

42 questions

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Questions (42)

Section A

1. 1 mark

One of the following is the chamber of the human heart

A. Right auricle
B. Septum
C. Aorta
D. Vena cava
2. 10 marks

Match the item in LIST A with a correct response from LIST B. Write its letter in the table below.

  1. Sense of vision (1 mk)
  2. Energy transfer in solid materials (1 mk)
  3. Voluntary counseling (1 mk)
  4. Fruits and vegetables (1 mk)
  5. White blood cells (1 mk)
  6. Easily forms lather with soap (1 mk)
  7. Anther (1 mk)
  8. Gully erosion (1 mk)
  9. Endolymph (1 mk)
  10. Ureter (1 mk)

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3. 10 marks

Write TRUE if the sentence is right and FALSE if the sentence is wrong in the given spaces. i. The pancreatic juice has enzymes that digest protein food into amino acid and carbohydrates into glucose. ii. Ileum is short and much coiled small intestine. iii. The sun is an artificial source of light. iv. Virtual image cannot be formed on a screen. v. Herpes simplex virus causes genital herpes. vi. Two terminals of a cell are positive and negative. vii. Magnetic materials cannot be attracted by magnet. viii. Presence of air spaces in a body helps it to float in water. ix. Endocarp is a part of fruit which cover the seed. x. Peas and ground nuts are fleshy fruits.

  1. The pancreatic juice has enzymes that digest protein food into amino acid and carbohydrates into glucose. (1 mk)
  2. Ileum is short and much coiled small intestine. (1 mk)
  3. The sun is an artificial source of light. (1 mk)
  4. Virtual image cannot be formed on a screen. (1 mk)
  5. Herpes simplex virus causes genital herpes. (1 mk)
  6. Two terminals of a cell are positive and negative. (1 mk)
  7. Magnetic materials cannot be attracted by magnet. (1 mk)
  8. Presence of air spaces in a body helps it to float in water. (1 mk)
  9. Endocarp is a part of fruit which cover the seed. (1 mk)
  10. Peas and ground nuts are fleshy fruits. (1 mk)

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Section B

4. 10 marks

Choose the correct answers from the box below and fill in the blanks. a) Temperature is the degree of ______________ or ______________ of the body. b) The inability of a person to bear _____________ is called _______________ c) The common herbivorous aquatic animals are ______________________ and _________________________ d) Water vapour in the atmosphere is the results of ___________________ and _____________________________ e) Material that allows electricity to pass through is called _______________ while material that control the size of current flowing in a circuit is known as ___________________________ Box: Temperature is the degree of hotness or coldness of the body. The inability of a person to bear children is called sterility. The common herbivorous aquatic animals are tilapia and sardines. Water vapour in the atmosphere is the results of evaporation and condensation. Material that allows electricity to pass through is called conductor while material that control the size of current flowing in a circuit is known as resistor.

  1. Temperature is the degree of ______________ or ______________ of the body. (2 mk)
  2. The inability of a person to bear _____________ is called _______________. (2 mk)
  3. The common herbivorous aquatic animals are ______________________ and _________________________ (2 mk)
  4. Water vapour in the atmosphere is the results of ___________________ and _____________________________ (2 mk)
  5. Material that allows electricity to pass through is called _______________ while material that control the size of current flowing in a circuit is known as _______________. (2 mk)

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5. 0 marks

a) What is air? _____________________________________________________________ _____________________________________________________________ b) Mention two (2) uses of air. _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ c) List four (4) causes of air pollution. _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________

  1. What is air? (0 mk)
  2. Mention two (2) uses of air. (0 mk)
  3. List four (4) causes of air pollution. (0 mk)

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6. 0 marks

a) Define soil. _____________________________________________________________ _____________________________________________________________ b) Write three (3) activities that lead to soil degradation. _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ c) Mention three (3) agents of soil erosion. _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________

  1. Define soil. (0 mk)
  2. Write three (3) activities that lead to soil degradation. (0 mk)
  3. Mention three (3) agents of soil erosion. (0 mk)

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7. 5 marks

a) What is nervous system? ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ b) Write the function of the following parts of human ear. i. Semicircular canals ___________________________________________________________ ___________________________________________________________ ii. Cochlea ___________________________________________________________ ___________________________________________________________ iii. Hairs and mucus ___________________________________________________________ ___________________________________________________________

  1. What is nervous system? (1 mk)
  2. Write the function of the following parts of human ear. i. Semicircular canals (0 mk)
  3. Write the function of the following parts of human ear. (4 mk)
  4. Semicircular canals (1 mk)
  5. ii. Cochlea (0 mk)
  6. iii. Hairs and mucus (0 mk)
  7. Cochlea (2 mk)
  8. Hairs and mucus (1 mk)

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8. 6 marks

a) Briefly explain one (1) importance of machine in our daily life. ______________________________________________________________ ______________________________________________________________ b) Write four (4) examples of simple machine. ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ c) Mention simple machine that magnify speed. ______________________________________________________________ ______________________________________________________________

  1. Briefly explain one (1) importance of machine in our daily life. (2 mk)
  2. Write four (4) examples of simple machine. (2 mk)
  3. Mention simple machine that magnify speed. (2 mk)

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9. 5 marks

a) Write the long form of the following abbreviations on body health. i. STI ii. STDs b) List two (2) examples of pathogens. c) Mention four (4) precautions to be taken when dealing (care) with people living with HIV/AIDS.

  1. Write the long form of the abbreviation STI. (1 mk)
  2. Write the long form of the following abbreviations on body health. (2 mk)
  3. STI (1 mk)
  4. Write the long form of the abbreviation STDs. (1 mk)
  5. STDs (1 mk)
  6. List two (2) examples of pathogens. (1 mk)
  7. List two (2) examples of pathogens. (1 mk)
  8. Mention four (4) precautions to be taken when dealing (care) with people living with HIV/AIDS. (4 mk)
  9. Mention four (4) precautions to be taken when dealing (care) with people living with HIV/AIDS. (4 mk)

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12. 6 marks

a) i. Explain the term omnivorous animals. ii. Give one (1) example b) Explain four (4) threats to aquatic animals.

  1. Explain the term omnivorous animals. (2 mk)
  2. Give one (1) example (1 mk)
  3. Explain four (4) threats to aquatic animals. (3 mk)

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13. 8 marks

a) Define the term electric circuit. b) Mention four (4) components of a simple electric circuit. c) Given two resistors, R 1 and R 2 . Write the formula for total resistance, if i. Resistors connected in series. ii. Resistors connected in parallel. d) Mention two (2) causes of electric hazards.

  1. Define the term electric circuit. (1 mk)
  2. Mention four (4) components of a simple electric circuit. (2 mk)
  3. Resistors connected in series. (1 mk)
  4. Resistors connected in parallel. (2 mk)
  5. Mention two (2) causes of electric hazards. (2 mk)

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Section C

10. 10 marks

a) With example differentiate between solute and solvent. b) Complete the following word equations by writing the name of solution formed. i. Water + soap ii. Water + sugar c) Explain briefly why a stone sink in water while a piece of wood float in water.

  1. With example differentiate between solute and solvent. (4 mk)
  2. With example differentiate between solute and solvent. (4 mk)
  3. Complete the following word equations by writing the name of solution formed. (2 mk)
  4. Complete the word equation: Water + soap (1 mk)
  5. Water + soap (1 mk)
  6. Complete the word equation: Water + sugar (1 mk)
  7. Water + sugar (1 mk)
  8. Explain briefly why a stone sinks in water while a piece of wood floats in water. (4 mk)

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11. 10 marks

a) Draw the diagram to show the structure of the human brain and label fore brain, spinal cord and the skull. b) Explain briefly the structure of human tongue.

  1. Draw the diagram to show the structure of the human brain and label fore brain, spinal cord and the skull. (6 mk)
  2. Explain briefly the structure of human tongue. (4 mk)

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