STD IV SCIENCE ONLINE NECTA EXAM REVIEW FOR YEAR 2020

OFFICE OF THE PRESIDENT REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

STANDARD FOUR NATIONAL ASSESMENT

SCIENCE AND TECHNOLOGY - 2020

SECTION A

1. Answer items (i) - (v) by choosing the correct answer and writing its letter in the space provided.

(i) Which of the following foods are rich in vitamins and proteins?

  1. milk, meat and fish
  2. tomato, onions and carrots
  3. mangoes, fish and carrots
  4. fish, rice and maize
Choose Answer

(ii) Which of the following foods gives the body energy?

  1. cassava
  2. fish
  3. milk
  4. fruits
Choose Answer

(iii) Which nutrients are found in milk?

  1. Vitamins and proteins
  2. Fats and vitamins
  3. carbohydrates and fats
  4. Proteins and fats
Choose Answer

(iv) What is the function of foods rich in protein nutrients?

  1. Giving the body heat and energy
  2. Building and repairing body
  3. Giving the body energy and minerals
  4. Building and protecting the body.
Choose Answer

(v) All the following diseases are caused by eating contaminated food except?

  1. Typhoid
  2. Diarrhea
  3. Cholera
  4. Malaria.
Choose Answer

2. Answer questions (i) - (v) by matching actions that lead to environmental destruction/degradation in List A with the meanings of these actions in List B. Write the letter of the correct answer in your exercise book.

LIST A

LIST B

(i) Dumping chemicals and waste in dams and rivers.

(ii) Keeping a large number of animals in a small area.

(iii) The result of water air and soil pollution

(iv) Dumping chemicals and waste in the soil

(v) Increased levels of dust and smoke in the atmosphere
  1. Destruction of the environment
  2. Air pollution
  3. Water pollution
  4. Soil erosion
  5. Soil fertility
  6. Soil pollution
  7. Increased rainfall
View Answer

3. Answer questions (i) - (v) by choosing the correct word from the box given and writing it in the spaces provided.

reflection, refraction, absorption, dispersion, blocked, penetration
  1. What happens when light rays travel from one medium to another?
    2. View Answer

  2. What happens when light rays hit an opaque material?
    3. View Answer

  3. What happens when light rays hit a smooth shiny surface?
    4. View Answer

  4. What happens when light rays hit an object which is black in colour?
    5. View Answer

  5. What happens when light rays meet water droplets in the atmosphere?
View Answer

4. You have been given steps A - E that are involved in the digestion process of food in the digestive system. Arrange these steps by writing the sentences given in their correct order in the spaces provided in the table below:

  1. Faeces leave the body through the anus.
  2. The food is digested and absorbed in the small intestine.
  3. The food enters the mouth.
  4. The food passes through the oesophagus to reach the stomach.
  5. Water and mineral salts are absorbed in the large intestine leaving the undigested waste to enter the rectum.

Steps

Sentence
  1. Step 1


  1. Step 2


  1. Step 4


  1. Step 5


  1. Step 6


View Answer

5. Study the pictures below and then answer the questions that follow.

  1. Which two items above are used as modern ways of communication methods?
    2. View Answer

  2. Which two items above are used as traditional ways of communication methods?
    3. View Answer

  3. Which of the items above is not used in communication?
    4. View Answer

  4. In what way is the item with an antenna above useful in daily life?
    5. View Answer

  5. Which of the items above is used in communication without producing sound?
    6. View Answer

    View Answer

    View Answer

    View Answer

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