Examination on Basic Science
Class: Primary 4
Term: Second Term
Time: 1 Hour
Total Marks: 70

SECTION A: OBJECTIVES (40 Marks)
Instruction: Answer all questions.

1. ________ are the sharp teeth used for tearing food. (a) Molars (b) Incisors (c) Canines (d) Premolars
2. The process where liquid water changes into water vapour is called ________. (a) Condensation (b) Evaporation (c) Precipitation (d) Filtration
3. Which of these is a quality of good drinking water? (a) Smells bad (b) Has a colour (c) Is clear (d) Tastes bitter
4. All of these are types of teeth except ________. (a) Incisors (b) Molars (c) Gums (d) Canines
5. Which part of the mouth helps to mix food with saliva and taste? (a) Lips (b) Tongue (c) Gums (d) Palate
6. The main reason for chewing food properly is to ________. (a) Make it taste better (b) Aid digestion (c) Make you talk (d) Keep teeth strong
7. Which of these is not a part of the human digestive system? (a) Stomach (b) Lungs (c) Small intestine (d) Oesophagus
8. An example of a substance that dissolves in water is ________. (a) Stone (b) Sand (c) Sugar (d) Oil
9. What is the function of the incisors? (a) Tearing food (b) Grinding food (c) Cutting food (d) Holding food
10. The change of water vapour back into liquid water is known as ________. (a) Evaporation (b) Melting (c) Condensation (d) Freezing
11. Which of the following describes impure water? (a) Is colourless (b) Has no taste (c) Contains dirt particles (d) Is odourless
12. The ________ are flat teeth used for grinding food. (a) Canines (b) Incisors (c) Molars (d) Premolars
13. Which of these statements about saliva is NOT true? (a) It moistens food (b) It helps in digestion (c) It makes food hard (d) It is produced by salivary glands
14. The correct step in the digestion process after chewing is when food passes through the ________. (a) Stomach (b) Small intestine (c) Oesophagus (d) Large intestine
15. ________ is a liquid that is colourless, odourless, and tasteless. (a) Milk (b) Water (c) Oil (d) Juice
16. All of these are roles of the lips during eating except ________. (a) Holding food in the mouth (b) Helping to speak (c) Grinding food (d) Forming words
17. Which of these liquids is NOT water? (a) Rain water (b) Tap water (c) Kerosene (d) Well water
18. When you see dew drops on grass in the morning, it is an example of ________. (a) Evaporation (b) Condensation (c) Melting (d) Boiling
19. The small intestine is where most of the ________ takes place. (a) Chewing (b) Swallowing (c) Absorption of nutrients (d) Water removal
20. An example of evaporation in everyday life is ________. (a) Rain falling (b) Clouds forming (c) Drying of clothes under the sun (d) Water boiling in a kettle

SECTION B: THEORY (30 Marks)
Instruction: Answer any THREE questions.

1. (a) Name two types of teeth and state one function for each. (2 marks)
(b) Explain the role of the tongue in feeding. (3 marks)
(c) List three major parts of the alimentary canal. (3 marks)
(d) What is the function of saliva in digestion? (2 marks)

2. (a) Define water. (2 marks)
(b) State three qualities of good drinking water. (3 marks)
(c) Differentiate between evaporation and condensation. (3 marks)
(d) Give two examples of condensation. (2 marks)

3. (a) Explain what is meant by “water as a solvent”. (2 marks)
(b) Name three substances that dissolve in water. (3 marks)
(c) List three signs or qualities of impure water. (3 marks)
(d) How can you tell the difference between pure water and milk? (2 marks)

4. (a) Name the four types of teeth found in humans. (2 marks)
(b) Describe two roles of the lips during eating. (3 marks)
(c) Briefly explain the basic role of the stomach in the digestive system. (3 marks)
(d) Give two examples of where evaporation occurs naturally. (2 marks)

Objective Marking Scheme

Question 1 – ✅ (c) Canines
Question 2 – ✅ (b) Evaporation
Question 3 – ✅ (c) Is clear
Question 4 – ✅ (c) Gums
Question 5 – ✅ (b) Tongue
Question 6 – ✅ (b) Aid digestion
Question 7 – ✅ (b) Lungs
Question 8 – ✅ (c) Sugar
Question 9 – ✅ (c) Cutting food
Question 10 – ✅ (c) Condensation
Question 11 – ✅ (c) Contains dirt particles
Question 12 – ✅ (c) Molars
Question 13 – ✅ (c) It makes food hard
Question 14 – ✅ (c) Oesophagus
Question 15 – ✅ (b) Water
Question 16 – ✅ (c) Grinding food
Question 17 – ✅ (c) Kerosene
Question 18 – ✅ (b) Condensation
Question 19 – ✅ (c) Absorption of nutrients
Question 20 – ✅ (c) Drying of clothes under the sun