KJSEA Grade 9 Integrated Science Trial Questions with Answers

KJSEA Grade 9 Integrated Science Trial Questions with Answers

Instructions: Answer all questions in the spaces provided. Section A consists of 30 multiple choice questions. Section B consists of 7 structured questions. Total marks: 100.

KJSEA Grade 9 Integrated Science Trial Questions with Answers Section A: (30 Marks)

Answer ALL questions in this section. Each question carries 1 mark.

1. During a lesson, learners were taught hazard symbols. Draw a symbol that represents corrosive substances.

2. Grade 9 learners from Moi Centre reported scientific information on a table, as shown below, after experimenting on simple circuits.

Which basic scientific skill did they apply to report the information as shown above?

A. Classification
B. Communication
C. Observation
D. Conclusion

Answer: B

3. Natasha, a grade 9 learner listed the following as careers related to Integrated Science. Which one was not correct?

A. Radiology
B. Forensics
C. Catering
D. Teaching

Answer: C

4. The following are common hazards in the laboratory. Which common hazard is not correctly matched with its cause?

A. Poisoning – inhaling corrosive chemicals.
B. Scalds – hot liquids or steam.
C. Burns – open flames.
D. Suffocation – inhaling poisonous gases.

Answer: A (Poisoning is caused by ingesting or absorbing toxic substances, not specifically inhaling corrosive chemicals)

5. Which one of the following items found in the first aid kit is used to cover wounds and keep off germs?

A. Cotton wool
B. Bandages
C. Antiseptics
D. Gloves

Answer: B

6. The diagram below shows a certain laboratory apparatus used by grade 9 learners during a practical lesson.

(Image reference: separating funnel)

Identify the function of the apparatus above.

A. To pour liquids into containers with narrow necks.
B. To separate immiscible liquids.
C. To add controlled amounts of liquids into reaction vessels.
D. To put liquids into reaction vessels with long necks.

Answer: B

7. Mr. Mutiso accidentally mixed sodium chloride and iodine crystals. Which method of separating mixtures would you advise him to use in order to obtain the original substances?

A. Crystallisation
B. Sublimation
C. Simple distillation
D. Evaporation

Answer: B (Iodine sublimes, sodium chloride does not)

8. Grade 9 learners visited the Changamwe oil refinery during their Educational trip in Mombasa to learn more about the applications of methods of separating mixtures. Which method was applied in the refinery to obtain petrol from crude oil?

A. Fractional distillation
B. Evaporation
C. Solvent extraction
D. Sublimation

Answer: A

9. Which one of the following is not a physical property of magnets?

A. Magnets attract magnetic materials.
B. The bar magnet rests in North-South direction when suspended.
C. The strength of magnets is greatest at the poles.
D. The unlike poles of magnets repel.

Answer: D (Unlike poles attract, like poles repel)

10. The form of energy that comprises both potential and kinetic forms of energy is called

A. chemical energy
B. electrical energy
C. mechanical energy
D. nuclear energy

Answer: C

11. Sources of energy are classified as renewable or non-renewable sources. Which one of the following sources of energy is not renewable?

A. Natural gas
B. Charcoal
C. Biogas
D. Wind

Answer: A (Natural gas is non-renewable; charcoal is from trees which can be replanted, though often considered non-renewable if not sustainably managed)

12. The following are steps followed when using a plant extract acid-base indicator to test whether the household solutions provided were acidic or basic but not in the correct order;

i. use a dropper to add 5 drops of the plant extract in each of the solutions.
ii. observe the colour changes.
iii. put 2ml of the household solutions in separate test tubes and label them.
iv. arrange the test tubes in the test tube rack.

Which one of the following shows the correct steps to be followed?

A. iii, iv, i, ii
B. iii, i, iv, ii
C. iv, i, iii, ii
D. iv, iii, ii, i

Answer: A

The diagram below shows a set up of an experiment used by grade 9 learners to investigate some changes that matter undergoes. Use it to answer questions 13 and 14.

15. A compound is a pure substance made of two or more elements that are chemically combined. Which one of the following is not a compound?

A. Sodium chloride
B. Carbon (IV) oxide
C. Crude oil
D. Water

Answer: C (Crude oil is a mixture of hydrocarbons)

16. Fire can start due to natural causes or human actions. Which one of the following is a natural cause of fire?

A. Cooking accidents
B. Electrical faults
C. Lightning
D. Arson

Answer: C

17. Different classes of fire have different ways of putting them out. Which one of the following cannot be used to put out class K fire?

A. Use of water fire extinguisher.
B. Use of carbon (IV) oxide fire extinguisher.
C. Covering it with a blanket if the fire is small.
D. Use of wet chemical fire extinguisher.

Answer: A (Class K fires involve cooking oils and fats; water can spread the fire)

20. Sarah, a grade 9 learner came across an atom of a certain element whose atomic number is 12. Which one of the following is a use of this element?

A. It is used to make utensils.
B. It is used as a medal for second position in a competition.
C. It is used to make fireworks and missiles.
D. It is used to make jewellery.

Answer: C (Atomic number 12 is Magnesium, used in fireworks and flares)

21. Which one of the following excretory wastes is excreted by all the excretory organs?

A. Excess salts
B. Carbon (IV) oxide
C. Urea
D. Excess water

Answer: D (All excretory organs remove excess water)

The diagram below shows the male reproductive system. Study it and use it to answer questions 22 and 23.

(Image reference: male reproductive system with parts labeled)

23. Which part produces seminal fluids in which sperms swim?

A. Testis
B. Glands
C. Sperm duct
D. Urethra

Answer: B (Seminal vesicles and prostate gland produce seminal fluid)

24. Osmosis is the movement of water molecules from the region of high concentration to the region of low concentration through a semipermeable membrane. The following are all importance of osmosis in plants except

A. uptake of water by root hair.
B. support in herbaceous plants.
C. opening and closing of stomata.
D. pollination in plants.

Answer: D (Pollination involves transfer of pollen, not osmosis)

27. The description of type of teeth, their arrangement and specialization in animals is called dentition. Which one of the following animals does not have heterodont dentition?

A. Goat
B. Rat
C. Dolphin
D. Monkey

Answer: C (Dolphins have homodont dentition – all teeth similar)

28. Different types of teeth have different structures and functions. Which one of the following description is for molars?

A. They have one root.
B. They have cusps.
C. They are sharp and pointed.
D. They are chisel shaped.

Answer: B (Molars have cusps for grinding)

29. Digestion is the process through which complex food substances are broken down into simpler substances that can be absorbed into the body. Which one of the following digestive juices contain salts that are used for emulsification of fats?

A. Gastric juice
B. Bile juice
C. Saliva
D. Pancreatic juice

Answer: B

30. Interdependence is how living organisms interact with one another and their environment to survive. Which type of interrelationship between the biotic components of environment do one organism benefit and harm the other organism?

A. Parasitism
B. Saprophytism
C. Symbiosis
D. Predation

Answer: A (Parasitism: one benefits, the other is harmed)

KJSEA Grade 9 Integrated Science Trial Questions with Answers Section B: (70 Marks)

Answer ALL questions in the spaces provided.

31. Grade 9 learners from Mwijabu Junior school weighed the mass of the wooden block and found it to be 40g. They also measured the length, width and the height of the block using a ruler and found them to be 8cm by 5cm by 2cm respectively.

a) Identify the laboratory apparatus whose functions are stated below: (3 marks)

i) Used to measure weight.

Answer: Spring balance / Electronic balance / Weighing scale

ii) Used to store or dispense water into reaction vessels with long necks.

Answer: Wash bottle

iii) Support crucible when heating.

Answer: Pipe clay triangle

b) Calculate the density of the wooden block in kg/m³. (3 marks)

Answer:

• Volume = length × width × height

• Volume = 8cm × 5cm × 2cm = 80 cm³

• Mass = 40g = 0.04 kg

• Volume in m³ = 80 × 10⁻⁶ = 8.0 × 10⁻⁵ m³

• Density = mass/volume = 0.04 kg ÷ 8.0 × 10⁻⁵ m³ = 500 kg/m³

(Award 1 mark for correct volume, 1 mark for correct conversion, 1 mark for correct density)

c) Name the apparatus used to protect learners from harmful gases in the laboratory. (1 mark)

Answer: Fume chamber / Fume cupboard

32. Study the list of organisms found in Nairobi National Park. (Acacia trees, giraffe, and lion)

a) Use the list of organisms above to make a simple food chain. (1 mark)

Answer: Acacia trees → Giraffe → Lion

(Award 1 mark for correct sequence with arrows)

b) From the food chain in (a) above, what will be the effect on acacia trees if all the lions in this ecosystem die? (1 mark)

Answer: Acacia trees will decrease or be overgrazed because the giraffe population will increase (since lions no longer prey on them).

(Award 1 mark for correct explanation)

c) Name the trophic level occupied by the giraffe in the food chain. (1 mark)

Answer: Primary consumer / Herbivore / Second trophic level

(Award 1 mark for any correct answer)

34. The diagram below shows the human digestive system. Study it and use it to answer questions that follow.

a) In which part of the body does absorption of digested food take place? (1 mark)

Answer: Small intestine / Ileum

(Award 1 mark for correct answer)

d) Complete the table below by filling in the blank spaces. (3 marks)

(Award 1 mark for each correctly completed row)

35. Which method of softening hard water is used to remove temporary hardness only? (1 mark)

Answer: Boiling

(Award 1 mark for correct answer)

b) Identify the methods of separating mixtures that are used to separate the following mixtures: (2 marks)

i) Dry ice and sodium chloride:

Answer: Sublimation

ii) Saturated solution of copper (II) sulphate:

Answer: Crystallisation / Evaporation

(Award 1 mark for each correct method)

37. Mr. Mwangi, a grade 9 Integrated Science facilitator displayed the cross section of a water dam shown below on a white board.

(Image reference: cross section of dam showing thick base)

a) Explain why water dams are constructed with thickest walls at the base. (1 mark)

Answer: Pressure in liquids increases with depth; therefore the base experiences the highest pressure and needs to be strongest/thickest to withstand it.

(Award 1 mark for correct explanation)

b) State any two applications of pressure in liquids. (2 marks)

Answer:

• Hydraulic brakes in vehicles

• Hydraulic lifts/presses

• Water supply systems

• Dams construction

• Syringes

• Drinking straws

(Award 1 mark for each correct application, maximum 2 marks)

Get Access to More KJSEA Trial Questions and KJSEA Prediction Papers with Marking Schemes 2026

KJSEA Integrated Science Exam Guide with Authentic KJSEA Trial Questions

This comprehensive collection of trial examination questions has been carefully designed to mirror the actual KJSEA Integrated Science Paper 1 format, helping students build confidence and master exam techniques before the exam day. KJSEA integrated science trial questions cover all key areas, including scientific skills, laboratory safety, separation techniques, energy, magnetism, matter, chemical changes, rusting, atomic structure, excretion, reproduction, osmosis, digestion, interdependence, and food chains.

Why Use These KJSEA Grade 9 Integrated Science Trial Questions with Marking Schemes?

1. Authentic KJSEA Exam Experience
These KJSEA trial questions follow the exact structure and style of the official KJSEA Integrated Science Paper 1 examination, complete with multiple-choice questions and structured section B questions with diagrams and tables. Students get a realistic feel of what to expect on exam day.

2. Comprehensive Coverage
With 37 questions covering all key KJSEA integrated science revision areas: scientific skills, laboratory safety and first aid, separation techniques, magnetism and energy, matter and chemical changes, rusting and fire, atomic structure and elements, excretion and reproduction, osmosis and plant cells, digestion and interdependence, and food chains and ecosystems, this KJSEA resource ensures thorough preparation across the entire Grade 9 Integrated Science Paper 1 syllabus.

3. Marking Scheme Included
Understanding how marks are allocated is crucial for KJSEA exam success. Each KJSEA trial question comes with the correct answer, and section B questions include detailed marking guidance, allowing students, teachers, and parents to assess performance accurately and identify areas needing improvement.

4. Time Management Practice
Working through these 37 questions under timed conditions helps students develop the speed and efficiency needed to complete the actual exam within the allocated time of 1 hour and 40 minutes.

5. Ideal for Teachers and Tutors
This KJSEA trial papers revision resource serves as an excellent teaching aid for classroom revision, homework assignments, and mock examinations. Teachers can use the marking scheme to provide consistent feedback.

KJSEA Grade 9 Integrated Science Trial Questions with Answers Frequently Asked Questions (FAQ)

1. What is KJSEA?

KJSEA stands for Kenya Junior School Education Assessment. It is the national examination administered to Grade 9 students under the Competency-Based Curriculum (CBC) in Kenya, marking the end of Junior Secondary education.

2. How is KJSEA Integrated Science Paper 1 structured?

Grade 9 Integrated Science Paper 1 Exam consists of two sections:

• Section A: 30 multiple-choice questions (30 marks)

• Section B: Structured questions requiring explanations, calculations, diagrams, and data interpretation (70 marks)
  Total time: 1 hour 40 minutes | Total marks: 100

3. What topics are covered in KPSEA Integrated Science Paper 1?

Key KPSEA Integrated Science Paper 1 revision topics include:

• Scientific skills and laboratory safety

• First aid and hazards

• Separation techniques

• Magnetism and energy

• Matter and chemical changes

• Rusting and fire safety

• Atomic structure and elements

• Excretion and reproduction

• Osmosis and plant cells

• Digestion and dentition

• Interdependence and ecosystems

• Food chains and energy transformation

4. Are these trial questions similar to the actual KJSEA exam?

Yes, these KJSEA trial questions follow the KJSEA examination format, question styles, and difficulty level. They have been designed based on the Grade 9 Integrated Science syllabus and KJSEA past examination patterns, including diagrams and tables similar to those in the actual exam.

5. How should I use these KJSEA trial questions for effective revision?

• Attempt Section A under timed conditions (about 30-40 minutes)

• For Section B, practice writing clear, concise explanations and showing calculations step by step

• Review incorrect answers using the marking scheme

• Focus on weak areas identified through self-assessment

• Practice interpreting diagrams and completing tables

• Attempt the full paper in one sitting to build exam stamina

6. Does this include Paper 2 (Practical)?

No, this document covers Paper 1 (theory) only. Integrated Science Paper 2 is a practical examination that assesses hands-on laboratory skills and is conducted separately.

7. How can teachers use this KJSEA revision resource?

Teachers can use these questions for:

• Classroom revision exercises

• KJSEA Mock examinations

• Homework assignments

• Identifying student strengths and weaknesses

• Group discussion activities

• Teaching exam technique and time management

• Practical theory preparation

8. Is the marking scheme accurate?

Yes, all answers have been verified against the KJSEA Grade 9 Integrated Science syllabus and standard examination marking guidelines. Section B answers include key points that examiners look for.

9. How can I track my progress?

Keep a record of your scores after each attempt. Aim for at least 70% (70/100) before sitting for the actual examination. Focus on understanding concepts rather than memorizing answers, especially for Section B questions that require explanations.

10. What are the career pathways for Integrated Science?

Integrated Science lays the foundation for careers in:

• Medicine and healthcare (doctor, nurse, pharmacist)

• Engineering (all branches)

• Laboratory technology and research

• Environmental science and conservation

• Agriculture and food science

• Teaching and education

• Forensic science

• Pharmacy and pharmaceutical industries

11. How important are diagrams in the exam?

Diagrams are very important in Integrated Science. Many questions include diagrams that require interpretation, labeling, or explanation. Practice identifying parts of diagrams and understanding what they represent.

12. What common mistakes should I avoid in Integrated Science KJSEA Paper 1 Exam?

• Misreading questions – read carefully before answering

• Forgetting units in calculations

• Not showing working in calculation questions

• Confusing similar concepts (e.g., osmosis vs diffusion)

• Rushing through Section A – each question carries equal marks

• Not attempting all questions in Section B

13. Where can I download KJSEA Trial Questions and KJSEA Prediction Papers?

Get access to KJSEA trial questions with answers and KJSEA prediction questions with marking schemes on ReviseKenya.com. The platform, ReviseKenya.com, also has KJSEA past papers, KJSEA revision questions, and KJSEA topical tests.

These are KJSEA trial examination questions designed for KJSEA revision purposes based on the official KJSEA examination structure.

Get Access to More KJSEA Trial Questions and KJSEA Prediction Papers with Marking Schemes 2026 on ReviseKenya

Success in KJSEA Integrated Science comes from understanding scientific concepts, practicing regularly, and applying knowledge to real-world situations. Use these questions to build confidence and identify areas for improvement. Remember that science is about understanding principles, not just memorizing facts. Keep practicing, stay curious, and always ask “why” things happen the way they do.