KJSEA Integrated Science: What Is Actually Assessed

Integrated Science is three sciences travelling as one subject, and candidates who revise it as a single mountain drown in it. The paper samples its strands deliberately, its question styles repeat, and its practical skills appear in written form that can be drilled at a desk. Split it correctly and it becomes three short hills.

KJSEA written papers run from 26 to 30 October 2026, with a rehearsal day on Friday 23 October and the first session at 8.30am. That leaves a few weeks of evenings, which is enough if the time goes to the right places. This guide shows how the subject splits, what each strand tends to ask, how the practical skills turn up on paper, and how to organise the remaining revision.

How the subject splits

What each strand asks for

Living things and the environment

Diagrams carry this strand. A candidate who can draw and label a plant cell, an animal cell, the digestive system and a simple food chain from memory has a strong base. The second half of the typical question, "explain a function", is where marks are lost: "the heart pumps blood" is a start, but "the heart pumps blood around the body so that oxygen reaches the cells" is the answer that earns the mark. Teach the habit of finishing the sentence with a "so that".

Matter and its changes

This strand rewards linking a method to a reason. Knowing the names (filtration, evaporation, decanting, sieving) is the recall part; saying why a method suits a particular mixture is the mark that separates candidates. Household cases are common, so practise on real ones: salt in water, sand in rice, oil on water, tea leaves in tea.

Force, energy and their uses

Calculations here are usually short, and the formula is often given. Marks are lost on units and on skipping the working. Train the three-line habit: write the formula, substitute the numbers, give the answer with its unit. For energy questions, the safest format is a chain of arrows, for example chemical energy in the cell, to electrical energy in the wire, to light and heat in the bulb.

The practical dimension on a written paper

The written paper also carries the practical dimension: candidates read thermometers and measuring cylinders drawn on the page, identify apparatus, order the steps of a separation, and state observations versus conclusions. These are marks earned entirely through drill, because the skill is the reading and phrasing, not the equipment. The distinction the schemes reward hardest: an observation is what the senses record; a conclusion is what it means. Candidates who write "the water is boiling because..." inside an observation lose the mark to the conjunction.

• Reading scales: find the value of one small division first, then count. Read a measuring cylinder at the bottom of the curved surface, at eye level.
• Naming apparatus: learn the common items by sight from labelled drawings: beaker, conical flask, funnel, test tube, Bunsen burner, tripod stand.
• Ordering steps: say each step aloud as a sentence starting with a verb: "Pour", "Stir", "Filter", "Heat".
• Safety: one clear precaution with its reason, for example tie back long hair when heating, because it could catch fire.

Practice questions to try tonight

These are practice items written for this guide, not official KNEC items. Cover the answers, attempt all four, then mark.

1. Name the part of a plant cell that makes food, and state one condition it needs. Answer: chloroplast; it needs light (also accept carbon dioxide or water).
2. A learner mixes salt and sand in water. Name the method that removes the sand, then the method that recovers the salt. Answer: filtration, then evaporation.
3. A force of 20 N moves a box 3 m. Calculate the work done (work = force × distance). Answer: 20 × 3 = 60 J. The unit earns its own credit.
4. A candle is lit in a jar and the lid is closed. Write one observation and one conclusion. Answer: Observation: the flame goes out after a short time. Conclusion: burning needs air (oxygen), which was used up.

More worked items across all three strands are in our free KJSEA Integrated Science sample questions with answers.

The revision split that works

Rotate the three strands across the week rather than blocking one per fortnight, one session each, always ending with five marked questions from that strand. The full strand map for the junior school years is in our Integrated Science guide for Grades 7 to 9, and how this paper sits among the nine examined learning areas is explained in which subjects KJSEA examines.

In the final fortnight, cut new content and keep only the rotation and the practical drills. Our guide to the final 30 days before KJSEA explains what to keep and what to drop across all subjects.

Everything needed for the loop, notes per sub-strand, revision papers and their marking schemes, ships in the Grade 9 Integrated Science Complete Pack, or with every other subject in the Grade 9 All Subjects Bundle. The week-by-week run-in for all papers is the free KJSEA countdown plan.

Frequently asked questions

Do candidates need to remember formulas?

Learn the common ones anyway, but practise reading the formula from the question when it is given. Most calculation marks are lost on units and missing working, not on the formula.

How can my child prepare for practical questions without a laboratory?

Most practical marks on the written paper come from reading scales, naming apparatus, ordering steps and phrasing observations. All of these can be drilled from drawings at a desk.

Which strand should we revise first?

None of them first: rotate all three each week. Use marked papers to find the weakest strand and give it one extra session.

Are full practice papers available?

Yes. The KJSEA Integrated Science predictive papers give full timed papers with answers for weekend practice.

For notes, papers and marking schemes in one download, start with the Grade 9 Integrated Science Complete Pack.