JSS Assessments and Exams
2026 Grade 9 Integrated Science KJSEA TRIAL 1 202 Set 2 Marking Scheme
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JSS Assessments and Exams
Level:
Junior Secondary
Grade:
Grade 9
Term:
Term 1
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ENOVATE ASSESSMENT SERIES GRADE 9 2026
INTEGRATED SCIENCE SET 2 MARKIN
SCHEME
9
202
SECTION A: MULTIPLE CHOICE QUESTIONS (30 MARKS)
Award exactly 1 mark for each correct response. No half marks are applicable.
Qtn
Correct Option
Key Concept & Syllabus Rationale
1
A. Calcium ions
Water hardness is caused by dissolved Ca²⁺ and Mg²⁺ ions reacting with soap to form scum.
2
A. Calcium carbonate
Boiling decomposes soluble Ca(HCO₃)₂ to form insoluble CaCO₃
| Qtn | Correct Option | Key Concept & Syllabus Rationale |
|---|---|---|
| 1 | A. Calcium ions | Water hardness is caused by dissolved Ca²⁺ and Mg²⁺ ions reacting with soap to form scum. |
| 2 | A. Calcium carbonate | Boiling decomposes soluble Ca(HCO₃)₂ to form insoluble CaCO₃precipitate (scale/fur). |
| 3 | B. 2.8.5 | Phosphorus (atomic number 15) distributes as 2 in the K-shell, 8 in the L-shell, and 5 ... |
| 4 | B. Neutrons | Isotopes have identical atomic numbers (protons) but differ in mass numbers due to neut... |
Curriculum
CBC / CBE Kenya
Grade / Class
Grade 9
Term
Term 1
File Format
DOCX (Editable)
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Kenyan CBC Curriculum Aligned (KICD Compliant)
This document is professionally prepared and verified for Grade 9 (Junior Secondary) • Term 1.
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