INTEGRATED SCIENCE PAPER 2

Document Details

Description

This summary covers the Kenya Junior School Education Assessment (2025) document, which contains three scientific tasks.

Question One: Mixture Separation

The experiment involves preparing and separating a homogeneous mixture using sodium chloride and a solvent.
The assessment requires identifying the solvent, describing observations during the mixing stage, and explaining the purpose of stirring.
Students must identify the substance recovered in the final stage, name the separation methods used, and provide a laboratory safety precaution.
Question Two: Plant Biology and Photosynthesis

This section focuses on leaf anatomy and a photosynthesis experiment.
Leaf Parts: Students are asked to identify and label the midrib, vein, and lamina on a diagram. They must also state three observable adaptations of the leaf.
Photosynthesis Experiment: A learner investigated how light intensity (controlled by lamp distance) affects the rate of photosynthesis by counting bubbles produced by pondweed.
Data Analysis: The task requires identifying a specific apparatus, calculating a missing mean value (L) in the results table, determining the lamp distance corresponding to 31 bubbles, and drawing a conclusion about the relationship between light intensity and the rate of photosynthesis.
Question Three: Physics Measurements

The final section evaluates measurement skills and calculations related to a wooden block.
Measurements: Students must use a ruler to measure the length, width, and height of a drawn block.
Mass and Weight: The mass of the block is determined using a beam balance diagram, then converted from grams to kilograms. The weight is calculated using the formula $W = \text{mass} \times \text{gravity}$ (where gravity = 10 N/kg).
Pressure: The final task is to calculate the maximum pressure the block exerts on a surface using the formula $P = \text{Force/Area}$.

About This Resource

This Grade 9 KJSEA Past Papers is fully aligned with the Kenyan CBC curriculum standards and KICD requirements. Professionally prepared for students and teachers, this material supports effective learning and is ready for immediate classroom use.