A clear, age-appropriate KS3 practical worksheet for observing onion cells using a light microscope. Designed for Year 7 students, including those with a low reading age, while maintaining high scientific expectations.
This worksheet guides pupils step-by-step through preparing an onion cell slide, staining with iodine, and using a microscope safely and effectively. The method is deliberately simplified, using clear command language and consistent terminology (e.g. focus wheel), making it suitable for classrooms with mixed microscope equipment.
Microscope safety is explicitly embedded, including:
starting with the lowest magnification
focusing away from the slide when looking through the eyepiece
The resource includes:
a clear apparatus list
a concise, numbered method
a scientific drawing space for results
a written description task using key biological vocabulary (cell, cell wall, nucleus, layer, pattern)
Ideal for KS3 Biology, introductory microscope lessons, or as part of a cells topic. Suitable for independent work, paired practicals, or teacher-led demonstrations.
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£1.00