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Pearson Edexcel A-Level Biology International — Core Practical 5

In this video, we cover Pearson Edexcel International A-Level Biology Core Practical 5, focusing on microscopy, biological drawings, measurement, and scale.

Core Practical 5 objectives
(i)Use a light microscope to make observations and produce accurate, labelled drawings of suitable animal cells.

(ii)Use a graticule with a microscope to make measurements and understand the concept of scale.

In this practical, you will learn how to:

-Prepare and observe animal cells using a light microscope
-Focus and use the microscope correctly
-Produce clear, accurate and appropriately labelled biological drawings
-Use a stage micrometer and eyepiece graticule
-Calibrate a graticule at different magnifications
-Measure structures within cells
-Calculate actual size from microscope measurements
-Understand and apply magnification, image size and actual size
-Convert between units such as mm, µm and nm
Avoid common errors when taking microscopic measurements

This video is designed to support students studying Pearson Edexcel International A-Level Biology and preparing for practical questions and examinations.

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