CIE 2.2 Size of Specimens

This lesson moves on to revisit the learning from the previous lesson on using a microscope to view onion and cheek cells. Students are introduced to a series of items that have been magnified and they are asked to identify each one. Students are then showed an animation from CellsAlive to rank magnified specimens in order of size. The lesson concludes with an introduction to the magnification formula, micrometers and unit conversions, together with some magnification calculations using unit conversion. Also included is a CIE specific assessment with the mark scheme.