Biological Drawing Scale Bar And Magnification Youtube Introduction to biological drawing 3 guidance for biological drawing4 drawing from a microscope slide8 teacher resource 1 – common errors activity 15 student resource 1 – drawings, graphs and tables checklists 16 version 2.1 amended section on scale bar, page 4. the word ‘if necessary’ has been removed. A level biology, as level. topic cells & microscopes. what a scale bar is and how to use it.
Biology Workshop Measurements To Familiarise Yourself With Measurements Calculating scale magnification of a drawing scale, or magnification, is simply how much bigger or smaller the drawing is compared with the actual specimen. calculate as follows: 1. measure between two appropriate points of the drawing (e.g. total length or width). 2. measure between the same two points of the specimen. 3. We use this formula to work out the magnification of a drawing. in this formula, size could be length or breadth, but the same measurement must be taken of both the specimen and the drawing. always include a magnification or scale bar on your drawing. unit 4: magnifying instruments and biological drawings. Using a scale bar measure the length of the specimen in mm. (show working) 83mm measure the length of the scale bar in 32mm mm. calculate how many scale bar lengths make the specimen. (divide length of specimen by length of scale bar) 83mm 132mm = 2.6 (no units) calculate the size. multiply the scale bar label by the last answer. To calculate the linear magnification of a drawing or image, the following equation should be used: m agnification = i mage size (with ruler) ÷ a ctual size (according to scale bar) in order to calculate magnification, both image size and actual size must be in the same units. metric conversions can be applied according to the following table:.
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