Scientific Diagrams

Learning Objective

In this lesson we will learn the rules for drawing scientific diagrams and how to draw some common pieces of laboratory equipment.

Learning Outcomes

By the end of this lesson you will be able to:

  • Draw and label scientific diagrams, according to a set of rules.

  • Draw scientific diagrams of common laboratory equipment.

 

BUY THE YEAR 7 CHEMISTRY WORKBOOK

 

Introduction

  • Scientific diagrams are designed to be simple, clear representations of scientific equipment and experiments.
    They need to convey information in a way that can be easily interpreted by others.

 
student drawing scientific diagram

(Image: OpenClipart-Vectors, Pixabay)

 

Rules for Drawing Scientific Diagrams

  • Scientific diagrams are not intended to be ‘real life’ drawings, so you don’t need to be a great artist to create them.
    You do, however, need to follow several rules when drawing them.

 

Rule #1

  • Use a sharp lead pencil.
    Don’t use a pen.
    Don’t use a coloured pencil.
    Don’t use a blunt pencil.

 

sharp pencil scientific diagram    pen scientific diagram    coloured pencil scientific diagram

(Images: Free-Photos, Pixabay; radekkulupa, Pixabay; LeoNeoBoy, Pixabay)

 

Rule #2

  • Draw objects in two dimensions.
    Don’t draw in 3D.

 

two dimensions scientific drawing                        three dimensions scientific drawing

 

Rule #3

  • Draw clean, single lines.
    Don’t draw sketchy lines.

 

two dimensions scientific drawing                        sketchy lines scientific diagram

 

Rule #4

  • Don’t close off openings of glassware.

 

two dimensions scientific drawing                        closed beaker scientific diagram

 

Rule #5

  • Use a ruler to draw straight lines.
    Don’t draw lines freehand.

 

correct scientific diagram            incorrect freehand scientific diagram

 

Rule #6

  • Don’t shade or colour in.
    They might look nicer coloured in, but scientific diagrams need to be clear and simple.

 

correct scientific diagram            shading scientific diagram

 

Rule #7

  • Don’t ‘float’ objects.
    If objects are in contact with each other, show it in the diagram.

 

correct scientific diagram            floating objects scientific diagram

 

Rule #8

  • Label objects with straight lines.
    Don’t use arrow heads.
    Avoid crossing over lines.

 

correctly labelled scientific diagram            incorrectly labelled scientific diagram

 

Drawing Laboratory Equipment

  • The following scientific diagrams show how to draw some common laboratory equipment.

 

Beaker

 
beaker scientific diagram

A scientific diagram of a beaker.

(Left image: Lilly_M, Wikimedia Commons)

 

Conical Flask

 
conical flask scientific diagram

A scientific diagram of a conical flask.

(Left image: Lucasbosch, Wikimedia Commons)

 

Measuring Cylinder

 
measuring cylinder scientific diagram

A scientific diagram of a measuring cylinder.

(Left image: Lilly_M, Wikimedia Commons)

 

Test Tube

 
test tube scientific diagram

A scientific diagram of a test tube.

(Left image: imagedb.com, Adobe Stock)

 

Glass Funnel

 
glass funnel scientific diagram

A scientific diagram of a glass funnel.

(Left image: benvenutik, Adobe Stock)

 

Round-Bottom Flask

 
round bottom flask scientific diagram

A scientific diagram of a round-bottom flask.

(Left image: Lilly_M, Wikimedia Commons)

 

Glass Rod

 
glass rod scientific diagram

A scientific diagram of a glass rod.

(Left image: TarnPraewan, Wikimedia Commons)

 

Watch Glass

 
watch glass scientific diagram

A scientific diagram of a watch glass.

(Left image: Ilja, Wikimedia Commons)

 

Bunsen Burner

 
bunsen burner scientific diagram

A scientific diagram of a Bunsen burner.

(Left image: Polimerek, Wikimedia Commons)

 

Tripod

 
tripod scientific diagram

A scientific diagram of a tripod.

(Left image: NagayaS, )

 

Wire Gauze

 
wire gauze scientific diagram

A scientific diagram of a wire gauze.

(Left image: tammcd, Pixabay)

 

Retort Stand, Bosshead and Clamp

 
retort stand bosshead clamp scientific diagram

A scientific diagram of a retort stand, bosshead and clamp.

(Left image: Tsaenmai, Wikimedia Commons)

 

Evaporating Dish

 
evaporating dish scientific diagram

A scientific diagram of an evaporating dish.

(Left image: Simon A. Eugster, Wikimedia Commons)

 

Crucible

 
ceramic laboratory crucible scientific diagram

A scientific diagram of a crucible and lid.

(Left image: Good Science)

 

Pipeclay Triangle

 
pipeclay pipe clay triangle scientific diagram

A scientific diagram of a pipeclay triangle.

(Left image: Good Science)

 

Safety Mat

 
safety mat scientific diagram

A scientific diagram of a safety mat.

(Left image: Good Science)

 

Summary

  • Scientific diagrams are a systematic way of representing scientific equipment and experiments in a simple and clear manner.
    They are drawn according to a set of rules:
    1. Use a sharp lead pencil.
    2. Draw objects in two dimensions.
    3. Draw clean, single lines.
    4. Don’t close off openings of glassware.
    5. Use a ruler to draw straight lines.
    6. Don’t shade or colour in.
    7. Don’t ‘float’ objects.
    8. Label objects with simple straight lines.

 
drawing scientific laboratory diagrams

 
 

(Header image: Hanna, Adobe Stock)

 

BUY THE YEAR 7 CHEMISTRY WORKBOOK