This fully-resourced lesson describes how the different properties of water make this biological molecule incredibly important in Biology. The engaging PowerPoint and accompanying worksheets have been designed to cover point 1.7 of the AQA A-level Biology specification.
Hydrolysis reactions have been a recurring theme throughout topic 1, so the start of this lesson challenges the students to recognise the definition when only a single word is shown: water. Students will also recall the meaning of a condensation reaction. Moving forwards, the rest of the lesson focuses on the relationship between the structure and properties of water, beginning with its role as an important solvent. The lesson has been specifically written to make links to future topics and this is exemplified by the transport of water along the xylem in plants. A quick quiz round is used to introduce cohesion and tension so students can understand how the column of water is able to move along this vascular tissue without interruption. The next section focuses on the high latent heat of vaporisation and heat capacity of water and these properties are put into biological context using thermoregulation and the maintenance of a stable environment for aquatic animals. The lesson finishes with an explanation of the polar nature of water, a particularly important property that needs to be well understood for a number of upcoming topics, such as cell membranes.
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