A. Content Objective: The properties of water result in unique properties that are vital for living organisms.
B. Language Objective: Explain how hydrogen bonding and dipolarity explain the cohesive, adhesive, thermal and solvent properties of water.
C. Syllabus Details:
i. Water molecules are polar and hydrogen bonds form between them.
ii. Hydrogen bonding and dipolarity explain the cohesive, adhesive, thermal and solvent properties of water.
iii. Substances can be hydrophilic or hydrophobic.
iv. Application: Comparison of the thermal properties of water with those of methane.
v. Application: Use of water as a coolant in sweat.
vi. Application: Modes of transport of glucose, amino acids, cholesterol, fats, oxygen and sodium chloride in blood in relation to their solubility in water.
Activity 1 - Pre-lesson work.
Expectations: Create a set of notes, with diagrams of water molecules to help explain, of the syllabus statements above.
Video:
Alex Lee - Properties of Water (i, ii, v)
Crash Course Biology - Properties of Water (i, ii, v)
Readings:
Bioninja - Cohesive and Adhesive Properties (ii)
Bioninja - Water Structure (i)
Bioninja - Solvent Properties of Water (ii, vi, iii)
Bioninja - Water and Thermal Properties (ii, iv)
Book Resources:
Oxford pg 68-71
Activity 2 - Water Circus Activity
Key concepts to be looking for; more than one may be seen in a station.
Surface tension
Cohesion
Adhesion
Universal solvent
Polarity
Hydrogen bonding
High heat of vaporization (means it requires a lot of energy to change state)