Summary of Water Mark Schemes
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hydrogen bonding between molecules / cohesion;
transparency allows light penetration (into cells / aquatic habitats);
high specific heat capacity so stable environment (internal / external);
surface tension allows organisms to move on surface of rivers / lakes / pools;
polarity / capillarity / adhesion – helps plants transport water;
coolant – absorbs heat when it evaporates / changes states;
ice floats – lakes / oceans do not freeze, allowing life under the ice;
buoyancy – supports organisms;
structure – turgor in plant cells / hydrostatic skeleton;
habitat – place for aquatic organisms to live;
involved in chemical reactions in organisms;
water is polar / universal solvent;
dissolves many organic / inorganic substances;
movement of water carries substances around organism;
eg blood / phloem / xylem / adhesion / cohesion;
medium for external transport (eg gametes);
contains dissolved gases;
high boiling point making liquid water available to organisms / water is liquid over a range of temperatures;