IB Biology SL A1.1 Water Questions

a. cohesion is caused by the polarity of water

OR

water molecules have a negative and positive end;

b. water molecules are attracted to each other

OR

water molecules are linked by hydrogen bonds;

c. (cohesion) enables water to move along stems/xylem

OR

enables a continuous column of water in transpiration/transpiration pull;

d. surface tension provides a habitat for some organisms

OR

some insects can walk on the water surface because of surface tension/other verified example;

e. energy is required to overcome the intermolecular hydrogen bonds during evaporation, so evaporation removes heat and helps animals cool;

f. hydrogen bonding between water molecules (the intermolecular attraction responsible for cohesion) contributes to water's high specific heat capacity, helping to stabilize temperatures in aquatic habitats

OR

these intermolecular attractions contribute to water remaining liquid over a broad temperature range, supporting aquatic habitats;