When a ship sinks, the rate of decay and corrosion may be dependent on the final depth of the wreck
Students learn to:
-
outline the effect of:
– temperature
– pressure
on the solubility of gases and salts - identify that gases are normally dissolved in the oceans and compare their concentrations in the oceans to their concentrations in the atmosphere
- compare and explain the solubility of selected gases at increasing depths in the oceans
- predict the effect of low temperatures at great depths on the rate of corrosion of a metal
Students:
- perform a first-hand investigation to compare and describe the rate of corrosion of materials in different :
– oxygen concentrations
– temperatures
– salt concentrations - use available evidence to predict the rate of corrosion of a metal wreck at great depths in the oceans and give reasons for the prediction made