CELPIP Reading Part 3Reading for Information Practice

A. Wood buried in wet, oxygen-poor sediment may escape the rapid decay that normally occurs near the surface. Over time, however, microorganisms can remove much of the strong material inside its cell walls. Water fills the weakened spaces and temporarily preserves the original shape despite severe internal loss. An excavated object may therefore appear solid even though its structure depends heavily on remaining wet. Observations of why buried wet wood may appear intact show why the same process may appear somewhat different from one site to another as surrounding conditions continue to change.

B. If untreated wood dries in ordinary air, surface tension pulls weakened cell walls inward as water evaporates. The object can shrink, crack, twist, or lose carved detail before a conservator can reverse the change. Keeping the find cool and wet after excavation prevents immediate collapse but is only a temporary measure. Water quality must be controlled because salts and microbes can continue damaging the stored object. Understanding conservation of archaeological waterlogged wood therefore requires attention to both immediate effects and slower forms of change within the whole connected system.

C. Conservators first remove loose sediment while documenting fragile surfaces and any attached materials. They may soak the wood repeatedly so harmful soluble salts move into clean treatment water. A stabilizing substance gradually replaces part of the water and supports spaces within the weakened cells. The concentration changes slowly because rapid exchange could create unequal stress between the surface and interior. For cleaning and replacement of water, this wider context prevents one striking feature from being mistaken for the whole story during a quick first inspection.

D. Freeze-drying removes remaining water as vapour from frozen wood, avoiding a liquid stage that produces strong surface tension. Large objects may require long treatment periods and custom tanks, supports, or drying chambers. After conservation, stable temperature and humidity reduce movement in the treated wood and its supporting materials. Monitoring remains essential because salts, cracks, or changes in the consolidant can appear years after exhibition. Together, these details place conservation of archaeological waterlogged wood within a broader pattern shaped by the surrounding environment over a meaningful period of time.

E. Not given in any of the above paragraphs.