Quiz · Surveying a Sunken Ship

Question 1What is the main topic of the listening passage?

How ships can be built to survive under water Why iron cannons rust faster than wooden hulls How marine archaeologists carefully study sunken ships How divers are trained to photograph the seabed

Question 2What do divers do before touching anything on a wreck?

They photograph every object in its original position They divide the seabed into numbered squares They remove the wooden hull from the mud They soak the timbers in special tanks

Question 3Why must recovered timbers soak in special tanks for many years?

The tanks slowly clean salt and rust from the wood Removing them from water too fast would make them collapse The wood needs years to return to its original shape Museums require long safety tests before displaying objects