Objective: Students will be able to identify the impact that barnacles can have on aquatic vessels and efforts being made to prevent their ability to adhere to them.

1	What is the key problem of barnacles attaching to the under surfaces of boats that was identified in this video?
	A)	They can corrode the iron/steel that make up the vessel.
	B)	They can slow down the vessel as it moves through the water.
	C)	They can get into the intake ports and damage the engine.
	D)	They can alter the steering ability of the boat.
2	Why is the use of paint that has toxic metals discouraged as a treatment for barnacle attachment?
	A)	They have not proved successful.
	B)	The metals accumulate in the environment.
	C)	The paint is too costly.
	D)	The metals used for the paint are hard to obtain.
3	Which of the following is an example of a new coating being developed to prevent barnacles from attaching to it?
	A)	Surfaces that produce a bioluminescent glow
	B)	Surfaces that conduct small electrical current
	C)	Surfaces that attract water
	D)	Surfaces that have a roughened texture to make it difficult for attachment