89
cleaned by…………………. Jets of water . The oily water
is
retained in the compartments until the oil floats to the top , the
water beneath is…………………………to the sea.
3- Even ships require ………………………or maintenance , and
during this process small amounts of oil is discharged into the
sea.
4- When ships are broken up into different parts or what we call
…………………………..some oil and toxic materials
may
contaminate the water.
5- Tanker accidents
are extremely dangerous
when the
……………………is broken , or when the tanker is in
………………..
6- ………………………..contribute also to water pollution as the
hydrocarbons compounds released into the atmosphere can reach
the ocean through ………………….
7- The thinlayer of oil floating on the surface of water
is
called……………………………….., and different
techniques
are used in order to contain oil spill in the ocean such as
…………….
8- Rocky shores are………………………by oil spill as they are
…………………enregy environments .
9- Oil compounds are ………………..to marine life at all levels.
10Fresh
oil
is
more
…………………..than
…………………oil that had spent several days in the ocean and
lost most of its toxic………………..
11Some marine ……………..avoid being contaminated with
oil compounds as they secrete ……………………..which prevent
oil adhering to them.
12Oil spill can cause …………………..in the balance of the
food chain , as it can cause a…………………..of some species
and the emergence of other ones that thrive and dominate
certain habitats in the absence of their natural ………………….
13Effects of oil pollution may persist on marine organisms
for………………..
14The impact of oil pollution on beach depends on the
nature of the…………….. , compacted sediments
are