1.accumulate (v.)
a. excessive richness of nutrients in a lake or
other body of water, frequently due to runoff
from the land, which causes a dense growth of
plant life and death of animal life from lack of
oxygen.
2.pollutant (n.)
b. particular type of matter that can be touch, not
just seen, heard or imagined
3.discharge (v.)
c. to make liquid flow away
4.concentration (n.)
d. add a number to itself a particular number of
times, to increase greatly
5.drain (v.)
e. substances, like smoke, sound that can pollute
6.multiply (v.)
f. to increase (slowly after time) in quantity or
number
7.substance (n.)
g. to give official permission for somebody to
leave, to dismiss somebody from their job or
position, to perform duty, to give or send out
liquid
8.eutrophication (n.)
h. ability to stay focus, a close gathering of people or thing, an amount of substance in a liquid or in another substance
2. Complete the sentences below using the words in the Activity 1. Some words must be changed to fit with the grammar of the sentence. Some items have more than one possible answers.
1. Phosphate and nitrate are …………………………..that can be washed into rivers and they are nutrient resources of algae. A great number of bacteria takes up all oxygen in the water to decompose the dead algae, the lack of oxygen lead to the death of other marine and fresh water lives, the process is known as ………………………………..
2. The …………………………… of agricultural wastes into water sources can be harmful when the level of ……………………………….. is high enough.
3. With excessive use of fertilizers around the river banks, the amount of dangerous chemicals in water can be dramatically …………………………………
4. Different kinds of …………………………………… that have been ……………………………. in the rivers can transferred to human via the consumption of fish from polluted water.