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WorksheetsREVISION-IMPACT ON WATER
Total questions: 15
Worksheet time: 14mins
Based on the graph, US uses water the most in ______
irrigation and agricultural crops
livestock, mining, and aquaculture
thermoelectric power
industry
Which is/are the possible effects of excessive nutrients [nitrates and phosphates] carried by agricultural runoff into our bodies of water?
algal bloom
sunlight is unable to penetrate to the bottom of the river or lake.
death of aquatic plants and animals
all of the above
Which one describes algal bloom?
rapid growth of algae on bodies of water
increase in population of aquatic plants
growth of aquatic animals
nutrient-rich river resulting to increase in the population of fish
Look at the graph below. What is the main source of ocean pollution?
dumping trash into the ocean
airborne pollutants
runoff from land
offshore mining
______________________ is water that is beneath the earth’s surface in sediment or rock formation.
surface water
water pollution
waste water
groundwater
An underground layer of rock or sediment that holds water
watershed
groundwater
permeability
aquifer
What is the advantage of planting trees along a river or lake?
It will make these surface water fresh.
Trees will absorb the pollutants in the water.
The trees will reduce the excessive erosion of sediments, thus protecting the aquatic organisms.
The trees will make the view attractive to tourists.
What are the negative effects of building dams?
It blocks migratory fish that intends to reproduce.
It causes water to dry downstream.
It causes high water level downstream.
It will cause plants to die downstream.
The rapid growth of a population of algae in either a freshwater or saltwater environment is call a(n)
red tide
algal bloom
protozoan
Water pollution occurs when ________
Harmful substances enter a water supply
Industries dispose of waste safely and correctly.
Industries dispose waste on bodies of water.
All are correct.
Which of the following is not a natural cause of water pollution?
Volcanoes
Animal waste
Oil spills
Sediments from storms and floods
Three of these are the effects of water pollution.
Death of animals
habitat destruction
humans get sick
lung damage
