WorksheetsHuman_Eco_Quiz_3
Total questions: 10
Worksheet time: 6mins
A ________ is a structure built in order to store river or tidal water
pond
dam
tank
Uses of Dams:
controlling floods
producing hydroelectric power
supply water for irrigation, industry
tourism
Advantages of dams:
Reduce downstream flooding.
Supply irrigation water for croplands.
Water released from dams to generate electricity
increase river silting below the dam.
Disadvantages of dams:
Disrupt spawning and migration of some fish species.
Reduce nutrients replishment of down stream flood plains.
Permanently submerge large areas of forests and crop lands.
Displace large number of native people.
An increased use of insecticides, pesticides and antibiotics has speeded up directional natural selection and caused genetic resistance in the pathogens
TRUE
FALSE
Use of fertilizers in agricultural fields interferes with the natural biogeochemical cycles.
TRUE
FALSE
Overgrazing by livestock results in soil erosion and increase in productivity.
FALSE
TRUE
Recently plantations of Jatropa curcare have become very popular for obtaining ______________.
petrol
biodiesel
coal
Particulate matter like:
soot
radioactives
Fine metal dust
Burning of plastics: Emit poly chlorinated biphenyles (PCBs) which are harmfull for lungs and __________
vision
stomach
head
