Worksheets10.1 THREAT TO ENVIRONMENT
Total questions: 20
Worksheet time: 10mins
______________ means an environmental condition that remains the same without any reduction or depletion of natural resources, with an assured quality of the surrounding environment, for a long period of time
green technology
clumped population
environmental sustainability
random population
What are the examples of threat of environment that affect the environmental sustainability?
climate change
global warming
eutrophication
biochemical oxygen demand
A ______________ refers to the change in temperature of the earth, rainfall distribution and drastic changes of the winds,as a result of greenhouse effect phenomenon
deforestation
global warming
climate change
eutrofication
which of the following is not greenhouse gases?
carbon dioxide
methane
nitrogen oxide
CFC
carbon monoxide
how is the greenhouse effect occur?
clearing a wide area of trees in a large scale
Gases such as carbon dioxide are naturally formed but human activities have caused the increase in concentration
of these gases.
process that occurs when the water ecosystem becomes rich with nutrients, resulting in changes to the structure of the ecosystem.
__________ phenomenon causes extreme hot and dry weather which results in draught.
el nino
la nina
__________ phenomenon causes unusual heavy rain which results in a serious flood.
el nino
la nina
What is the deforestation?
clearing a wide area of trees in a large scale
Gases such as carbon dioxide are naturally formed but human activities have caused the increase in concentration
of these gases.
process that occurs when the water ecosystem becomes rich with nutrients, resulting in changes to the structure of the ecosystem.
What is the eutrophication?
clearing a wide area of trees in a large scale
Gases such as carbon dioxide are naturally formed but human activities have caused the increase in concentration
of these gases.
process that occurs when the water ecosystem becomes rich with nutrients, resulting in changes to the structure of the ecosystem.
__________ is the total amount of oxygen needed by microorganisms such as bacteria and fungi to decompose organic materials in water.
eutrophication
algal bloom
biochemical oxygen demand
chemosynthesis
A_______ BOD level indicates low quality of water source, as there are many organic substances and decomposed microorganisms in the water.
low
high
moderate
no change
A low BOD level means the water is of __________ quality as it is unpolluted and dissolved oxygen content is high.
bad
good
moderate
not affected
____________happens when there is an increase in the pollutant substances such as gases, smoke, dust and particles
water pollution
thermal pollution
air pollution
noise pollution
the deterioration of
water quality due to excessive heat dissipation
into water caused by processes that change the
water temperature refer to
water pollution
thermal pollution
air pollution
noise pollution
___________defined as sounds that disturb and cause detrimental effects to the health of humans and animals.
water pollution
thermal pollution
air pollution
noise pollution
what is Population growth explosion?
decrease in total number
of humans living in a certain area
constant number
of humans living in a certain area
increase in total number
of humans living in a certain area
what is the effect of population growth population?
enough supply of the food source
enough supply of the clean water
rapid reduction of natural resources
proper management on demand of water and natural resources
Why is the tip of the needle should be at the base of the reagent bottle while adding methylene blue solution?
To avoid oxygen from dissolve into
the water sample
To make sure that methylene blue
solution is equally distributed in the
water sample
To avoid photosynthesis by algae
To avoid carbon dioxide from
dissolve into the water sample
Which of the following are the effetcs
of noise pollution?
I High blood pressure
II Headaches
III Heart attack
1V Deafness
I, II and III only
I, II and IV only
I, III and IV only
II, III and IV only
The following statements are about eutrophication.
Which of the following sequences is correct about eutrophication?
R,P,S,Q and T
R,P,Q,T and S
Q,S,R,T and P
S,R,T,Q and P
