2015 PSLE Discussion and Strategies
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nlhyx:
Oh that qn. I forgot the options tooPopick:
Okay. I'm confused abt that bulb qn u all r discussing. What qn is it? What's it abt? #toomuchdiscussion
it is an mcq question asking which bulb arrangment is brighter but i cannot remember options, 2 are series while 2 are parallel.
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that question was easy though huehuehue
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curiousage:
that question was easy though huehuehue
Agreed. I guess qns on brightness of bulbs r quite easy... -
curiousage:
that question was easy though huehuehue
yes, that question and the rest of booklet a was fairly easy
tbh, the paper itself was not that diffcult, not sure why classmates (we are in the top class) say it was tough, even those who excel in science...
maybe i'm overlooking some parts *huddles up and rocks back and forth at the prospect* -
I think the paper was quite tough
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Lol222:
I think the paper was quite tough
Me too! -
One of the pollution by human activity: Increase in fertilizers to grow more food. These results in an increase in nutrients (nitrates and phosphates) in the water which causes enhanced plant growth (algal blooms). When this plant material dies and decays the bacteria uses the oxygen in the water. This lowering of oxygen levels results in the death of other water life that needs oxygen to survive, eg. fish, etc. This process is called eutrophication; litter, which causes disease and has a negative visual impact.
Ans to that mcq is nutrients. My boy put \"nutrients\".
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Lisa Wong:
i tot the graph for nutrients decreased drastically till the end and increased slightly. And the graph for bacteria increased till the end and decreased slightly?One of the pollution by human activity: Increase in fertilizers to grow more food. These results in an increase in nutrients (nitrates and phosphates) in the water which causes enhanced plant growth (algal blooms). When this plant material dies and decays the bacteria uses the oxygen in the water. This lowering of oxygen levels results in the death of other water life that needs oxygen to survive, eg. fish, etc. This process is called eutrophication; litter, which causes disease and has a negative visual impact.
Ans to that mcq is nutrients. My boy put \"nutrients\". -
MathIsAwesome:
This explanation does not fit the graph as it shows that the nutrients decreases. However, if this is the explanation then the bacteria should increase because of the decomposition. Just my two cent worth.
i tot the graph for nutrients decreased drastically till the end and increased slightly. And the graph for bacteria increased till the end and decreased slightly?Lisa Wong:
One of the pollution by human activity: Increase in fertilizers to grow more food. These results in an increase in nutrients (nitrates and phosphates) in the water which causes enhanced plant growth (algal blooms). When this plant material dies and decays the bacteria uses the oxygen in the water. This lowering of oxygen levels results in the death of other water life that needs oxygen to survive, eg. fish, etc. This process is called eutrophication; litter, which causes disease and has a negative visual impact.
Ans to that mcq is nutrients. My boy put \"nutrients\". -
Could anyone please post the full question on the fertiliser that was thrown into the river and fishes died. Follow by those graph on nutrient and bacteria etc? My boy only explained to me briefly. He asleep now. Thanks!
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