2A @ wearetooamazinlyawesome.bs.com ;D

Thursday, February 3, 2011@ 10:35 AM

oh well i guess no one ever comes here anymore, but..............

HAPPY CHINESE NEW YEAR 2AMAZINGLY AWESOME!

i miss our class D: maybe we could go out eat eat sometimes soon..

never forget 2A okay!

#6 jerelyn!

Thursday, October 28, 2010@ 8:28 PM

found this on facebook, so in case you forgot what the lang arts homework is, here it is:

Monday, October 25, 2010@ 11:13 AM

Geography End-Of-Year Examination Answers:

1. (a) - Build a network of irrigation canals (1/2) in drought-prone areas so as to ensure a steady supply of water for farming all year round (1/2).

- Replace current seeds with those drought resistant, genetically modified species (1/2) to withstand long period of drought so that there is less chance of crop failure (1/2).

- Creating reservoirs (1/2) behind dam to ensure that there is water stored during wet season for use in drought period (1/2).
(b)(i) - Pest-resistant GM species (1/2). As crops are prone to pest attacks which greatly reduced the farmers’ yield, they have to use the seeds that are genetically modified to be pest resistant so that their earnings won’t be greatly affected. (1/2)

- Fast maturing (1/2) More cropping (1/2) can be grown within a year (or with the same land area) hence increasing the yield per unit land area.

- High yielding (1/2). Each crop cultivated gives the farmer a much higher output (1/2) as compared to traditional species.
(b)(ii) - Land tenure: in many less economically developed countries, the farmers do not own the land there thus there is little motivation for the farmers to use modern technology.

- Lack of knowledge. The farmers in the rural areas often do not know or understand (1/2) the procedures thus they are less inclined to use modern technology. (1/2)

- Land fragmentation (1/2): traditional practices (such as division of land among children) may result in each farmer getting small plots of land and it is not economical to increase productivity by irrigating or using machines on a small area. (1/2)

(c) [MISSING]
2. Level 3 (5 – 6m)

[5m] Describe the benefits and limitations of GM in overcoming the two problems mentioned in the question.

[6m] Describe the benefits and limitations of GM in overcoming the two problems mentioned in the question with clear elaboration.

Agree

- Fast maturing and high yielding species. Increases food supply despite limited land supply to meet the demand of a growing world population.

- Less stress on resources. As more crops can be grown on existing farmland, GM can help to reduce competition for land and water and thus less strain on their resources.

Disagree

- High cost deters farmers. GM seeds & technology are expensive

- Few farmers can afford capital thus they are not always able to reap the high yield of GM seed. Thus they are not motivated to cultivate GM species.

- Long term environment problem. Plants may be more resistant to pests/diseases and may cross-pollinate with weeds to create Super Weed OR Loss of biodiversity: Natural species cannot compete with stronger GM species and get colonized quickly, resulting in their extinction and these are loss of natural species

3. (a)(i) - Excessive use of fertilisers and pesticides may cause land pollution and soil degradation when the chemicals are washed into the soil. These chemical pesticides and fertilisers contaminate the water in the river when it flows into the river as surface run off when it rains, or when it infiltrates into the groundwater system.

- Chemical pesticides degrade the river’s water quality as it may poison the aquatic organism, causing genetic mutation and death.

- Chemical fertilisers degrade the river’s water quality as it leads to eutrophication, the growth of algae and plankton causes aquatic plants to die due to lack of sunlight penetrating the water surface. As a result, aquatic organisms eventually die from lack of oxygen.

ii) - It is important to prevent or control water pollution as it might cause the death of aquantic plants and fishes in rivers or lakes.

- Loss of food.

- [MISSING]

- People may die or be poisoned (bioaccumulation) when they eat fish or shellfish contaminated by the toxins from industrial waste/affluence.

- Toxins released by the algae may also contaminate water supply.

(b) (i) 7.2%

(ii) Methane (1). Wet rice cultivation: bacteria activity in flooded rice area (1) OR cattle ranching: bacteria activity

(c) - It is necessary for Singapore to increase our recycling rate because with an increase in population and human activity, more waste will be produced in the future. Recycling helps to minimise waste and reduce pollution.

-Recycling reduces amount of waste products so that less is being produced and incinerated. As less waste is burnt in incinerators, less carbon dioxide, smoke and dust particles is released in to the atmosphere, hence reducing air pollution and greenhouse gas emissions

- Recycling helps conserve the environment and supports sustainable development as new things can be made from used materials. This reduces the need for raw materials. For example, old newspapers can be recycled to be made into new paper products like egg cartons or cardboard.

- Semakau Landfill might be full one day (2040) so minimising waste through recycling helps to extend lifespan of the landfill.

4. (a) (i) [MISSING]

(ii) – Haze is a form of transboundary pollution which can drift thousands of kilometres from Kalimantan and Sumatra in Indonesia; it will affect other Southeast Asian countries like Singapore, Malaysia and Brunei.

- As evident, schools in industries are closed as people are advised to stay indoors. Schools in the region might close or stop outdoor activities to prevent health problems.

- The haze disrupted air travel in Indonesia and probably affects travel within the region. This might … [MISSING]

- [MISSING]

b) Agree – Air quality in Singapore will worsen as a result of …

Population Growth:

1. Power generation

- Increase in household consumption of energy or electricity so more fossil fuel is used to generate power.

- Pollutants like dust, smoke, particulate matter, soot and sulphur dioxide is released into the atmosphere.

2. Garbage or waste

- More people could also mean more waste generated daily.

- Increase in waste incineration produces more dust, sulphur dioxide, PM10 etc.

3. Motor Vehicles

- With population increase and economic development.

- Industrial growth. [MISSING]

- Motor vehicles. [MISSING]-

Disagree

- switch to natural gas in power stations as it is a cleaner fossil fuel than crude oil or coal

- conserve electricity by switching to energy saving appliances (e.g. light bulb, air con and refrigerators)

- encourage people to reduce amount of waste produced through publishing education such as campaigns and talks to inform people about harmful effects of excessive waste on the environment.

- channel electricity generated from incineration plants to supple households with power instead so that less fossil fuel is needed for electricity.

- Practise the 3Rs-reduce, reuse, recycle -- to decrease amount of waste that needs to be incinerated

-Channel electricity generated from the incineration plants to supply household with power instead, so that less fossil fuel needed for electricity

(Motor vehicles)

-Measures like COE discourage car ownership

- Change public transport to greener or hybrid vehicles, so it produces fewer pollutants

5 (a) (i) -The US shows a period of steady/continuous increase of CO2 emissions from 1960 to 1970 from just under 800 million tons in 1960 to 1200 million tons in 1970.

-Both countries show a general increasing trend between 1950 to 2010 (1/2 mark) Emissions from the US increase from 600 million tons to 1600 tons while emissions in china rose from around 50 million tons to over 1800 million tons (1/2 mark)

- Population growth in US and China/ an increase in economic development and standards of living

- Higher domestic and industrial energy consumption, requiring more burning of fossil fuels in power plants to generate electricity.

- The US has higher CO₂ emissions than China at the start of 1950, producing around 700 million tons compared to less than 50 million tons for China.

ii) - There has been population growth in both the US and China or an increase in economic development and standard of living.

- More human waste, which leads to more waste being incinerated.

- Increase in vehicle populations, leading to increase in vehicle exhaust.

- Higher demand for manufactured goods, leading to more industrial processes (the manufacturing and transporting of products that generate CO2.

- Higher domestic and industrial energy consumption, requiring more burning of fossil fuels in power plants to generate electricity

- Increased deforestation as more land is required for agriculture and development, results in less carbon dioxide absorbed by vegetation.
5(b) An increase in sea levels will result in flooding of the low-lying coastal regions in Singapore. This will result in people living in those areas (e.g. Marine Parade) having to relocate to further inland. Heavy rainfall may result in flooding of low-lying areas. This will cause damage to vehicles and property. Temperature extremes and heat waves will result in increased incidents of heat stroke. At-risk individuals (the young, elderly and those engaged in strenuous physical activity) may die from the condition.

Answers courtesy of Cheryl.

Labels: #05

Monday, October 18, 2010@ 6:28 PM

Hey 2A these are the cheers for orange house :)

Tuesday, October 12, 2010@ 5:46 PM

YAY! Yesterday's kbox was fun!!
LOVE the bonding between the class. (at least the guys sang...) haha
hope to have more fun during the chalet!!

P.S. 2A i love u!!

Loves,
Peishan

Sunday, September 12, 2010@ 8:05 PM

Jiayou 2A! Tomorrow school reopen, dont forget to come school LOL!
Lets chiong EOY EXAMS! :)

jerelyn(:

geography wsFriday, September 3, 2010@ 9:52 PM

the purpose of posting this is cos ms tan said it is clearer. but my scanner sucks so i don't think it made any difference. i think the last 2 pages we don't have so don't care. but i just upload lah.

initially JH say pin on notice board but it's damn stupid lah who the heck will see it. supposedly clearer than worksheet but may not be through cos i don't have an ultra-awesome scanner.

Labels: #05

history@ 9:38 PM

history exam scope. i think you all can just ignore the comment cos i don't know how you're gonna get the form anyway...

Labels: #05

Thursday, August 26, 2010@ 8:06 PM

HEYS 2A,
JIAYOUS FOR TOMORROW'S BIO TEST OKAYS! (:
jiayoujiayousjiayou!

and for malay too! (:

._.Saturday, August 7, 2010@ 9:59 PM

hi correction to peishan's post!

Maths test 6 up, topics on mensuration (all the stupid volumes and surface areas). Yeah i know it's shit. I think so too. BAH. but i think i'll miss it...

Labels: #05

profile entries linkage others
Presenting to you river valley's 1A'09 (1A-owns) and 2A'10! (Too Amazingly Awesome) We're back in year two better than ever, together and forever (Y) We have 30 species of children, with 22 girls and 8 boys :) And don't forget, A is for Awesome, we are 2A ;D	Our beloved teachers! Form teacher: Ms Jasmine Goh Pei Shan Co-form teacher: Ms Chew Hwee LA teachers: Mrs Look Wee Choo, Mrs Josephine Woon Chinese teacher: Ms Jasmine Goh Pei Shan Maths teacher: Mr Desmon Lim Sciences: (Physics) Mr Choo Shueh Yi (Chemistry) Mr Lim Guan Shin (Biology) Ms Sandy Pan History: Mr Chia Geography: Ms Tan Wan Ting Malay: Cikgu Ros Recent updates Racial Harmonday Day Celebration CIP @ St Joseph's Home on 28 July	Thursday, February 3, 2011@ 10:35 AM oh well i guess no one ever comes here anymore, but.............. HAPPY CHINESE NEW YEAR 2AMAZINGLY AWESOME! i miss our class D: maybe we could go out eat eat sometimes soon.. never forget 2A okay! #6 jerelyn! Thursday, October 28, 2010@ 8:28 PM found this on facebook, so in case you forgot what the lang arts homework is, here it is: Monday, October 25, 2010@ 11:13 AM Geography End-Of-Year Examination Answers: 1. (a) - Build a network of irrigation canals (1/2) in drought-prone areas so as to ensure a steady supply of water for farming all year round (1/2). - Replace current seeds with those drought resistant, genetically modified species (1/2) to withstand long period of drought so that there is less chance of crop failure (1/2). - Creating reservoirs (1/2) behind dam to ensure that there is water stored during wet season for use in drought period (1/2). (b)(i) - Pest-resistant GM species (1/2). As crops are prone to pest attacks which greatly reduced the farmers’ yield, they have to use the seeds that are genetically modified to be pest resistant so that their earnings won’t be greatly affected. (1/2) - Fast maturing (1/2) More cropping (1/2) can be grown within a year (or with the same land area) hence increasing the yield per unit land area. - High yielding (1/2). Each crop cultivated gives the farmer a much higher output (1/2) as compared to traditional species. (b)(ii) - Land tenure: in many less economically developed countries, the farmers do not own the land there thus there is little motivation for the farmers to use modern technology. - Lack of knowledge. The farmers in the rural areas often do not know or understand (1/2) the procedures thus they are less inclined to use modern technology. (1/2) - Land fragmentation (1/2): traditional practices (such as division of land among children) may result in each farmer getting small plots of land and it is not economical to increase productivity by irrigating or using machines on a small area. (1/2) (c) [MISSING] 2. Level 3 (5 – 6m) [5m] Describe the benefits and limitations of GM in overcoming the two problems mentioned in the question. [6m] Describe the benefits and limitations of GM in overcoming the two problems mentioned in the question with clear elaboration. Agree - Fast maturing and high yielding species. Increases food supply despite limited land supply to meet the demand of a growing world population. - Less stress on resources. As more crops can be grown on existing farmland, GM can help to reduce competition for land and water and thus less strain on their resources. Disagree - High cost deters farmers. GM seeds & technology are expensive - Few farmers can afford capital thus they are not always able to reap the high yield of GM seed. Thus they are not motivated to cultivate GM species. - Long term environment problem. Plants may be more resistant to pests/diseases and may cross-pollinate with weeds to create Super Weed OR Loss of biodiversity: Natural species cannot compete with stronger GM species and get colonized quickly, resulting in their extinction and these are loss of natural species 3. (a)(i) - Excessive use of fertilisers and pesticides may cause land pollution and soil degradation when the chemicals are washed into the soil. These chemical pesticides and fertilisers contaminate the water in the river when it flows into the river as surface run off when it rains, or when it infiltrates into the groundwater system. - Chemical pesticides degrade the river’s water quality as it may poison the aquatic organism, causing genetic mutation and death. - Chemical fertilisers degrade the river’s water quality as it leads to eutrophication, the growth of algae and plankton causes aquatic plants to die due to lack of sunlight penetrating the water surface. As a result, aquatic organisms eventually die from lack of oxygen. ii) - It is important to prevent or control water pollution as it might cause the death of aquantic plants and fishes in rivers or lakes. - Loss of food. - [MISSING] - People may die or be poisoned (bioaccumulation) when they eat fish or shellfish contaminated by the toxins from industrial waste/affluence. - Toxins released by the algae may also contaminate water supply. (b) (i) 7.2% (ii) Methane (1). Wet rice cultivation: bacteria activity in flooded rice area (1) OR cattle ranching: bacteria activity (c) - It is necessary for Singapore to increase our recycling rate because with an increase in population and human activity, more waste will be produced in the future. Recycling helps to minimise waste and reduce pollution. -Recycling reduces amount of waste products so that less is being produced and incinerated. As less waste is burnt in incinerators, less carbon dioxide, smoke and dust particles is released in to the atmosphere, hence reducing air pollution and greenhouse gas emissions - Recycling helps conserve the environment and supports sustainable development as new things can be made from used materials. This reduces the need for raw materials. For example, old newspapers can be recycled to be made into new paper products like egg cartons or cardboard. - Semakau Landfill might be full one day (2040) so minimising waste through recycling helps to extend lifespan of the landfill. 4. (a) (i) [MISSING] (ii) – Haze is a form of transboundary pollution which can drift thousands of kilometres from Kalimantan and Sumatra in Indonesia; it will affect other Southeast Asian countries like Singapore, Malaysia and Brunei. - As evident, schools in industries are closed as people are advised to stay indoors. Schools in the region might close or stop outdoor activities to prevent health problems. - The haze disrupted air travel in Indonesia and probably affects travel within the region. This might … [MISSING] - [MISSING] b) Agree – Air quality in Singapore will worsen as a result of … Population Growth: 1. Power generation - Increase in household consumption of energy or electricity so more fossil fuel is used to generate power. - Pollutants like dust, smoke, particulate matter, soot and sulphur dioxide is released into the atmosphere. 2. Garbage or waste - More people could also mean more waste generated daily. - Increase in waste incineration produces more dust, sulphur dioxide, PM10 etc. 3. Motor Vehicles - With population increase and economic development. - Industrial growth. [MISSING] - Motor vehicles. [MISSING]- Disagree - switch to natural gas in power stations as it is a cleaner fossil fuel than crude oil or coal - conserve electricity by switching to energy saving appliances (e.g. light bulb, air con and refrigerators) - encourage people to reduce amount of waste produced through publishing education such as campaigns and talks to inform people about harmful effects of excessive waste on the environment. - channel electricity generated from incineration plants to supple households with power instead so that less fossil fuel is needed for electricity. - Practise the 3Rs-reduce, reuse, recycle -- to decrease amount of waste that needs to be incinerated -Channel electricity generated from the incineration plants to supply household with power instead, so that less fossil fuel needed for electricity (Motor vehicles) -Measures like COE discourage car ownership - Change public transport to greener or hybrid vehicles, so it produces fewer pollutants 5 (a) (i) -The US shows a period of steady/continuous increase of CO2 emissions from 1960 to 1970 from just under 800 million tons in 1960 to 1200 million tons in 1970. -Both countries show a general increasing trend between 1950 to 2010 (1/2 mark) Emissions from the US increase from 600 million tons to 1600 tons while emissions in china rose from around 50 million tons to over 1800 million tons (1/2 mark) - Population growth in US and China/ an increase in economic development and standards of living - Higher domestic and industrial energy consumption, requiring more burning of fossil fuels in power plants to generate electricity. - The US has higher CO₂ emissions than China at the start of 1950, producing around 700 million tons compared to less than 50 million tons for China. ii) - There has been population growth in both the US and China or an increase in economic development and standard of living. - More human waste, which leads to more waste being incinerated. - Increase in vehicle populations, leading to increase in vehicle exhaust. - Higher demand for manufactured goods, leading to more industrial processes (the manufacturing and transporting of products that generate CO2. - Higher domestic and industrial energy consumption, requiring more burning of fossil fuels in power plants to generate electricity - Increased deforestation as more land is required for agriculture and development, results in less carbon dioxide absorbed by vegetation. 5(b) An increase in sea levels will result in flooding of the low-lying coastal regions in Singapore. This will result in people living in those areas (e.g. Marine Parade) having to relocate to further inland. Heavy rainfall may result in flooding of low-lying areas. This will cause damage to vehicles and property. Temperature extremes and heat waves will result in increased incidents of heat stroke. At-risk individuals (the young, elderly and those engaged in strenuous physical activity) may die from the condition. Answers courtesy of Cheryl. Labels: #05 Monday, October 18, 2010@ 6:28 PM Hey 2A these are the cheers for orange house :) Tuesday, October 12, 2010@ 5:46 PM YAY! Yesterday's kbox was fun!! LOVE the bonding between the class. (at least the guys sang...) haha hope to have more fun during the chalet!! P.S. 2A i love u!! Loves, Peishan Sunday, September 12, 2010@ 8:05 PM Jiayou 2A! Tomorrow school reopen, dont forget to come school LOL! Lets chiong EOY EXAMS! :) jerelyn(: geography wsFriday, September 3, 2010@ 9:52 PM the purpose of posting this is cos ms tan said it is clearer. but my scanner sucks so i don't think it made any difference. i think the last 2 pages we don't have so don't care. but i just upload lah. initially JH say pin on notice board but it's damn stupid lah who the heck will see it. supposedly clearer than worksheet but may not be through cos i don't have an ultra-awesome scanner. Labels: #05 history@ 9:38 PM history exam scope. i think you all can just ignore the comment cos i don't know how you're gonna get the form anyway... Labels: #05 Thursday, August 26, 2010@ 8:06 PM HEYS 2A, JIAYOUS FOR TOMORROW'S BIO TEST OKAYS! (: jiayoujiayousjiayou! and for malay too! (: ._.Saturday, August 7, 2010@ 9:59 PM hi correction to peishan's post! Maths test 6 up, topics on mensuration (all the stupid volumes and surface areas). Yeah i know it's shit. I think so too. BAH. but i think i'll miss it... Labels: #05	affiliates Fellow classmates! : Cheryl ; Qian Xuan ; Wan Qi ; Jerelyn ; Krysen ; Kai Xing ; Monica ; Si Ci ; Sophia ; LiLing ; Thaddea ; Shiya ; Ze ping ; Year two classes : 2B / 2C / 2D / 2E / 2F / 2G / 2H/ 2I/ 2J / 2K / 2L / 2A09	credits Edited by 2A :) Layout: Nic ole Inspiration: electro-pop% Color Codes: Html Color Codes Monthly archive » January 2010 » February 2010 » March 2010 » April 2010 » May 2010 » June 2010 » July 2010 » August 2010 » September 2010 » October 2010 » February 2011 By post » oh well i guess no one ever comes here anymore, bu... » found this on facebook, so in case you forgot what... » Geography End-Of-Year Examination Answers: 1. (a... » Hey 2A these are the cheers for orange house :) » YAY! Yesterday's kbox was fun!!LOVE the bonding be... » Jiayou 2A! Tomorrow school reopen, dont forget to ... » geography ws » history » HEYS 2A,JIAYOUS FOR TOMORROW'S BIO TEST OKAYS! (:j... » ._.	The awesome 30! #1 Cheryl ; SJAB #2 Siew Yeng ; Wushu #3 Fang Ting ; NPCC #4 Qian Xuan ; Wushu #5 Wan Qi ; Netball #6 Jerelyn ; SJAB #7 Jessie ; Badminton #8 Krysen ; Netball #9 Pei Shan ; Wushu #10 Jia Yan ; Girl Guides #11 Kai Xing ; Netball #12 Xuan Jim ; Badminton #13 Monica ; String Ensemble #14 Si Ci ; Cross Country #15 Nicole ; Infocomm #16 Sophia ; String Ensemble #17 Li Ling ; Wushu #18 Xue Hui ; Girl Guides #19 Kai Yun ; SJAB #20 Thaddea ; Cross Country #21 Yhim Ghee ; Badminton #22 Shi Ya ; Band #23 Wen Xuan ; NCC #24 Ze Ping ; SJAB #25 Terence ; NCC #26 Jian Hao ; Volley Ball #27 Gerald ; Mindsports #28 Wei Li ; Scouts #29 Shi Cheng ; Wushu #30 Wen Yi ; Choir Class commitee Chairpersons: Wen Xuan, Thaddea Treasurers: Kai Yun, Sophia Welfare Leaders: Wan Qi, Kai Xing, Krysen, Jiayan AV rep: Wenyi, Jerelyn CIP rep: Liling and Qianxuan Green Rep: Xue Hui, Siew Yeng English rep: Monica Chinese rep: Cheryl Maths rep: Pei Shan Science rep: Shi Ya Geography rep: Jian Hao History rep: Zeping Malay rep: Shi Cheng Health Ambassadors: Fangting, Terence Happy birthday January 03: Krysen 07: Jia Yan February 8: Yhim Ghee & Weili 25: Liling 26: Kai Yun March 25: Nicole 27: Jessie April 10: Jian Hao 12: Wen xuan & Sophia May 01: Zeping 08: Xuan Jim 21: Sici June 08: Qian Xuan 24: Pei Shan 26: Xue Hui & Jerelyn 30: Siew Yeng July 27: Wan Qi August 20: Wen Yi 26: Shi Cheng 27: Kai Xing September 26: Shiya October November 9: Thaddea December