Pollution - Causes and Effects

Hi students~! Sorry for the lack of posts, been up to my neck recently!

Here's what you need to know about the new topic on pollution:
Basically there are 4 types of pollution - Air, water, land and noise pollution. You need to know their CAUSES, EFFECTS and MEASURES...

Air pollution - Smog and haze (effects)
Causes - Industrial emissions

Exhaust fumes - produces carbon monoxide and nitrous oxide

Natural causes - volcanic eruption

Forest fires - can be natural and also man made causes

Water Pollution - discharge of UNTREATED waste into open sea / water supply

Effects of air pollution - visibility affected in traffic conditions

Effects of air pollution - human health suffers especially those with asthma or bronchitis

Effects of air pollution - acid rain forms (corrodes outdoor statue over long period of time)

Effects of air pollution - withers trees, destroys natural environment

Effects of water pollution - livelihood of fisherman affected / tourism industry affected

Effects of pollution on human health = poisoning / diseases

Land pollution - seepage of toxic into the ground (note that this may leak into underground water)

Water pollution - caused by human dumping of rubbish

Water pollution - causes by oil spills

Land pollution - dumping of rubbish (health hazard and eye sore)

Causes of land pollution - excessive use of fertilizers and pesticides during agriculture.

Land pollution

Water pollution - algae bloom (excessive fertilizers results in algae growth) , Prevents oxygen from entering the water, fishes that comes up to the surface for O2 supply will also be affected.

Effects of noise pollution - stress and anxiety builts up

Causes of noise pollution - construction work

Causes of noise pollution - motor vehicles

Causes of noise pollution - concerts

Effects of land pollution - affects living conditions

Agriculture revision

Revision for agriculture by 206

Q: What other types of agriculture are similar to plantation agriculture? Q : What other types of farming are different from plantation agriculture?

Q : What are the advantages of High tech farming?

Q: What are the conditions of high tech farming?

Q: What is the process of shifting cultivation?

Q: What are the differences between Traditional and commercial Wet rice cultivation?

Q: What is the process of wet rice cultivation?

Basically these are the questions ive gone through with 206 today to help revise for the CA2. For 208 students, it will be more beneficial for you if you could come up with the answers to these questions first before our revision in class. Do not just purely rely on me, you have to read up and memorize some bits on your own. All the best..

Land project

Dear Priscillia and Amerlyn, can you tell me exactly what problem you are facing exactly? Isit the use of the glogster website or not knowing how to do the project?

A few of you have voiced today that you do not know how to do the project, here are some things that i am looking out for in the poster:

1. The different methods that Singapore government uses to increase more land space eg Reclaiming land, building vertically upwards...

2. Pictures of some examples

3. Explanation in your OWN WORDS (i can tell if you just copy and paste from the internet or text book!)

4. Give some advantages and disadvantages of the methods eg Environment impacts? Social impacts?

5. Reflection - What YOU think about this personally? Do you like it or not? Do you support this? Or do you have other suggestions for the singapore government?

I want you to summarize keywords, no need write long story. I love pictures and lotsa colours too!

Hey peeps! Hows your holiday been so far.. hope you are having a good rest and also fruitfully spending your time to work on what you are weak at.. If you have been slacking for the past 3 months, i think its time to WAKE UP and put in some REAL HARD WORK! When school starts, time will fly by before you know it.. enough nagging from cher, here are the homework questions for 206:

1. What are some of the advantages of each type of farming?

2. Do you think farmers might change their type of farming? eg from Traditional wet rice to commercial?

3. What can they do in their farms to improve the outputs?

As for those of you that are doing up for your online poster for LAND, kudos to your efforts.. but im sorry if your work on glogster didnt get saved like ZM and JQ.. please kindly use scrapblog instead (or if you found some other cool sites to do online posters, do let me know too.. im flexible to your ideas)

Lastly before i sign off, just a quick thought.. have you achieve any goals recently? Anything that you have set at the beginning of the year, and have achieved it or working towards achieving it? Well, i have achieved mine.. have you? lets share this when school opens...

Some questions from you...

Q1. Can we use the term 'perennial crops' to replace double/triple cropping? - Javier

Ans:

Perennial crops refers to plants that have long life span (at least a few years). Hence this type of crops does not need to be replanted after every harvest.

Double/triple cropping is the practise of growing more than 1 crop on the same land in the same season or at the same time. This reduces the growing time, and produces higher yield. The advantages are : Increased income and increase cash flow for farmers, and it maximises the land resource.

Q2. High technology farming uses artificial lighting. So is sunlight still an input? - Gerald

Ans:

Well some types of high tech farming uses artificial light to replace sunlight. However this is NOT for ALL of the high tech farms. Hence only for those farms with artificial light will WILL NOT uses sunlight as an input. Clear?

Q3. How does high tech farming benefit us?

Ans :
1. Saves space as it uses a small land area
2. Organic products are produced which are healthier for consumers
3. Environmentally friendly as soiless culture reduces the need for pesticides and herbicides
4. Efficient in the farm process due to usage of technology eg irrigation

What else can YOU think of?

Q4. Are organic products healthy? Then why do people who eat them every meal still have cancer? - Gin Wen

Ans : Yes organic products are healthy. The causes of cancer are due to many reasons other than diet. Other causes of cancer includes : Lifestyle, hereditary from family (Genes and DNA), Carinogens (Tobacco, arsenic, radiation, x-rays, the sun andcompounds in car exhaust fumes).... And so on.. hence there are many factors that leads to cancer..


Q5. What is the differences between bunds and terraces?

Terraces in wet rice cultivation are basically STEPS THAT ARE CUT INTO SLOPES to create more FLAT LAND that are suitable for farming.

However bunds are built by farmers at the edges of the fields to SEPARATE AND RETAIN water.

Lets think abit further... Can you come up with the answers to these questions?

1. What are some of the advantages of each type of farming?
2. Do you think farmers might change their type of farming? eg from Traditional wet rice to commercial?
3. What can they do in their farms to improve the outputs?

Command words - What is expected of students during exams/test in order to gain marks

Is this how you always feel whenever you see questions in a test or during an exam???

Well, i realised most of you do not understand what the question is asking because the WAY that it is PHRASED are always different and confusing!

If you want to understand the different types of questions being asked, and to know what markers are looking for, read further....

Since the test is nearing, i have some command word tips for those that are keen in answering the test.

Define
- Give a relatively short answer, number of sentences depends on the marks given
- With a precise definition/meaning of a term
- Give an example if you can

Describe
- Give a factual account of the distinctive features of an item
- DO NOT attempt to explain

Discuss
- Give a thorough description from differnt points of view

Explain
-Give a statement as to why something occurs
- Show an ability to know or understand why or how something happens
- Question may be written as "Account for", "Give reasons for", "Suggest reasons for" or "How might"

How
-Provide/demonstrate/show (depending on question) in what way/to what extent/for what reason/by what means or methods

Identify/Name/State/Give
- Give a short sentence or a single word answer

Justify
- Give an explanation why something is chosen or why it is done in a particular manner
- Or why a particular position/stand is taken

Name
- State/specify/identify using a word or words by which a specific feature is known
- Give eg which illustrate a particular feature

Refer to/With reference to
- Write an answer which uses some of the ideas provided in an illustrative technique or other additional material such as a case study
- Reference to materials given in the test

State
- Write in brief detail by a short statement or a single word

Study
- Examine closely, pay special attention to, look carefully and interpret

Suggest
- Write down ideas on, or knowledge of a particular feature
- Propose or put forward ideas for consideration
- Give an explanation referring to the feature

Why
-Provide the reason or cause