Mr Caleb Chua
Chan Hui Mui
Tan Shu Qin
Pui Pang Ping
Penny Tok
Wu Jiawen
Hillgrovians
Secondary 3
Weather Studies Project
150606 - 9 AM, outside staffroom
160606 -
170606 -
180606 -
190606 -
200606 -
210606 -
220606 - 9 AM, Macdoanlds
230606 -
240606 -
250606 -
260606 -
270606 -
280606 -
290606 - 3 o'clock, IT resource room
300606 -
010706 -
020706 -
030706 -
040706 -
050706 - Set up exhibition - concord
060706 - Technical run-through
070706 - 7 AM - 5 PM, concord primary
080706 - 10 AM, concord primary
090706 -
100706 -
110706 -
120706 -
130706 -
| School's soil |
| Date |
Color |
Texure |
Moisture |
| 06/01/06 |
Light Brown |
Coarse |
Little |
| 13/01/06 |
Brown |
Coarse |
Yes |
| 20/01/06 |
Light Brown |
Coarse |
Little |
| 27/01/06 |
Brown |
Coarse |
No |
| 03/02/06 |
Yellowish Brown |
Fine |
Yes |
| 10/02/06 |
Dark Brown |
Fine |
Yes |
| 17/02/06 |
Dark Brown |
Coarse |
A lot |
| 24/02/06 |
Light Brown |
Fine |
Little |
| 03/03/06 |
Light Brown |
Coarse |
No |
| 10/03/06 |
Brown |
Coarse |
No |
| Block 187's soil |
| Date |
Color |
Texure |
Moisture |
| 03/02/06 |
Pale Brown |
Fine |
Yes |
| 10/02/06 |
Brown |
Coarse |
Yes |
| 17/02/06 |
Brown |
Coarse |
Yes |
| 24/02/06 |
Greenish Brown |
Coarse |
No |
| 03/03/06 |
Greenish Brown |
Coarse |
No |
| 10/03/06 |
Greenish Brown |
Coarse |
No |
| Block 217's soil |
| Date |
Color |
Texure |
Moisture |
| 03/02/06 |
Blackish Brown |
Fine |
No |
| 10/02/06 |
Blackish Brown |
Coarse |
Yes |
| 17/02/06 |
Blackish Brown |
Coarse |
Yes |
| 24/02/06 |
Blackish Brown |
Coarse |
No |
| 03/03/06 |
Blackish Brown |
Coarse |
No |
| 10/03/06 |
Blackish Brown |
Fine |
Yes |
| Block 426's soil |
| Date |
Color |
Texure |
Moisture |
| 03/02/06 |
Brown |
Fine |
Little |
| 10/02/06 |
Brown |
Coarse |
Yes |
| 17/02/06 |
Brown |
Fine |
Little |
| 24/02/06 |
Brown |
Fine |
No |
| 03/03/06 |
Brown |
Fine |
No |
| 10/03/06 |
Brown |
Fine |
No |
| Date |
Avg. Temp |
Avg. Rainfall |
Wind Direction |
| 31/12-06/01 |
26.23 |
20.17 |
WNW |
| 07/01-13/01 |
25.59 |
37.7 |
NE |
| 14/01-20/01 |
27.26 |
4.74 |
WNW |
| 21/01-27/01 |
27.46 |
3.91 |
NE |
| 28/01-03/02 |
28.21 |
0.26 |
NE |
| 04/02-10/02 |
27.11 |
12.00 |
NE |
| 11/02-17/02 |
27.84 |
2.66 |
NE |
| 18/02-24/02 |
28.03 |
4.86 |
NE |
| 25/02-03/03 |
28.71 |
3.11 |
NE |
| 04/03-10/03 |
28.59 |
1.31 |
NE |
pH meter''s result
| Date |
School |
Block 187 |
Block 217 |
Block 426 |
| 03/02/06 |
4.46 |
6.24 |
6.74 |
7.62 |
| 10/02/06 |
4.56 |
5.61 |
5.47 |
8.05 |
| 17/02/06 |
5.53 |
5.61 |
6.18 |
7.90 |
| 24/02/06 |
4.46 |
6.21 |
6.50 |
8.74 |
| 03/03/06 |
4.53 |
6.80 |
6.30 |
8.68 |
| 10/03/06 |
5.56 |
6.34 |
7.08 |
8.45 |
|
| Date |
School |
Blk 187 |
Blk 217 |
| 06/01/06 |
Light Brown |
Coarse |
Little |
| 13/01/06 |
Brown |
Coarse |
Yes |
| 20/01/06 |
Light Brown |
Coarse |
Little |
| 27/01/06 |
Brown |
Coarse |
No |
| 03/02/06 |
Yellowish Brown |
Fine |
Yes |
| 10/02/06 |
Dark Brown |
Fine |
Yes |
| 17/02/06 |
Dark Brown |
Coarse |
A lot |
| 24/02/06 |
Light Brown |
Fine |
Little |
| 03/03/06 |
Light Brown |
Coarse |
No |
| 10/03/06 |
Brown |
Coarse |
No |
Chemicals can be acidic, neutral or basic depending on how many hydrogen ions they have.
Hydrogen ions are really just protons, a small particle that has a positive charge.
Scientists can find out whether a chemical is acidic, neutral or basic by testing its pH.
They use a special paper, called litmus paper, to do the pH test.
MORE FACTS
Acid solutions have a pH of less than 7 (and turns blue litmus paper red)
A neutral has a pH of 7.
Basic solutions has a pH more than 7 (and turns red litmus blue)
Do you know what pH stands for?
pH means power of hydrogen. Therefore, using litmus paper gives an idea of how much hydrogen or protons is in a solution.
What is an acid?
An acid is a chemical that has plenty of protons in solution.
Protons have a positive charge this is what makes a solution acidic solution.
Most acid chemicals have a sour taste. In fact, the word "acid" comes from the Latin word acidus which means "sour".
Examples of acids are: lemon juice and vinegar.
What is an alkali?
An alkali the opposite of an acid. It is a chemical that does not have a lot of protons in a solution.
Instead, a basic solution which has the ability to accept plenty of protons.
An alkalis is a base that can dissolve in water.
Examples of alkali are: toothpaste and household cleaners
Testing for pH values
Paper
1. Red Litmus paper
2. Blue Litmus paper
3. Universal Indicator
Solutions
4. Phenolphthaein solution
5. Methyl Orange (pH 2.9-4.6)
6. Bromothymol blue (pH 6.0(yellow) to pH 7.6(blue)
Credits
www.cogltd.com
1. Wash apparatus with distilled water.
2. Put soil into beaker.
3. Add distilled water into beaker and stir.
4. Placed the folded filter paper on top of a new beaker.
5. Pour the mixture into the filtered paper.
6. Wait for mixture to be filtered.
7. Use a dropper to place various test solutions and paper into six different test tubes.
8. Use another dropper to place filtrate into the six test tubes.
9. Use tweezer to take tested paper out of the test tube to place in zip lock bag
10. Take pictures of tested solution.
[Soon, soon, soon]
School
Block 187
Block 217
Block 426
Tuas area
Jurong Island
Dirt on soil
Difference between dirt and soil
Soil pH
October 2005
November 2005
December 2005
January 2006
February 2006
March 2006
April 2006
May 2006
June 2006
July 2006
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or alternatively,
f4_chanhuimui@hotmail.com,
tanshuqin@hotmail.com,
classicjw@hotmail.com,
sophisticated-p@hotmail.com.
p.s please tag to inform us if you e-mailed.
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people have came, since 120206
Saturday, November 12, 2005
Group 2 performance:
Today after the meeting, We started off with write-up for the topics that we are suppose to do. Thinking that Mr Chua will be leaving at 12noon, we went to continue with making the instruments.
We started off with continue making the wind vane. Hui Mui continued with sanding the wood. However, when Mr Chua took a photo, there was a blackout. It was not Mr Chua's fault. It was there was something wrong with the machine. After which, Hui Mui went to help Shu Qin with cutting of plastics for the arrow. When finish cutting the plastic, we started filing and sanding. Mr Chua found some recycled materials that can be used. We also had the base for the wind vane done. We must really say a BIG thank you to Mr Chua for helping us coming out with ideas for the base.
At 12, Mr Chua wanted to leave school so we had to leave the D&T room. We went to the library but the librarian went out for lunch. We went to study corner to do our stuffs. Pang Ping and Hui Mui went for lunch. Shu Qin wanted to do her stuffs. When Pang Ping and Hui mui came back from lunch, Shu Qin told us what to do.
At 1+, we called it a day.
Group 2 will be meeting again on Monday at 10am.
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