Monday, September 5, 2011
HBL 24/5/11
2) Reflect on this:
How has/will human activities in the Amazon regions affect the Allomerus decemarticulatus ants?
Human has been destroying the habitat of the Allomerus decemarticulatus ants as a result from deforestation for urban development. This will make the ants go without a home and eventually die. Soon, it will become extinct. In addition, by cutting down all the trees, we are destroying the traps made by the ants and soon they will have nothing to eat and lead to death.
3) Answer the following questions:
a) From the extract, identify the different symbiotic relationships and cite the organisms involved. Clue: There are at least 3 types of relationship.
mutualism. The trees and the Allomerus decemarticulatus ants.
Predation. The insects flying around and the Allomerus decemarticulatus ants.
Competition. The trees fight for sunlight.
b) For each type of relationship you have identified in (a), name another example of a pair of organisms depicting that relationship in nature.
Mutualism- clown fish and sea anemone.
Predation- tiger and deer
Competition- lion and hyena
How has/will human activities in the Amazon regions affect the Allomerus decemarticulatus ants?
Human has been destroying the habitat of the Allomerus decemarticulatus ants as a result from deforestation for urban development. This will make the ants go without a home and eventually die. Soon, it will become extinct. In addition, by cutting down all the trees, we are destroying the traps made by the ants and soon they will have nothing to eat and lead to death.
3) Answer the following questions:
a) From the extract, identify the different symbiotic relationships and cite the organisms involved. Clue: There are at least 3 types of relationship.
mutualism. The trees and the Allomerus decemarticulatus ants.
Predation. The insects flying around and the Allomerus decemarticulatus ants.
Competition. The trees fight for sunlight.
b) For each type of relationship you have identified in (a), name another example of a pair of organisms depicting that relationship in nature.
Mutualism- clown fish and sea anemone.
Predation- tiger and deer
Competition- lion and hyena
Thursday, September 1, 2011
science fun facts
 | The fastest computer in the world is the CRAY Y-MP C90 supercomputer. It has two gigabytes of central memory and 16 parallel central processor units. |
| The heaviest human brain ever recorded weighed 5 lb. 1.1 oz. (2.3 kg.). |
| The deepest part of the ocean is 35,813 feet (10,916 meters) deep and occurs in the Mariana Trench in the Pacific Ocean. At that depth the pressure is 18,000 pounds (9172 kilograms) per square inch. |
| The largest cave in the world (the Sarawak Chamber in Malaysia) is 2,300 feet (701 meters) long, 980 feet (299 meters) wide, and more than 230 feet (70 meters) high. |
| The hottest planet in the solar system is Venus, with an estimated surface temperature of 864 F (462 C). |
| The ears of a cricket are located on the front legs, just below the knee. |
| The first electronic digital computer (called ENIAC - the Electronic Numerical Integrator and Calculator) was developed in 1946 and contained over 18,000 vacuum tubes. |
| The leg muscles of a locust are about 1000 times more powerful than an equal weight of human muscle. |
| The cosmos contains approximately 50,000,000,000 galaxies. |
| There are between 100,000,000,000 and 1,000,000,000,000 stars in a normal galaxy. |
| Sound travels about 4 times faster in water than in air. |
| Scientists have discovered that copper pollution of the atmosphere occurred about 2500 years ago. This was discovered by analyzing ice cores from Greenland. The pollution was attributed to the Romans who used copper for military purposes and to produce coins. |
| Hydrofluoric acid will dissolve glass. |
| In a full grown rye plant, the total length of roots may reach 380 miles (613 km). |
| In a full grown rye plant, the total length of fine root hairs may reach 6600 miles (10,645 km). |
| A large sunspot can last for about a week. |
| If you could throw a snowball fast enough, it would totally vaporize when it hit a brick wall. |
reflection for term 3
this term is a very fast one but at the same time a fun-filled and enriching one. Although we did not have many lab lessons where we do experiments, i learnt a lot of things during lessons in class. for example, light and ecology. Even though light have been taught in primary school, i have been introduced to a more in-dept knowledge of all those topics.
in term of test, i must say that i am both satisfied and unsatisfied. Satisfied because i managed to score a A1 for it and unsatisfied because i got a low A1 and is one of the lowest in class. I hope i can do well for my EOYs.
in term of test, i must say that i am both satisfied and unsatisfied. Satisfied because i managed to score a A1 for it and unsatisfied because i got a low A1 and is one of the lowest in class. I hope i can do well for my EOYs.
reflection for term 2
In term 2,we learned on how to balance chemical equations, acids,bases and salts and the human reproductive system. i feel that chemistry is the challenging one as i find it more difficult to understand the topic. although the human reproductive system has a lot to remember, chemistry requires us to remember and also apply our knowledge into it. this term, i only scored 24/40 for my test. this is far away from my targetted A1. i feel very disappointed as i did very badly for this test. although i had other commitments, i should not have neglected on the test. i hope that i can learn from my mistake and start revision earlier to as to be more well prepared for the test next time.
reflection of term 1
Although chemistry taught in term 1 was interesting, I found it challenging and difficult and did not clear my doubts when the test arrived, and thus did not do as well as I wanted. I feel that in the process of learning, one should not be shy and ask when in doubt of anything that he do not know so as to learn well. Most importantly, I feel that I should set a goal for myself, a target score so as to strive for better results. Apart from that, I should also work on my attitude and be more hardworking when it comes to memorizing notes. i hope that in term 2, i will learn from this lesson and pull up my socks and achieve better grades.
Sunday, August 28, 2011
online lesson
hi guys!!
this is an online lesson i did earlier in the year on harmless elements!
hope you guys enjoy it!
anthony
term 3 ace
hi guys!!
this is another powerpoint presentation for my ace in term 3!!
hope you guys enjoy it!!!
anthony
term 3 ace
hi guys!!
this is a powerpoint presentation for ace is term 3..
hope you guys enjoy it!
anthony
Sunday, August 14, 2011
Reflection on science experiences, laboratory sessions
The science experiments we conducted in the science lab were really interesting and helpful. Hands-on allowed me to understand the topic at hand better. I really enjoyed the experiments and I feel that we should have more of these experiments as we would really be able to understand the concept.
An example would be the testing of reflection and refraction. After conducting the experiment, I was finally able to see it ‘live’. As such, I understood the effect of the change of speed in going through different mediums, which results in refraction. We were also allowed to test for total internal reflection.
Another experiment was the concave and convex mirrors experiment. It allowed us to go closer and further away from both mirrors to see the image appearing in the mirror. As such, we would know the outcome image of ourselves and understand the concept better.
Saturday, August 13, 2011
reflection for term 2 sabatical ecology
When I was choosing my sabbatical for term 2, although I am the sporty type of person, nothing stands out more than ecology. Nothing else caught my attention other than ecology. This involves interesting activities and trips, and even includes a cool presentation by the seniors! This is an alternative fun way to learn science, and is neither boring nor mundane. As I was also learning about ecology in term 2, I decided that that will be my sabbatical for term 2. I wanted to learn more about that topic as the things being taught in class is very broad. I was determined to get into it. Fortunately, I got what I wanted.
Week 9 came quickly after that. It is time to attend this interesting sabbatical. On the first day, I was told to form groups of 5 to do activities together throughout the sabbatical. As a few of my friends also chose this sabbatical, I decided to form a group with them. We were also told that over the next few days, we will be going to places filled with biodiversity and nature like the Underwater World, Sungei Buloh and the Raffles Museum of Biodiversity. At this point I knew my decision is correct. This is the sabbatical that I have been looking out for all this while.
There is a fieldtrip that still remains vividly clear in my mind. It is none other than the Raffles Museum of Biodiversity. It was a rather small museum but filled with many ANIMALS! There are many animals that are being put on display. Those animals are not life ones, but dead ones. According to Mrs Tan, most animals are found in Singapore dead quite a long time ago. Some of these animals can’t be found in Singapore again today as urbanization and development has occurred since then. I was amazed of the size and the breed of animals that are being found. For example, there was a huge turtle that was about one meter wide. There was even a fish that is 3 meter long! I was amazed that such large animals could be found in Singapore in the past. There was a question that popped into my mind. How are the animals being preserved till date? According to Mrs Tan, these animals are being spread with arsenic, a poisonous chemical. It was so poisonous that we cannot even touch those animals!
My group and I had learnt a lot from this sabbatical, from ocean and mangrove ecosystems, to prehistoric museum organisms. There are many organism relationships that we had learn : commensalisms, predation, mutualism and parasitism . In parasitism, it is a situation where an organism benefits but the other party get is being harmed or in another word, which one organism benefits at the expense of an organism of a different species. Let me give you a real life example, a mosquito and a human. When a mosquito bites a human for blood, the mosquito benefits by getting what it wants. But the human will feel itchy after that and may even contract dengue fever. In this way, humans are being harmed. Through this sabbatical we identified several alternative relationships, like mutualism and more. I could remember the relationship on parasitism very clearly as it was it happens to us very often like the mosquito and human example.
Through this sabbatical, my love for mother nature grew. I began to appreciate what is around me, appreciate the wonders of nature. I began to love animals more. I learnt that the biodiversity in Singapore is fast disappearing. Animals are getting smaller in size and numbers, all the forest and swamps are being burned and reclaim for urbanization without a second thought for the rich biodiversity we have here in Singapore. It is like oil that is slowly disappearing day by day. Soon, the biodiversity in Singapore will vanish. As a Singaporean, I have the responsibility to stop all these and conserve what remains here in Singapore. All in all, this is a meaningful and enriching sabbatical with I truly enjoy myself and learn something precious at the same time.
Week 9 came quickly after that. It is time to attend this interesting sabbatical. On the first day, I was told to form groups of 5 to do activities together throughout the sabbatical. As a few of my friends also chose this sabbatical, I decided to form a group with them. We were also told that over the next few days, we will be going to places filled with biodiversity and nature like the Underwater World, Sungei Buloh and the Raffles Museum of Biodiversity. At this point I knew my decision is correct. This is the sabbatical that I have been looking out for all this while.
There is a fieldtrip that still remains vividly clear in my mind. It is none other than the Raffles Museum of Biodiversity. It was a rather small museum but filled with many ANIMALS! There are many animals that are being put on display. Those animals are not life ones, but dead ones. According to Mrs Tan, most animals are found in Singapore dead quite a long time ago. Some of these animals can’t be found in Singapore again today as urbanization and development has occurred since then. I was amazed of the size and the breed of animals that are being found. For example, there was a huge turtle that was about one meter wide. There was even a fish that is 3 meter long! I was amazed that such large animals could be found in Singapore in the past. There was a question that popped into my mind. How are the animals being preserved till date? According to Mrs Tan, these animals are being spread with arsenic, a poisonous chemical. It was so poisonous that we cannot even touch those animals!
My group and I had learnt a lot from this sabbatical, from ocean and mangrove ecosystems, to prehistoric museum organisms. There are many organism relationships that we had learn : commensalisms, predation, mutualism and parasitism . In parasitism, it is a situation where an organism benefits but the other party get is being harmed or in another word, which one organism benefits at the expense of an organism of a different species. Let me give you a real life example, a mosquito and a human. When a mosquito bites a human for blood, the mosquito benefits by getting what it wants. But the human will feel itchy after that and may even contract dengue fever. In this way, humans are being harmed. Through this sabbatical we identified several alternative relationships, like mutualism and more. I could remember the relationship on parasitism very clearly as it was it happens to us very often like the mosquito and human example.
Through this sabbatical, my love for mother nature grew. I began to appreciate what is around me, appreciate the wonders of nature. I began to love animals more. I learnt that the biodiversity in Singapore is fast disappearing. Animals are getting smaller in size and numbers, all the forest and swamps are being burned and reclaim for urbanization without a second thought for the rich biodiversity we have here in Singapore. It is like oil that is slowly disappearing day by day. Soon, the biodiversity in Singapore will vanish. As a Singaporean, I have the responsibility to stop all these and conserve what remains here in Singapore. All in all, this is a meaningful and enriching sabbatical with I truly enjoy myself and learn something precious at the same time.
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