7Square

Group 49 Group Name : 7Square
Group Members :
1) Poh Junhan 2) Winnie 3) See Siew Leng Reine 4) Jia Jing 5) Zhao Jie 6) Alvis Vu Tuan Duc
1.

Cloning is a process of creating the exact copy of an individual. On the other hand, breeding is the process of creating new individual by paring the right parents couple together. According to these definitions, breeding is actually a better process because the gene of life of the off-spring will be the improvement of the parents instead of being exactly the same like cloning.
Additionally, cell mutations can arise than the genetic cloning which give rise to genetic diseases in the clone.

2.

Pro:
1) the problem of famine will be solved immediately
2)GM corn could survive the drought

Con:
1)Potential risks of GMO product towards health are unknown yet, might be carcinogenic.
2) Native biodiversity is threatened
3) Pest can become more resistant.

However, the government should still accept it if not much more people will DIEEEEEE

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Group 49

Group 49 Group Name : Group 49
Group Members :
1) Poh Junhan 2) Winnie Jesslyn 3) See Siew Leng Reine 4)Phua Jia Jing 5) Goh Zhao Jie 6)Alvis Vu Tuan Duc
1.

Two ways in which one carbon atom can differ from another.
1)Different neutron number in nucleus
2) Different electron number ( ions of carbon )

Three ways in which all carbon atoms differ from all uranium atoms
1)Different neutron number
2) Different proton number
3) Different electron number

2.

14N : mass of this atom is 14u
– 7 neutrons
– 8 protons

15N : mass of this atom is 15u
– 8 neutrons
– 7 protons

3.

3a) 94 protons

3b) 93 Protons : Neptunium
94 Protons : Plutonium

3c) 86 protons

4.

A – Control Rod assembly
B – Cooling water out of the core
C – Control rods
D – Cooling water into the core
E – Fuel rods

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7sqr

Group 49 Group Name : 7sqr
Group Members :
1)VU TUAN DUC 2) SEE SIEW LENG REINE 3) WINNIE JESSLYN 4) POH JUNHAN 5) PHUA JIA JING 6) GOH ZHAO JIE
1.

A) Exothermic – Because heat energy is released during the process.
B)Endothermic – Water molecules absorb energy in order to change its state from liquid to gas.
C)Endothermic – Water molecules absorb energy in order to change its state from solid to liquid.

2.

Energy is taken in to break the bond for the reactant. Energy is released when the bond is formed in the product. An explosion requires large amounts of energy to be released. In order to produce a very exothermic reaction, the net energy is produced must be very high. Hence, the bond strength of the product must be a lot higher than that of the reactant.

3.

Temperature is the measurement of heat. Heat is the amount of energy. Higher temperature object will transfer energy to lower temperature object until both has the same amount of energy. Example, temperature of a cup of water and a pail of water could be both 25 degree. but obviously the pail of water has more heat because of its larger mass.

Another difference to note is that temperature has unit of Kelvin(K) while heat has a unit of joules(J).

4.

A) It has a knocking characteristics of 98% octane and 2% ethane.
B) No it does not

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