GROUP 6 :

YVONNE STEPHANIE A/P PATINADAN (M20112001684)

OOI SIEW FONG (M20121000104)

SALASIYAS BINTI MAT KILA (M20112001398)

PRECILLA A/P ROVAT @ ROBERT (M20131000662)

ARCHUNA A/P SUBRAMANIAM (M20131000658) 

LECTURER: PROFESOR DR. SOPIA BINTI MD YASSIN

GREENHOUSE EFFECT

GET THE BOATS

Scientific Concept

Greenhouse effect has been widely used to describe the trapping of excess heat by the

rising concentration of greenhouse gases (CO2, methane, water vapour) in the atmosphere.

One of the major greenhouse gases, CO2, strongly absorbs infrared radiation and does not

allow much of it to escape into space.

This causes the temperature of the earth to rise, which results in global warming

Reference : http://www.nps.gov/goga/naturescience/images/Greenhouse-effect.jpg

Scientific Concept

ENGAGE

Situation A Situation B

The picture in situation A depicts the condition of an Artic sea ice in 1979. The

picture in situation B depicts the condition of the same Artic sea ice in 1997. Explain

why this had happened.

Procedure

Prepare 2 conical flasks (A & B)

Put in 35 g of baking powder into each conical

flask

Place the temperature probes into each conical

flask

Add 65 ml of water into conical flask A and 65 ml

vinegar into conical flask B

Seal the conical flask immediately with a rubber

cork and swirl the solution

Once the temperature is stabilized, switch on the

bulb

Start the data logger and record the temperature

for 10 min

EMPOWER

Planning and Doing Experiment

Baking powder

Retort stand

Temperature probe

Rubber cork

Results

Time (s)Temperature (° C)

Run 1 Run 20 25.1277 25.3933

10 25.4948 25.754020 25.8265 26.115930 26.1272 26.423440 26.4073 26.769950 26.6240 27.092260 26.8348 27.322770 27.0353 27.606080 27.2270 27.778090 27.4009 28.0749

100 27.5896 28.2778110 27.7312 28.3706120 27.9228 28.5980130 28.0982 28.8162140 28.2530 29.0282150 28.3842 29.2543160 28.5204 29.4431170 28.6511 29.5586180 28.7631 29.6344190 28.9135 29.8461200 29.0334 29.9298210 29.1611 30.0924220 29.2879 30.2663230 29.4088 30.3300240 29.5150 29.8304250 29.6211 30.6394260 29.7557 30.8078270 29.8599 30.7650280 29.9749 30.9793290 30.1017 31.0767300 30.2226 31.1775

Time (s)Temperature (° C)

Run 1 Run 2310 30.3081 31.2862320 30.4113 31.3337330 30.5145 31.5220340 30.6177 31.6240350 30.7371 31.6688360 30.8594 31.9122370 30.9641 32.0165380 31.0511 31.8351390 31.1248 32.0096400 31.2074 32.1631410 31.3047 32.3326420 31.3902 32.4431430 31.4963 32.5634440 31.5651 32.6116450 31.6599 32.7083460 31.7469 32.8342470 31.8555 33.0632480 31.9386 33.0677490 32.0275 33.2767500 32.1450 32.9296510 32.2305 33.3657520 32.3101 33.4967530 32.4015 33.5762540 32.4870 33.6393550 32.5828 33.7472560 32.6639 33.8450570 32.7568 33.9972580 32.8408 34.0931590 32.9307 34.1230600 33.0177 34.0571

With vinegar

With waterTemperature

(°C)

Time (s)

Discussions

Name the gas that is produced in conical flask B

What is the purpose of using bulbs in this experiment?

Based on the graph, which conical flask has a higher rate of temperature increase?1

2

3Suggest a simple chemical test that can be used to confirm the presence of the gas in conical flask

B

Why is there a difference in the rate of temperature increase in both of the conical flasks?

4

5

ENHANCE

One of the most affected elements of global warming is our sea. In your opinion, how do

you think global warming could adversely affect the sea level?

UNIQUE FEATURES OF THIS ACTIVITY

A small change in the temperature can be detected easily and measured

accurately by using the temperature probe.

Two graphs can be plotted simultaneously with ease to have a clearer picture of

the temperature increase in the conical flasks.

Tables can be generated easily and precisely for each run by the software

according to the output of the experiment.

Students’ interest in practical work could be stimulated

REFERENCES

http://www.nps.gov/goga/naturescience/images/Greenhouse-effect.jpg

http://www.clean-air-kids.org.uk/globalwarming.html

http://www.nps.gov/goga/naturescience/climate-change-causes.htm

http://www.climatechange.gov.au/greenhouse-effect