Grp1_Resi

Group 1: Constance Ng, Lee Teng-ya, Theodore, Jeremy Xiao, Filbert Phang

Erm, I think this is the final powerpoint. Can you guys please go to the google docs and choose which part you want to present? Thank you! ~Teng-ya

Topic: =Nanotechnology =

Some essential guiding questions:

 * ===Why should man bear responsibility towards the environment from which he draws his resources?===
 * ===Is technology good or bad in itself?===

= WE ARE NOW WORKING ON [|GOOGLE DOCS]. = = Next online meeting: Thu 14 Jun 8pm. Please try to be there! =

Hi Group 1, Please upload your end-product by this week so that you can present next week when school re-opens. I need to take a look at it first. Thanks, Mrs Lam

=__//**Man and his Environment Activity 2: **//__= True/False Statements: Ans: Reasons:
 * 1) Increasing solar input through the ozone hole increases global temperature
 * 2) Greenhouse gases retain heat by preventing convection and trapping warm air inside
 * 3) Hole in the ozone layer will cause glaciers in the poles to melt
 * 1) False
 * 2) True
 * 3) False
 * 1) An ozone hole is caused when CFCs break the bonds of the ozone layer which will absorb ultra-violet rays from the sun and prevent them from reaching the Earth. However, when CFCs, found in aerosol cans, break the bonds of the ozone layer, less ultra-violet rays will be absorbed, and more ultra-violet rays will penetrate through the layer and reach the Earth. As CFCs can stay around for a decade, and more people are releasing them into the air, an ozone hole is caused. However, the increase in solar input through the ozone hole does not cause an increase in global temperature, as ultra-violet radiation represents less than 1% of the energy from the sun. Global warming, is caused by human activities, eg deforestation, releasing greenhouse gases like carbon dioxide which will spread around earth like a blanket and trap heat. Thus, the statement is false.
 * 2) Greenhouse gases act as a blanket which spreads around the earth. They trap heat from the sun and reflect it back to the Earth. They also do not allow for heat transfer, as their state of matter is gas, and they are insulators of heat. Thus, the statement is true.
 * 3) Again, the ultra-violet radiation represents less than 1% of the energy from the sun, it does not contribute to the increase of global temperature. That is caused by human activities such as deforestation which gives out greenhouse gases, resulting in more heat trapped in Earth's atmosphere, thus causing glaciers in the poles to melt. Thus, the statement is false.

~Teng-ya (guys, pls edit! thx :)) PS. Our [|Links]