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Just in case you are wondering what MESS is about,
it is a collaborated educational blog.

Find out more at the navigation "MESS"

This blog is officially opened in 21 August 2009




-10 Recent Posts-
P6 Science Chapter 6: Adaptation
P6 Science Chapter 5: The Web of Life
P6 Science Chapter 4: Environmental Impacts
P6 Science Chapter 3: Forces
P6 Science Chapter 2: Forces of Energy & Conversion
P5 Chapter 7: Forces & Work Done
P5 Science Chapter 6: Electricity
P5 Science Chapter 4: Reproduction in Plants
Primary 5 Science Chapter 2 :Cells
P5 Science Chapter 1 :The Solar System


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-Rewind-


Thursday, August 27, 2009
P6 Science Chapter 7: Man & His Environments @ 8:16 PM

P6 Science Chapter 7: Man & His Environments

Harmful effects:
1) Deforestation
  • kills animals and plants licing in the forest
  • Air pollution
  • Global Warming
  • Water Pollution

2) CFCs deplete the ozone layer

Helpful effects:

1) Biotechnology

2) genetic selection & engineering

3) Telecommunications - Sending signals, Weather forecasting, Navigations

Positive effects: affects our environment in a helpful manner

-Modern Technology to grow crops that are more nutritious & pest-free

-Invention of Man-made materials like alloys

~Metals are not used in their pure forms as they are too soft

-Plastics are chemicals obtained from petroleum.

~They can be flexible, transparent and/or they withstand high temperature

-Ceramics = Clay + other substances from ground

Negative effects: affects our environment in a harmful manner

-Deforestation: Loss of living things, Soil Erosion, Global Warming

~Soil Erosion: Soil is directly exposed to rain & wind & ground becomes hard & useless

~Global Warming: Carbon Dioxide increase(greenhouse gases) ,Earth temperature increase.




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