Catalyst: GSCE Science Review 2002 Volume 13 №01

GSCE Science Review. — 24 p.This issue of Catalyst includes the following articles:
Plastics: an Insoluble Problem
This article looks at plastics, their uses and what happens to them once they are discarded.
Hearing the World Around Us
Engineers use their understanding of sound waves and how they travel through their surroundings to develop highly realistic sound systems for films, music systems and computer games. The same ideas can help people with eyesight and hearing problems.
Where Have All the Skylarks Gone?
Living organisms can act as biological indicators of problems in the way we are managing our environment. Skylarks and other birds are disappearing from our farmland. How do scientists know that this has happened, why have they declined and what can be done to encourage them back?
Catalyst is a science magazine for students aged 14-19 years. Annual subscriptions to print copies of the magazine can be purchased from Mindsets.