HSC Earth and Environmental Science study guide
HSC Earth and Environmental Science · Work through your exam, one topic at a time.
The Higher School Certificate Earth and Environmental Science course is a senior secondary science subject in New South Wales, typically taken in Years 11 and 12. It suits students who want to understand how the geosphere, atmosphere, hydrosphere and biosphere interact, and who are interested in resource use, environmental management and the science behind sustainability decisions. The HSC Earth and Environmental Science study guide has 6 sections and about 1,875 words.
01Earth's Systems and Processes
Earth science treats the planet as four interacting spheres: geosphere (rock, mantle, core), atmosphere , hydrosphere (including cryosphere) and biosphere . Energy from the Sun and from Earth's internal heat drives transfers of matter and energy between them.
331 words, about 2 min02The Earth's Crust and Resources
Understand the distinction between a mineral (naturally occurring, inorganic, definite composition, ordered atomic structure) and a rock (aggregate of minerals). Know the three rock classes and their formation pathways, and how the rock cycle links them through melting, cooling, weathering, burial and metamorphism.
329 words, about 2 min03The Earth's Atmosphere and Hydrosphere
Know the layered structure (troposphere, stratosphere, mesosphere, thermosphere) and why temperature trends reverse with altitude - ozone absorption in the stratosphere, for example. Understand the greenhouse effect as selective absorption and re-emission of longwave radiation by gases with molecular vibration modes (CO2, H2O, CH4, N2O); it is a natural process, and the issue is its enhancement.
308 words, about 2 min04The Earth's Biosphere and Ecosystems
Understand biotic and abiotic components , producers, consumers, decomposers, trophic levels and food webs. Energy flows one way and is lost at each transfer (roughly 10% to the next level), while matter cycles.
292 words, about 1 min05Environmental Issues and Management
Strong answers describe the issue , the causes (natural and anthropogenic), the impacts at local to global scales, and management strategies with evaluation of effectiveness and limitations. Link issues to the spheres and cycles studied earlier.
302 words, about 2 min06Skills, Data Analysis and Fieldwork
Candidates must design investigations, identify variables (independent, dependent, controlled), write testable hypotheses, assess reliability and validity, and distinguish accuracy from precision. Know how to select equipment, sample representatively and reduce bias.
313 words, about 2 min