Carbon Cycle, Eco System, Food chains and communities YEAR 9 GCSE END OF TERM TEST

Carbon Cycle, Eco System, Food chains and communities YEAR 9 GCSE END OF TERM TEST

1. Carbon cycle

   • Everything is made of carbon
   • Recycled through various processes
     • Respiration
     • Combustion
     • Photosynthesis
   • Carbon Increase
     • Combustion
       • Slash/burn (cutting down and burning rainforests
       • Power Stations releasing CO2 into air
     • Respiration
       • Animals
       • Trees
   • Carbon Decrease
     • Photosynthesis
       • 6CO2 + 6H2O → C6H1206 + 6O2
     • Colder water holds more CO2
   • continuous cycle of carbon being released and taken back from the atmosphere
     • The exchange of carbon through the atmosphere

2. An ecosystem is the location (pond, desert)

   • an interacting group of various species in a common location
   • Biotic
     • lliving
   • Abiotic
     • Non-living

3. Food Chains

4. Competition is the struggle between different species for the same limited rescource

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