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EVSC 100 Exam Study Guide Solutions Environmental Science - ANSWER-An interdisciplinary field that studies the interactions between humans and the environment Planetary Boundaries - ANSWER-how humans and our planet are interconnected - A planetary boundary is an indicator, shows us general targ...

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  • November 4, 2024
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Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024




EVSC 100 Exam Study Guide Solutions


Environmental Science - ANSWER✔✔-An interdisciplinary field that studies the interactions between

humans and the environment


Planetary Boundaries - ANSWER✔✔-how humans and our planet are interconnected




- A planetary boundary is an indicator, shows us general targets that must not be exceeded as it risks

causing abrupt environmental changes


- Science based levels of human disturbance of the earth system beyond which functioning of the system

may be substantially changed


Why are planetary boundaries important? - ANSWER✔✔-· processes that regulate the stability and

resilience of the earth system.


· Quantitive planetary boundaries within which humanity can continue to develop and thrive.


· Planetary boundaries are framework for expressing the resilience of earth as a system


What is the danger of crossing a planetary boundary? - ANSWER✔✔-Crossing these boundaries

increases the risk of larger scale abrupt or irreversible environmental changes




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, Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024




9 planetary boundaries - ANSWER✔✔-1. climate change


2. novel entities


3. stratospheric ozone depletion


4. atmospheric aerosol loading


5. ocean acidification


6. biogeochemical flows


7. freshwater use


8. land-system change


9. biosphere integrity


What are 2 big planetary boundaries? - ANSWER✔✔-Biosphere integrity and climate change


what planetary boundaries have been crossed? - ANSWER✔✔-1. Biosphere integrity


2. Land system change


3. Fresh water use


4. Climate change


5. Novel entities



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, Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024




6. Biogeochemical flows


control variable of planetary boundaries - ANSWER✔✔-the measure of where that system sits in the

boundary (high risk or safe zone) and health of each earth system (red zone is definite high risk- ex.

Climate change) (safe zone is not as big of a concern).


The earth system - ANSWER✔✔-biosphere, atmosphere, geosphere, hydrosphere


biosphere - ANSWER✔✔-- this sphere contains all the living things on Earth: including all of the

microorganisms, plants, and animals of Earth.


- Within the Biosphere, living things form ecological communities based on the physical surroundings of

an area.


- These communities are referred to as biomes.


hydrosphere - ANSWER✔✔-- this sphere is the solid, liquid and gaseous forms of all water on Earth (salty

and fresh): the water in rivers and lakes, oceans and inland seas, glaciers and ice caps (Cryosphere), in

the atmosphere as water vapor (Atmosphere).


- Life as we understand it depends on the availability of water, and consequently the Hydrosphere is

interconnected with the Biosphere.


- Turns out the Hydrosphere is connected to all three of the other spheres.




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