EVSC 100 ACTUAL UPDATED Questions and CORRECT Answers
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Course
EVSC 100
Institution
EVSC 100
EVSC 100 ACTUAL UPDATED Questions
and CORRECT Answers
Environmental Science - CORRECT ANSWER- An interdisciplinary field that studies
the interactions between humans and the environment
Planetary Boundaries - CORRECT ANSWER- how humans and our planet are
interconnected
- A planetary bounda...
EVSC 100 ACTUAL UPDATED Questions
and CORRECT Answers
Environmental Science - CORRECT ANSWER- ✔✔An interdisciplinary field that studies
the interactions between humans and the environment
Planetary Boundaries - CORRECT 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? - CORRECT 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? - CORRECT ANSWER- ✔✔Crossing
these boundaries increases the risk of larger scale abrupt or irreversible environmental
changes
,What are 2 big planetary boundaries? - CORRECT ANSWER- ✔✔Biosphere integrity and
climate change
what planetary boundaries have been crossed? - CORRECT ANSWER- ✔✔1. Biosphere
integrity
2. Land system change
3. Fresh water use
4. Climate change
5. Novel entities
6. Biogeochemical flows
control variable of planetary boundaries - CORRECT 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 - CORRECT ANSWER- ✔✔biosphere, atmosphere, geosphere,
hydrosphere
biosphere - CORRECT 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 - CORRECT 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.
, geosphere - CORRECT ANSWER- ✔✔- this sphere is the solid Earth: the crust, the rock
beneath the crust, the outer core and the inner core. - The Geosphere provides the physical
land based habitat for humans, animals and plants (Biosphere).
- If you think rock, then you are in the realm of the Geosphere, from sand grains, to
mountains, to molten rock comprising the outer core of the Earth.
atmosphere - CORRECT ANSWER- ✔✔- this sphere contains all the air in Earth's system.
- It extends from less than 1 m below the planet's surface to more than 10,000 km above the
planet's surface.
- The upper portion of the atmosphere protects the organisms of the Biosphere from the sun's
ultraviolet radiation.
- It also absorbs and emits heat. When air temperature in the lower portion of this
sphere changes, weather occurs.
planetary boundaries are not.. - CORRECT ANSWER- ✔✔1. Equivalent to a global
threshold or tipping point (ex. It doesn't mean that the planet is going to die)
2. Even when a global or regional threshold in an earth system process is likely to exist, the
planetary boundary is not placed at the position of the biophysical threshold but rather
"upstream" of it- ie. well before reaching the threshold
Safety - CORRECT ANSWER- ✔✔First boundary, brings concern and awareness, ramped up
efforts
Risk - CORRECT ANSWER- ✔✔Second boundary, will bring major disruptions to the Earth
System (think IPCC Global Avg. Temp Target)
what is science? - CORRECT ANSWER- ✔✔1. Science is based on systematic observations
of natural phenomenon(a) in order to understand how things work.
2. What we learn from observations can never be proved as a truth. We can only verify or
falsify our understanding, and this is a continual process [it has no end].
3. How we learn should be done in a way so that further and future testing can occur, as well
as replication.
4. There is no one way to do science! It is very personal endeavor, and draws on the
creativity, courage, imagination, skill, work ethic and integrity of each scientist.
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