Outline
Outline the difference between greenhouse effect and ENHANCED greenhouse effect.
Greenhouse effect is the normal/natural process that warms the Earth (trapping heat)... Enhanced greenhouse effect is caused by human activity, and contributes to global warming.
Define the term anthropogenic.
Caused or influenced by humans.
Discuss the use of mesocosms in studying ecosystems.
Models real ecosystems, controlled variables to observe stability and sustainability.
State one greenhouse gas other than CO2
Water vapor, methane, ozone, nitrous oxide
Which human activity contributes most to the greenhouse effect?
A) Using Solar Panels
B) Building dams
C) Burning fossil fuels
D) Reforestation
C) Burning fossil fuels
Outline how the use of fertilizers can lead to changes in ecosystems.
As fertilizers slide off into bodies of waters, eutrophication occurs leading to algal blooms... algae blocks the sun and reduces oxygen... leading to the death of aquatic organisms (loss of biodiversity).
Define the term Mesocosm.
A self-contained system that provides an environment for organisms.
Discuss a disadvantage of using a mesocosm as a model.
It models to some extent, but it can't be exactly manipulated to the environment being studied.. (validity)
State one effect of climate change (effects an ecosystem)
Deforestation, etc
Which of the following would most likely decrease the CO2 in the atmosphere?
a) Driving
b) Planting trees in deforested areas
c) Urbanization
b) Planting trees in deforested areas
Outline how deforestation contributes to climate change.
Trees contain CO2 , when there is a loss of tress... there's an increment of CO2... more CO2 enhances the greenhouse effect adding to global warming
Define the term Keystone Species.
A species critical to the survival of other species in the system.
Discuss the role of human activity in the carbon cycle
Must include either fossil fuel combustion, deforestation, CO2 levels rising.
State the role of Keystone Species in an ecosystem.
Maintain stability, health, biodiversity..
What is the main cause of Ocean Acidification?
a) The release of sulfur gases from volcanoes
b) Increased global temperatures causing coral bleaching
c) The absorption of excess CO2 by ocean.. forming carbonic acid
c) The absorption of excess CO2 by ocean.. forming carbonic acid
Outline the process of biomagnification.
Primary producers consume a small amount... then primary consumers ingest more by eating multiple producers...accumulation... getting towards the higher predators.
Define the term Biomagnification.
The accumulation of pollutants as it moves up in the food chain.
Discuss the cause and effect of mercury biomagnification in an ecosystem.
If Mercury were to begin at the very bottom, the fish can consume it, the fish are consumed by other species, including humans. In the case of a pregnant woman, she could not digest fish w/ Mercury because it can leave side effects on her baby/cause a death.
State a process that increases CO2 to the atmosphere
Respiration, combustion, decomposition.
Which of the following describe the relationship between deforestation and climate change?
a) They both result in a positive feedback loop only
b) They don't have a correlation
c) They both result in a positive feedback loop and sometimes negative feedback loop
c) They both result in a positive feedback loop and sometimes negative feedback loop
Outline an example of a keystone species in an ecosystem.
Wolf and Elk
Define the term Eutrophication.
The natural/artificial addition of nitrates & phosphates to water.
Discuss the causes and effects of Eutrophication (one cause & one effect)
Cause: Fertilizers, etc.
Effect: Oxygen reduction
State the process by which CO2 is removed from the atmosphere by plants.
Photosynthesis!
What is the correct definition of Acidification?
a) An increase in the pH level of a liquid/substance, increasing its acidity.
b) A decrease in the pH level of a liquid substance, increasing its acidity.
c) An increase in the pH level of a liquid/substance, decreasing its acidity
d) A decrease in the pH level of a liquid/substance, decreasing its acidity.
b) A decrease in the pH level of a liquid substance, increasing its acidity.