Ecosystems
What is the term for a balance in an ecosystem?
Equilibrium
What is the niche of humans: producer, consumer, or decomposer?
Consumer
Which process in the carbon cycle is responsible for putting large amounts of carbon dioxide in the atmosphere by the burning of fossil fuels?
Combustion
The first producers to start growing in a new ecosystem (mosses, lichens, grasses) are called ______________.
Pioneer Organisms
True or False: Exactly 10% of the energy gets transferred from one trophic level to the next.
False, it is about 10%
What term can be used to describe the cane toads, which were brought to Australia from South America?
Invasive Species
Would a decomposer be considered an autotroph or a heterotroph?
Heterotroph
Which process of the carbon cycle is responsible for taking carbon dioxide out of the atmosphere and storing it into organic matter, like glucose?
Photosynthesis
The final stage of succession, the most complex form of the ecosystem, is referred to as the _______________.
Climax community
Identify one example of a renewable resource.
Solar / Hydro / Wind / Biofuel
An organism is 2 steps away from the producers in a food chain. What type of consumer is it?
Secondary Consumer
Which niche tends to have the most energy in an ecosystem: producer, consumer, or decomposer?
Producer
Besides carbon dioxide, identify another pollutant that can act as a greenhouse gas.
Methane, Water Vapor, Sulfur Dioxide, etc.
Identify one destructive event that would result in primary succession.
Volcanic eruption / Retreating Glacier / Emerging Island
True or False: The greenhouse effect is necessary for life to exist on Earth.
True
What does an omnivore look like in a food web?
It will have an arrow coming from a producer and an arrow coming from a consumer?
In percent, how much energy from the primary producers eventually makes it to the tertiary consumers in an ecosystem? (Remember, the bottom level starts at 100%)
0.1%
How does deforestation add to the greenhouse effect?
Removing photosynthesis causes CO2 to build up
Identify one destructive event that would result in secondary succession.
Forest Fire / Flood / Deforestation
If the sun is not shown in a food web, how can you identify the producers in the web?
They will not have any arrows going to them.
Krill are tiny crustaceans that live in marine ecosystems. They are a major food source for most animals in the ecosystem. Without them, many species would die out. What term is used to describe krill?
Keystone Species
Bison get their energy from eating grass. If the grass have 4500 kcal of energy, how much energy (in kcal) from the grass gets lost to the environment?
4050 kcal (90%)
Greenhouse gases most directly affect which variable: Hin, Hout, or T?
Hout
Include both blanks: Primary succession takes _______ time than secondary succession because secondary succession starts out with __________ and primary succession does not.
More / Soil
Which type of observations are most valuable when providing evidence in a CER?
Quantitative Observations (numbers and measurements)