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List some fossil fuels and their purpose?
Coal, oil and natural gases. They provide most of our needs (non renewable resource)
Explain the ozone layer?
A gas in the stratosphere (o3) because there are three oxygens. Ozone is poisonous
How can you prevent fossil fuel pollution?
Scrubbers, cyclone separators, bag house filters, catalytic converters and energy conservation
Explain what nuclear energy is and what it does?
Uses uranium fuel to create electricity - highly radioactive waste is produce (non renewable resource)
What are some alternative renewable resources?
Solar power, wind, hydroelectric, biomass and geothermal
Who was Erin Brockovich?
Worked and solved a case about the contamination of chromium six in the ground water
What is chromium six?
unstable compound formed by the addition of acidified hydrogen peroxide solutions to solutions of chromates, such as sodium chromate.
What are keystone species? Give examples.
Species who's role in an ecosystem is more important than their numbers suggest (sea otters, dung beetles and bats)
How are we disrupting the earth's gaseous nutrient cycles?
Carbon dioxide addition; burning fossil fuels and using fertilizers adds nitrogen oxides; adding SO2 from refining and fossil burning; and toxic metals
What is air pollution?
The presence of one or more chemicals in the atmosphere in quantities and duration that causes harm to humans, other forms of life and materials
What are primary pollutants?
Materials added to the troposphere from natural events (volcanoes) and human activities
What are secondary pollutants?
Pollutants formed when primary poll reacts with each other or the air to form new pollutants
What is photo chemical smog?
A mixture of primary and secondary pollutants formed under the influence of sunlight
What is NO2
Nitrogen dioxide - a yellow/brown gas with a choking odor. It can damage lungs, crops and trees
What is industrial smog?
Mixture of sulfur dioxide suspended droplets of sulfuric acid and other particles. Burning of coal and oil in power and heating.
What are some factors that influence photo chemical and industrial smog?
Temperature inversion and acid deposition
What is temperature inversion?
(thermal inversion) caused when a dense, cool layer of air becomes trapped beneath a layer of less dense war air
How can you reduce acid deposition?
Reduce energy use; switch from coal to natural gas; remove sulfur from coal; remove SO2 and nitrogen oxides from smoke gases; remove nitrogen oxides from motor vehicle exhaust
What is sick building syndrome?
A building is "sick" when at least 20% of its occupants suffer persistent symptoms that disappear when they go outside
What are the clean air acts?
Provided federal air pollution regulations (cost money to enforce, but saves more money in health and ecological benefits). Prevent not cleanup.
How can we reduce outdoor air pollution?
Electrostatic precipitator; bag house filter; cyclone separator; wet scrubber
What is biomass?
Combined dry weight of all organic matter contained in organisms for each tropic level
Describe the energy flow?
Sunglight - producers - herbivores - carnivores - decomposers (90% loss at each transfer)
Describe the biomass of the tropic levels?
3rd order consumers - 2nd consumers - 1st consumers - producers
What is gross primary productivity?
The rate at which an ecosystem's producers convert solar energy into chemical energy as biomass through photosynthesis
What is the new primary productivity?
(NPP) some of gross PP is used up by plants in respiration - what's left is NPP
Explain nitrogen cycle?
Most complex cycle, a global gaseous cycle involving Nitrogen converting bacteria and lightning
Explain the sulfur cycle?
Tied up in rocks and minerals SO2 comes from volcanoes and burning fossil fuels. SO2 mixes with oxygen in our air to form SO3 which in 1/3 of all sulfur in the air comes from human activity
List three ecosystem services?
Climate control; provide and renew air, water and soil; provides biodiversity
What is a limiting factor?
One factor that is more important than others in regulating population growth
What is the pioneer stage and what are some typical organisms?
First stage of succession (ex: lichen)
List characteristics of the climax community?
Large body size, few offspring and one generation per season
Distinguish primary and secondary succession?
Primary is the colonization of living organisms and secondary is regeneration
What is symbiosis?
Is a close relationship between organisms of different species. At least one of the organisms depends on this relationship to survive
What human activity has probably contributed to the most acidification of the lakes in the Adirondack region?
Burning fossil fuels that produce air pollutants containing sulfur and nitrogen
Which element is NOT recycled throughout an ecosystem by the processes of photosynthesis and respiration?
Define food energy
The amount of energy obtained from food that is available through cellular respiration
Define producer (give examples)
Autotrophic organisms that produce food for consumers (red maples, spider plants)
Give an example of a food chain.
(producer) seed ------> (primary consumer) sparrow ------> (secondary consumer) hawk
What happens to an ecosystem after a volcanic eruption or a forest fire?
-some plants whose roots have survived will sprout back up
-many plants whose seeds are already in the ground are activated after a fire and will sprout up soon after the fire, usually the next growing season
-woodier plants and trees also start growing soon after the fire, but grow at a slower rate
-after a few years, the burned forest thickens with woodier plants and sapling trees
-it may take 200 years to reach a fully mature stand again
What is Primary Succession?
The development of living things that occurs where no living things or soil exist
What is Secondary Succession?
A process started by an event that reduces an already established ecosystem
What happens as the pioneer species dies?
They add fertile nutrients to the soil and they also break up the rocks helping to create soil, so new organisms can populate the area
What is Ecology?
The study of the interactions of organisms with one another and with their environment
What are the Ecosystems? (give examples)
Smaller units that make up the biosphere. All living and non-living parts of the environment. (Pond, Garden)
What is Biotic? (give examples)
Living factors in an ecosystem (ducks, fish, turtles, frogs, insects, dragonflies, bacteria)
What is a Niche? (give an example)
Role or job of an organism in the ecosystem (a mushroom as a decomposer)
What are Herbivores? (give examples)
Animals that feed only on plants (grasshoppers, giraffes, cows, deers, rabbits, elephants)
What are Carnivores? (give examples)
Animals that feed on other animals and eat meat (shark, lion, tiger)
What are Predators? (give examples)
Carnivores that attack and kill prey (lions, sharks, pumas, eagles, bears, snakes)
What are Scavengers? (give examples)
Carnivores that feed on dead animals (vultures, hyenas, seagulls, rats, crows)
What is Commensalism? (give examples)
1 organism benefits and the other organism isn't harmed (shark and remora)
What are the effects of too much heat in the atmosphere?
Glaciers and ice caps melt and kill arctic animals
What is the ecosystem made up of?
plants, animals, bacteria, weather, temperature, rain, sunlight, water, rocks, minerals, terrain, and decomposers
How do humans alter ecosystems?
They create pollution by burning gasoline and get soot (powdery, black incomplete carbon material)
The science of ecology is best defined as the study of..?
the interactions of living organisms and their environment
The study of the interactions between organisms and their interrelationships with the physical environment is known as..?
What phrase can be used to best describe an ecosystem?
all the living organisms in a specific location
Which statement concerning an ecosystem is correct?
it involves interactions between biotic and abiotic factors
For a natural ecosystem to be self-sustaining, many essential chemical elements must be..?
cycled between organisms and the environment
What statement could best describe all stable ecosystems?
the populations of predators are dependent on the populations of their prey
In an ecosystem, the calcium compounds found in rocks are best described as..?
inorganic and abiotic
Which is an abiotic factor that functions as a limiting factor for the autotrophs in the ecosystem below?
Which is an abiotic factor that would affect ability of a species of tree to survive in a particular habitat?
availability of minerals in the soil
An abiotic factor component of the biosphere is represented by the..?
annual range of temperatures in a lake in New York State
Two abiotic factors that determine which terrestrial biome is found in a geographical area are..?
temperature and moisture
A particular species of freshwater mussel (a small clam-like animal) inhabits the shallow water of a large lake, where it lives and breeds. These mussels are referred to as..?
an aquatic biome
When a partially rotted log was turned over, fungi, termites, pill bugs, ants, slugs, and earthworms were found to be living in and around it. These organisms collectively represent a..?
Two different species of insect-eating birds feed and nest at different levels in the same evergreen tree. In this way they avoid..?
The widest variety of genetic material that can be used by humans for future agricultural or medical research would most likely be found in..?
an ecosystem having significant biodiversity
What is an element that is not recycled throughout an ecosystem by the processes of photosynthesis and respiration?
In an ecosystem, what happens to the atoms of certain chemical elements such as carbon, oxygen, and nitrogen?
They move into and out of living systems
Which two life functions of animals help maintain the water cycle by recycling water back into the environment?
synthesis and locomotion
Which processes are involved in the water cycle?
respiration, photosynthesis, evaporation, and condensation
In the nutritional relationship between heartworms and a dog, the heartworms benefit at the expense of the dog. This relationship is known as..?
Which type of relationship is illustrated by a protozoan causing the disease malaria in a human host?
The roots of a mistletoe plant absorb nutrients from living oak trees, causing some damage to the tissues of the trees is an example of what kind of symbiotic relationship?
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