How C, N, and O Move 1
How C, N, and O Move 2
Populations 1
Populations 2
Differences between Developed and Undeveloped World
100
Where is the majority of Earth's Nitrogen? Is it usable to the living world?
In the atmosphere, no it is not usable.
100
What percentage of Earth's air is Nitrogen?
78%
100
What is the current population of Earth?
8 billion as of december 2023.
100
How are humans different from most other organism populations on the planet?
Human have only 1, maybe two offspring each birth.
Most organisms produce more offspring that are needed with the hope some reach maturity.
100
What is the population growth rate in developed countries?
At or near 0%
200
How do all living organisms, besides plants, get their nitrogen?
By eating other organisms.
200
How much energy is maintained from organism to another?
10%
200
What are two limiting resources for a Plant?
Water, sunlight, soil nutrients
200
What are two limiting resources for animals?
Food, water, shelter, reproductive sites
200
What is the difference in children's survival between the developed undeveloped world?
Parents in the developed world know their children will survive infancy while parents in undeveloped world do not have that guarantee.
300
What is the only usable form of nitrogen to the living world?
Nitrates, NO3-
300
Where does the 90% of energy that is lost when one organism eats another organism go?
It is used to maintain the levels of organization.
300
What are two examples of Density Dependant Factors?
Parasitism, disease, predation, competition for limiting resources.
300
What are two examples of density independent factors?
Human activity, unusual weather, natural disasters, seasonal changes.
300
What is the difference in birth control between the developed undeveloped world?
The undeveloped world has little to no access to birth control.
400
Put the following in order from 1-3:
____ Dead plants and animals and their wastes are recycled in the soil back to nitrates which can once again be sued by plants to strar tthe cycle over again.
____ Once nitrates are formed, they are taken in by plants and used to form nucleotides and amino acids for plant tissue.
____ Animals in turn get their nitrogen compounds by eating plants and other animals.
1. Once nitrates are formed, they are taken in by plants and used to form nucleotides and amino acids for plant tissue.
2. Animals in turn get their nitrogen compounds by eating plants and other animals
3. Dead plants and animals and their wastes are recycled in the soil back to nitrates which can once again be sued by plants to strar tthe cycle over again.
400
What are three strategies that farmers in Rusk county might use to keep their soils rich in nitrogen?
Rotate Crops, Spread Manure, Use Fertilizers, or just not plant certain fields certain years.
400
Fully explain of the two estimates for the max human carrying capacity on Earth.
2 Billion: max number of people while doing minimal environmental damage.
12 Billion: number of people ecologists think we will be at when we run out of fossil fuels.
400
What would a graph look like of a population that begins to grow at its biotic potential but then hits environmental resistance?
400
What is the difference in number of children in regards to economic success between the developed undeveloped world?
Parents in developed countries are not reliant on their children for economic success.
500
What are the three natural ways and one mademade way of Nitrogen Fixation?
Natural: Lightning, Bacteria that live in root nodules of legumes, and blue/green bacteria (algae)
500
Put the following in order from smallest to largest:
Organ system, tissue, organelle, atom, organism, organ, cell, compound/molecule
Atom, compound/molecule, organelle, cell, tissue, organ, organ system, organism.
500
What are four factors that determine a species biotic potential?
How often they reproduce, how many are born at a time, how long the females are fertile each cycle, how young the females are when they become fertile, how many fertility cycles in a females life, and limiting resources.
500
Describe the events that took place with Reindeer on St. Mathew's Island that led to ecologists understanding of carrying capacity.
In1944, the United States Coast Guard intruded 29 reindeer as an emergency food source for soldiers.
At first, the reindeer had no limiting factors on St. Mathew’s Island. There were no predators, an abundance of food, an no human interaction. Ecologists returned to St. Mathew’s Island to find roughly 6,000 reindeer in 1963.
However, eventually the Reindeer ran out of food due to a bad winter from 1963-64. When ecologists returned to St. Mathew’s Island in summer 1964, there were only around 50 reindeer left alive and literally thousands of bones scattered across the island.
Ecologists would continue to visit St. Mathew’s Island over the next few decades and see that the reindeer population would naturally rise and fall but eventually stabilized at around 1700 at any given time.
500
What is the difference in social status of children between the developed undeveloped world?
Many children are not a sign of high social status in developed countries but is in undeveloped countries.