For over 200 million years Crocodilians have roamed the earth as apex predators. They are a ferocious family of reptiles that has stood the test of time and become one of the most successful hunters on the planet. These ancient animals are beautiful, powerful, and deadly. The often veracious attitude of the species in the Crocodilian family, and the strong fear that humans have towards them, has led to an aggressive relationship between man and the beast. Particularly in the Southeastern United States, humans and the American Alligator, Alligator Mississippiensis, have had a long and harsh relationship. In Florida, the American Alligator (also called a gator) has gone from plentiful bounties, to nearly becoming extinct, and then back to the healthy population that it is at today of about a million. The story of the American Alligator is one that is full of both tragedy and success. The alligator habitat consists of primarily freshwater ecosystems, which includes wetlands, lakes, and ponds. In the wetland and shallow lake and pond ecosystems the alligator is considered a keystone species. During time of drought, gators dig what are called “gator holes”. These holes, usually six to seven yards across and several feet deep, hold water in times of drought. While other parts of the marsh and swamps are dried up, these areas swarm with a high diversity of organisms attempting to utilize the last bits of water left (Whitney 2004). Because crocodilians are cold blooded the range of alligator range is limited to lower latitudes. The furthest north the American alligator is found is along the North and South Carolina coast. The furthest west Gators can be found is in eastern parts of Texas, especially along the Gulf of México (Toops 1979). The diet of an adult alligator is just about anything they can get. Their main technique to capture prey is to remain mostly submerged under the water’s surface and try to slowly creep up on prey either in the water or at the water’s edge. When in place they launch themselves forward. Alligators may seem sluggish most of the time but on land they can run up to 30 miles per hour for short distances, and in the water they use their huge and powerful tales to easily and graceful push themselves through the water. After getting the prey close enough, the gator will bite down with 3,000 pounds of pressure per square inch, one of the strongest bites in the world (Crawford 1992). Prey of the alligator can include fish, birds, turtles, snakes, mammals, and amphibians. The hatchlings tend to prey on invertebrates, insects, larvae, snails, spiders, worms, and other small prey (Science Daily). Gators are able to mate and reproduce at about 8 to 13 years of age. Alligators find a mate by doing what is called bellowing. They make a sure sound by making a vibration in its throat. This sound attracts potential mates to the area (U.S Fish and Wildlife Service). The dominate male in the area is usually the one that gets to mate with the female. After a few days of courtship, usually just consisting of the pair remaining close to one another, copulation takes place. The actual mating season occurs from mid-April through May. Two month after courtship the female will make a nest on a high bank, out of waters reach, usually consisting of saw grass and cattails. Around 35 eggs are laid in early June and hatch usually around mid-August when water levels are normally the highest and food is plentiful. Females will protect the nest during incubation and protect the hatchlings, after which the babies will usually stay with the mother for about a year (Troops 1979). When European settlers’ first start to try to live in in the mid to late 1800’s Florida, the alligators were amazingly abundant. There were actually so many that they were considered a nuisance and dangerous, so the settlers killed them to protect livestock and for sport. Shortly after this they began to value alligators for their hides
Professor Stephen J Ball, PhD, FRSA, AcSS
Karl Mannheim Professor of Sociology of Education
EPRU, Policy Studies,
Institute of Education
University of London
59 Gordon Square
tel: (44) (0)20-7612-6973
fax: (44) (0)20-7612-6819
Date of Birth: 21.1.1950
Academic Qualifications/Previous Appointments
1. Make playing area as and wide as possible.
2. Try to create dangerous situations in the opponent’s penalty area as quickly as possible.
3. Create opportunities to play passes forward to feet or run on to.
4. Take up good positions in front of the goal when the ball is crossed.
Attacking Tasks for the Defensive Line
1. No unnecessary loss of possession in your own half.
2. Circulate the ball quickly.
3. Try to switch play as quickly as possible.
4. Try to play ball forward as…
assistant were amazed when Gauss summed the integers from 1 to 100 instantly" (O'Connor and Robertson, 1996). Gauss built a magnetic observatory, completed in 1833 to observe magnetic declination. Gauss died in his sleep on February 23rd, 1855.
II. Statement of the Problem
The purpose of this experiment is to find out the relationship between the spacing of the magnets in a Gauss Rifle and the velocity of the last ball, and use it to determine the maximum velocity that can…
4.2 MultiSkills Session Plan
Risk assessment and personal details of the player are complete.
Cones and bibs
To teach them to quickly change direction both on the spot and whilst…
Lab Title: Mass of ball vs. Ability to float
Clear and concise question or problem you are seeking to answer using the correct format.
What is the effect of __(Manipulated Variable)__ on __(Responding Variable)__?
How does __(Manipulated Variable)__ effect __(Responding Variable)__?)
Question: How does the mass of the ball affect if it floats when dropped into a bin of room temperature water?
Hypothesis and Reasoning:…
Ball and Beam 1: Basics
BALL AND BEAM 1: Basics
Peter Wellstead: control systems principles.co.uk
ABSTRACT: This is one of a series of white papers on systems modelling, analysis and
control, prepared by Control Systems Principles.co.uk to give insights into important
principles and processes in control. In control systems there are a number of generic
systems and methods which are encountered in all areas of industry and technology. These
Unit II, Class 1, Part 2
1. Assemble your required materials
2. Drop the tennis ball for about ten times on both railing heights
3. Derive a method to solve for time using the following equation:
4. Height is analogous to the difference between y and y0. Furthermore, the initial velocity quantity is zero since the ball was dropped from rest, so the final equation to solve for the balcony’s heights is:
Watchglass with small amount of water on it
An electric balance
1. The correct equipments were collected
2. 2 equal portions of playdough were weighted (75g)
3. The portions were then rolled into balls
4. A piece of paper towel was placed onto the ground
5. The balls were carefully placed on the bench
6. 2 smaller rulers were used to measure the heights of the balls by one being put on the ball to find the top and the other was used to measure the height
7. The measurements were…
material of the soccer ball affect the speed of which it travels?
What are soccer balls made of?
What is speed? How do you measure speed?
What is velocity?
What is force?
If the material of the ball is TPU (Thermoplastic polyurethane) when kicked, then the soccer ball will travel the fastest. This is because the type of material reduces friction better than the other materials, polyurethane and synthetic leather. The speed of the balls are determined by the amount…
observed in this ball toss experiment, at any point during the free fall period, the system contains the same total amount of mechanical energy. This amount is the sum of kinetic and gravitational potential energy.
FREE FALL AND THE CONSERVATION OF ENERGY
The law of conservation of energy states that the total amount of energy remains constant in an isolated system – energy can neither be created or destroyed, but can change from one form to another. In this analysis, a ball is thrown above a…