Science Essays Examples For College & High School Students in PDF

14278 total results

An Experiment on the Synthesis and Determination of Bis (tetraethylammonium) Tetrachlorobaltate (II) (1911 words, 8 pages)

Synthesis and Determination of Bis(tetraethylammonium) Tetrachlorocobaltate (II) AbstractBis(tetraethylammonium) tetrachlorocobaltate (II) was formed by a reaction of aqueous CoCl2 6H2O and aqueous tetraethyl ammonium solutions, yielding a blue precipitate. The solution was filtered under vacuum and recrystallized producing a blue powder with a 67.9 yield. UV-Vis spectroscopy revealed an electronic spectrum ... Read More

An Experiment on the Determination of Dissociation Energies, Bond Force Constants, and Change in Sublimation Enthalpy of I2 (3287 words, 18 pages)

Determination of dissociation energies, bond force constants, and change in sublimation enthalpy of I2 at ground and excited electronic states from UV-visible spectra of electronic and vibrational state transitions.AbstractUV-visible spectroscopy was used on I2 vapor from 490 nm to 650 nm at 37.9C and 62.3C to produce two different spectra. ... Read More

An Experiment Measuring the Refractive Index of Two Solutions (2537 words, 12 pages)

Determination of dipole moment and orientational polarization of chlorobenzene and o-dichlorobenzene in dilute solution from measured capacitance and refractive indexAbstractSolutions of chlorobenzene in cyclohexane and o-dichlorobenzene in cyclohexane in varying dilute concentrations were measured for capacitance and refractive index in order to determine orientational polarization and dipole moment using the ... Read More

An Examination of the Justification of Paranormal Beliefs and Ideas (1065 words, 4 pages)

PLACING PARANORMAL IN SCIENCE In todays world, scientific studies have been utilized by individuals and the accumulated knowledge of humanity depends on constant analytical and critical thinking. However, from the earliest stages of intellectual development of human kind, paranormal beliefs and ideas have also been favored by individuals and have ... Read More

An Analysis of the Effects of Acceleration and Dimension in the Formation of a Crater (380 words, 2 pages)

Does acceleration and dimension of an object affect the size of the crater it will make? The answer is yes. Of course they do. But what Im trying to learn from this project is how acceleration and dimension affect the crater. I chose this topic because I am very interested ... Read More

An Analysis of the Ideal Soil for Growing Plants (331 words, 1 pages)

The question I asked for the science fair is What grows plants faster in store bought soil or soil from your own yard? My hypothesis is that plants will grow better in soil from your own yard. I chose this topic because it was simple but could help people discover ... Read More

The Idea of the Actual Wave Function (320 words, 1 pages)

Although energy is constantly moving, there are specific instances in which there are observable constants. Nothing ever happens in a stationary state, as the system remains in the same state as time progresses. Everything in this solution is dependant upon time, especially the probability density. The actual wave function is ... Read More

The Discovery of Plate Tectonics and the Awareness of Sea Floor Spreading (656 words, 3 pages)

Chapter 2Chapter two had been an idea originally created by Harry Hess, not exactly, but he had been on the right track. Hess had introduced the awareness of Sea Floor Spreading, which meant that the ocean floor had been moving old rock towards land. While this had been going on ... Read More

A Study on the Similarities and Differences Between Chimpanzees and Humans (641 words, 2 pages)

Chimpanzees are the closest living relative of human beings andremarkably, they are 99 percent identical in terms of the coding sequencesof their DNA. This shouldn't be surprising considering the similarities inmorphology between chimpanzees and humans, but the high level of similarityis surprising, considering some significant differences such as brain size.If ... Read More

The Alvarez Hypothesis as the Reason for the Extinction of Dinosaurs from the Earth (1006 words, 3 pages)

The fossil record indicates that dinosaurs roamed the Earth for morethan 180 million years before suddenly disappearing sometime around 65million years ago. Scientists were puzzled by the sudden disappearance ofdinosaurs and various competing theories were offered. The Alvarezhypothesis, named after scientists Luis and Walter Alvarez, offered acontroversial explanation that involved ... Read More

An Experiment on the Formation of a Racemic Mixture Through the Microwave Process of 4-Tert-Butylcyclohexanone in Sodium Borohydride and Silica Gel (847 words, 6 pages)

AbstractWhen 4-tert-butylcyclohexanone is microwaved in sodium borohydride and silica gel, a racemic mixture is formed. The racemic mixture is cistrans-4-t-cyclohexanol. The reaction scheme can be seen in Figure 1. Figure 1 Mechanism for the reduction of 4-t-butylcyclohexanone shown using chair conformations. The major product is the trans product.To determine the ... Read More

An Experiment on the Creation of 1-Methylcyclohexene Through the Distillation of 2-Methylcyclohexanol (912 words, 6 pages)

AbstractDehydration reactions are often used in many situations to change one molecule into another with the use of water and acid. The dehydration of 2-methylcyclohexanol was used to reinforce the use of Br2 testing, IR spectroscopy, and to display a dehydration reaction. The dehydration resulted in a product which was ... Read More

A Research on the Neanderthal Genes in the Human Genome (694 words, 2 pages)

Up to 4 percent of the DNA of modern humans consist of genes found inthe Neanderthal genome. Not until 2010 did scientists discover theseNeanderthal genes in the human genome, which provided strong evidence thatHomo sapiens not only coexisted with Neanderthals, but interbred andproduced viable offspring. Across non-African populations, it is ... Read More

The Human Conquest of Mars: Obstacles and Solutions for Human Space Exploration (1461 words, 5 pages)

Obstacles and Solutions for Human Travel and Exploration of MarsMan is not destined to stand idle in the face of new frontiers and undiscovered fortunes. Since the beginning of time, man has risked nothing short of his own life to step beyond dreams and achieve the reality of the new ... Read More

A Study on the Origin of the Moon Through the Giant-Impact Hypothesis (653 words, 2 pages)

The leading hypothesis for the origin of the moon is the giant-impacthypothesis. The moon is believed to be the result of a giant impact betweenthe Earth and Mars-sized astronomical body that occurred 4.5 billion yearsago. This massive impact would have resulted in the loss of all gases fromthe debris of ... Read More

An Experiment Documenting the Behavior of Woodlice in Different Environments (3225 words, 8 pages)

GCSE Biology Controlled AssessmentInvestigating the behaviour of woodlice in different conditions. Background information Woodlice belong to a biological class Crustacea. This class consists of mostly aquatic animals, which breath with the aid of primitive lungs, but despite that, they lack the features of most other land dwelling arthropods, like waterproof ... Read More

A Definition of the Condition of Chimerism in Animals (372 words, 3 pages)

Chimerism is a unique biological condition that can occur in animals when two zygotes which would normally form to become separate twins fuse together, creating one organism with two distinct sets of DNA in different locations. The word chimerism originates from Greek mythology the Chimera was a beast composed of ... Read More

A Lab Experiment to Describe the Changes in the Back-and Forth Motion of a Pendulum by Measuring the Properties of a Pendulum (785 words, 4 pages)

This pendulum labs objective is to describe how the back-and-forth motion of a pendulum can be changed through measuring the properties of a pendulum, as well as determine which properties of a pendulum affects its period. Groups of generally four students created their own pendulum, all materials provided in the ... Read More

A Proposal for the Restoration of Large Wild Vertebrates from the Pleistocene Era into North America in Re-wilding North America (1593 words, 6 pages)

In the journal article Re-wilding North America, twelve conservation scientists and scholars wrote a proposal for restoring large wild vertebrates from the Pleistocene era into North America. The Pleistocene era is defined as first epoch of the Quaternary period. These biologists accepted that the presence of the human species was ... Read More

A Lab to Determine the Concentration of SCN in Keith’s Sample (953 words, 4 pages)

Keith EqualBeginning IdeasIn order to determine the concentration of SCN in Keiths sample, methods used in previous abs were looked back to. Although colorimetry, titrations, and finding linear regression were used in previous labs, there were still things to understand in this one. One of the major things that had ... Read More

A Lab to Test How Well Energy and Momentum Were Conserved in a Collision Between Two Carts (981 words, 6 pages)

Momentum LabBeginning IdeasIn this lab we tested how well energy and momentum were conserved in a collision between two carts. Based on what we learned in class, the carts in an elastic system should adjust their velocity to keep the momentum and the kinetic energy in the system the same. ... Read More

A Lab Experiment on the reaction Between Crystal Violet and Sodium Hydroxide (382 words, 2 pages)

Crystal Violet LabBeginning Ideas The purpose of this lab was to determine the rate law of the reaction between different amounts of crystal violet solution and sodium hydroxide. To start, this lab had much to do with the previous Blue Dye lab, which involved determining an unknown concentration. One thing, ... Read More

A Lab Experiment on the Idea and Components of Momentum (1222 words, 4 pages)

Lab Write-UpBeginning Ideas Recently, in AP Physics weve discussed the idea and components of momentum. Momentum being the quantity of motion of a moving body and is measured in the product of its mass and velocity (Newton x Seconds). Weve learned about different concepts such as change in momentum, elasticinelastic, ... Read More

A Lab Involving the Concept of Hooke’s Law and the Idea of Simple Harmonic Motion (498 words, 2 pages)

SHM Lab Write-UpBeginning Ideas Two concepts that played a major role in this lab were Hookes Law and the idea of Simple Harmonic Motion. Hookes Law states that the force required to extend or compress a spring is proportional to the distance the spring is extended or compressed. The spring ... Read More

The Life and Contributions of Dr. Percy Lavon Julian (867 words, 4 pages)

Dr. Percy Lavon Julian was a spearheading chemist whose findings enhanced the field of science and saved many lives. A grandson of a slave, Julian grew up facing a lot of obstacles because of his skin color (Drew, 1950). African Americans during his time faced a lot of challenges like ... Read More

A Lab Experiment to Determine Exothermic and Endothermic Reactions (1754 words, 9 pages)

Lab Heats of ReactionClaimsThe reaction between calcium metal and hydrochloric acid is exothermic because the reaction releases energy, as shown in the negative heat of reaction value. The reaction between ammonium nitrate and water is endothermic because the heat of reaction is positive. IntroductionIn nearly every chemical reaction that occurs, ... Read More

The Organic Evolution of Physics and Ethics Since Their Development (2092 words, 7 pages)

To what extent is commonly accepted knowledge discarded in favor of new truths that have a more evidential basis? Looking specifically at examples in the science of physics and the practice of ethics, we will see knowledge is turned over quite often in favor of better, more useful truths that ... Read More

A Lab Experiment to Synthesize Alum from Aluminum Soda Cans and the Efficiency of the Reaction (1378 words, 7 pages)

IntroductionAlum is a chemical which can be synthesized from aluminum. The uses of alum include water purification, flame retardant, and making explosives. The purpose of this lab is to synthesize alum from aluminum soda cans and to determine the efficiency of the reaction. Also, after doing this lab, it should ... Read More

The Concept of Paradigms in The Structure of Scientific Revolutions by Thomas Kuhn (1437 words, 5 pages)

Thomas Kuhn was a philosopher of science who put forward the concept of paradigms in describing the history of science in his work The Structure of Scientific Revolutions. The idea behind his work is that scientific progress is explained in terms of periodic shifts in the models or frameworks with ... Read More

The History of Artificial Life and the Concept of the Man-Made Systems (1080 words, 4 pages)

Artificial Life.Artificial life is described as life that is made by man rather than by forces of nature. It is a scope of study that deals with human-made systems. These systems possess typical behaviors to the natural system. Also referred to as Alife' it is a broad discipline that studies ... Read More

Science Essay Examples