Science Essays Examples For College & High School Students in PDF

14278 total results

A Review of Earthquakes and the Possibility of Early Detection (1926 words, 7 pages)

IntroductionMost earthquakes take place on earth as a result of movement of tectonic plates. Almost 7 percent are due to eruptions of volcanoes, and the remaining 3 percent are due to ground collapses and other causes (Stein Wysession, 2009). Therefore, earthquakes that occur among natural hazards, in particular earth geographic ... Read More

The Life, Education, and Research of Stephen William Hawking (937 words, 3 pages)

Stephen William Hawking was born in 1942 on January eighth in Oxford England. He was born three hundred years after the death of the famous Italian physicist, astronomer, engineer and a re-known mathematician. The Hawkings lived in London a place which was believed to be the best where one could ... Read More

The Issues Surrounding the Two Categories in Experimental Studies: Internal Validity and External Validity (586 words, 3 pages)

The biggest problems facing experimental studies can be broken down into two categories internal validity and external validity. The difference between these two categories is that while internal validity covers the authenticity and legitimacy of experiments concerning cause-effect relationships, external validity pertains more to the manner and environment in which ... Read More

A Study on the Reproductive Structures and Characteristics of Liveworts, Mosses, and Hornworts (1306 words, 7 pages)

AbstractThere are three divisions of bryophytes which include liverworts, mosses, and hornworts. These non-vascular plants are unique in the sense that they can absorb nutrients through their leaves. They appear to be small because they do not have the tissue structures to be large plants, but they are found all ... Read More

The Transpiration Process of Materials in the Xylem and Phloem (1344 words, 5 pages)

IntroductionUnlike animals, which have a heart and blood vessels which are responsible for transport within their bodies, animals rely on the phloem and xylem for the transportation of substances within their systems. As such, the movement of water, as well as other solutes up a plant from the roots to ... Read More

A Study of the Supernatural and Natural Causal Models of the Success and Failure of the Malagasy People (1235 words, 5 pages)

The world of farmers, hunter-gatherers, and fisherman is always a complex and risky one. Recently, Bram Tucker et. al. researched how people in the very unpredictable conditions of Madagascar credit their fortunes and misfortunes according to these practices, studying specifically the idea of co-existence thinking, which is the simultaneous application ... Read More

The Producer, Consumer, and Decomposer in the Human Body and Its Similarity to an Ecosystem (624 words, 3 pages)

The self-maintenance of an ecosystem is solely founded on thecirculation of energy as well as nutrients extracted from other sources.The energy flow through an ecosystem is basically through a food chain inwhich it is transmitted from the producers to the consumers and finally thedecomposers. A producer in the context of ... Read More

The Nuclear Arms Project and Its Risks and Dangers (921 words, 5 pages)

Proliferation DominationWhen the United States dropped the first nuclear bomb on Hiroshima in 1945, not only did it change the physical landscape of the earth, but the geopolitical landscape as well. At the time, the United States was the only entity to have nuclear technology, but countries across the globe ... Read More

The Evolution of Nuclear Energy After the Cold War (305 words, 1 pages)

As soon as the first nuclear bomb was dropped during World War II, the geopolitical landscape had changed forever and there was no going back. Since then, nuclear proliferation has increased dramatically and nuclear technology has become significantly more advanced. This paper will analyze the spread of nuclear technology since ... Read More

The Significance of Genes in the Establishment of an Individual’s Identity (605 words, 2 pages)

People vary depending on how much genes affect their identity. There is a difficult for Individuals to construct their genetic identity. Genetics has numerous insightful implications for personal identity. Michaels defines identity as an individuals sense of self, that is, the individual sense that describes who they are (2). The ... Read More

A Comparison of the Similarities and Differences Between the Eukaryotic and Prokaryotic Cells (310 words, 2 pages)

Eukaryotic and prokaryotic cellsEukaryotic and prokaryotic cells share many of the same properties but seem to differ as much as they relate to one another. First lets take a look at what it is that makes these two types of cells similar. Every cell is the most basic unit of ... Read More

The Conflicts Between the Church and Governments with the Ideas of Science (922 words, 3 pages)

Science Revolution DBQ Essay In the middle ages many of the people followed the Churchs beliefs of how the world was created without question, but as time passed, people became curious and became philosophes bringing new scientific discoveries to the world that also conflicted with the teachings of the church. ... Read More

The History and Use of Nuclear Energy (1038 words, 5 pages)

Energy is used in different ways, and there are different types of energy. Nuclear energy was researched for years, has complicated methods of making energy, and has advantages and disadvantages. It is very valuable, because a small amount of uranium (common source of nuclear energy) can make great amount of ... Read More

A Comparison of the Similarities and Differences Between DNA and RNA (384 words, 3 pages)

DNA vs. RNADNA and RNA are both very important factors in the life cycle of a living cell. Each relies on the other to work as a team to produce what the cell needs to survive. While they both have a lot in common, it is how they differ that ... Read More

The Importance of Ethics in the Field of Engineering (997 words, 3 pages)

Ethics EssayIn many professions, it is important to establish an ethical code governing the behavior of professionals in the field. This is especially true within engineering, as engineering projects require significant technical expertise and are generally used by the general public. As a result, the typical end user of an ... Read More

A Lab Experiment to Determine the Presence of the Triboelectric Series and the Charge of the Van de Graaff Generator (917 words, 5 pages)

Experimental validation of the triboelectric series and the charge of the Van de Graaff generatorIntroductionThe goal of this lab was to determine the presence and sign of charge on various materials in order to verify their locations on the triboelectric series as well as to determine the type of charge ... Read More

An Lab Experiment on the Examination of the Oscillation in an RLC AC Circuit (654 words, 3 pages)

Observation of damped oscillation in an RLC circuitIntroductionThe goal of this lab was to examine the oscillations seen in an RLC AC circuit. This was done by determining the inductance and resistance of an RLC circuit using an oscilloscope to measure the period and frequency of the pulses and comparing ... Read More

An Experiment Demonstrating the Process of Diffusion (784 words, 4 pages)

IntroductionDiffusion is the natural movement of particles from a higher to lower concentrated area. Osmosis, being a subset of diffusion, is the movement of water molecules from a lower to higher concentrated area. The goal of this lab was to see whether glucose, starch, water, or iodine could would be ... Read More

Mt. St. Helens and Its Environmental Effects on Its Surrounding Areas (1534 words, 6 pages)

The Effect of Mt. St. Helens on its Surrounding areasThe year 1980 is one which the state of Washington will remember for quite a while. During the morning of May 18, the peak of Mt. St. Helens suddenly erupted into a ball of ash that would later cause devastating damage ... Read More

A Study on the Emphatic and Pro-Social Behavior in Rats (661 words, 2 pages)

Chosen Article Empathy and Pro-Social Behavior in RatsTopic BackgroundIntroduction In this study, rats were placed in designed tests to attempt to discern the motivation of prosocial behavior in non primate mammals. When placed in the testing environment the rats nearly always released their cagemate before attempting to interact with any ... Read More

An Experiment on the Synthesis of Chromium (II) Acetate Hydrate (1298 words, 6 pages)

Synthesis of Chromium (II) Acetate Hydrate AbstractA 1.91g sample of red chromium(II) acetate hydrate was prepared, for a yield of 36. The reaction was carried out by reduction of Cr(III)Cl3 by elemental zinc under strongly acidic conditions with concentrated HCl entirely under oxygen free conditions, for a green to blue ... Read More

An Experiment Analyzing the Synthesis of Optical Tris Cobalt Enantiomers (2073 words, 8 pages)

Synthesis and Isolation of Optical Tris(ethylenediamine)cobalt(III) Enantiomers AbstractA sample of () Tris(ethylenediamine)cobalt(III) was produced by a reaction of ethylenediamine, hydrochloric acid, and cobalt sulfate which was oxidized with atmospheric oxygen with charcoal catalyst. The neutralized and filtered portion was mixed with L() tartaric acid from barium tartrate solution, separating out ... Read More

An Overview of Raman Spectroscopy (4233 words, 18 pages)

AbstractRaman spectroscopy was performed of CCl4, CDCl3 and CHCl3 to determine the vibrational state transitions. Stokes and anti-Stokes transitions were measured, allowing for an estimation of the ratio of excited and ground state molecules. Measured vibrational modes of CCl4 were at 224 cm-1, 316 cm-1, 463 cm-1, and 761 cm-1, ... Read More

Diversity on the Planet and NASA’s Quest for New Life in Outer Space (1161 words, 4 pages)

Prioritizing NASSA?Astrobiology is the study of the origin, evolution, distribution and future of life in our solar system. These resources include material about the potential for evidence of microbial life on other planets. We have debated over the importance of taking the time and money to understand the outer world ... Read More

An Experiment Analyzing the Synthesis of Hexamminecobalt Chloride (1805 words, 8 pages)

Abstract Hexamminecobalt(III) chloride, Co(NH3)6Cl3, was produced by reaction CoCl2 6H2O, NH3, and NH4Cl, bubbled through with O2 in the presence of an activated charcoal catalyst, followed by filtration and recrystallization for a 23.2 yield of an orange complex. UV-Vis spectroscopy obtained an electronic spectrum with two peaks at 334.5 nm ... Read More

An Experiment on the Synthesis and Determination of Oxobis(2,4-Pentanediono)vanadium(IV) (1748 words, 8 pages)

Synthesis and determination of Oxobis(2,4-pentanediono)vanadium(IV) AbstractOxobis(2,4-pentanediono)vanadium(IV) was formed by a reaction V2O5 with ethanol under acidic conditions with heat to reduce V(V) to V(IV) and chelated with deprotonated acetylacetone in a basic solution until neutral in pH, forming a deep blue powder that was collected by filtration under vacuo and ... Read More

An Analysis of the Factors Affecting Linear Regression Techniques (2524 words, 9 pages)

Calculation of bond length, dissociation energy, and sampling temperature of H79Br and H81Br from FTIR spectra of rotational and vibrational transitions using linear regression techniquesJanuary 30, 2015AbstractThree FTIR spectra of H79Br and H81Br for the vibrational transitions from were analyzed, using linear regression techniques to find the bond lengths, dissociation ... Read More

The Technological Advancement in Communications Since the Invention of the Telephone by Alexander Graham Bell (1934 words, 7 pages)

Today, humans rely on technology to do everyday things. Its almost hard to imagine the world without smart phones, computers, or the internet. Some may argue that people are too dependent on technology, and some may argue that more is needed for the sake of making life easier. Having said ... Read More

A Study on the Effects of Positive Reinforcement on Rats Through Electrical Impulse (866 words, 3 pages)

Chosen Article POSITIVE REINFORCEMENT PRODUCED BY ELECTRICAL STIMULATION OF SEPTAL AREA AND OTHER REGIONS OF RAT BRAIN BY JAMES OLDS AND PETER MILNERTopic BackgroundIntroduction This paper studies the effect over pleasure centers on an organisms behavior, specifically the outcome if the organism can stimulate them on command. The specific stated ... Read More

An Overview the Application of Group Theory in Chemistry (1980 words, 9 pages)

A Review of Group Theory in Chemistry and its ApplicationsIntroductionGroup theory is a central topic in the discipline of abstract algebra, however, its application is also critical to many problems and areas of chemistry. Group theory offers a systematic method for classifying crystal structure, determining spectroscopic properties, and understanding molecular ... Read More

Science Essay Examples