Science Essays Examples For College & High School Students in PDF

14278 total results

An Experiment for Constructing 2-Methylphenoxyacetic Acid, a Complex Biologically Active Compound (555 words, 3 pages)

The purpose of this experiment was to construct a complex biologically active compound, 2-methylphenoxyacetic acid. This was preformed using a synthesis reaction by combining two simple compounds, 2-methylphenol and sodium chloroacetate. Suction filtration was used multiple times in the experiment to separate the product from solvent. After obtaining a crude ... Read More

IntroductionWhen biologists refer to the term protists, they can really be talking about a number of different types of organisms. The classification of protists is so wide that it almost feels as though protists are essentially any Eukaryotic organism that is not classified as an animal, land plant, and true ... Read More

A Lab Report on the Experiment of Replicating the Evolution of the Flat Periwinkle (2054 words, 15 pages)

INTRODUCTIONOn the rocky shores of New England, there lives a small but interesting snail known as the flat periwinkle. The flat periwinkle snail has been the subject of study pertaining to natural selection. This is due to the European green crab being introduced in that area around the 1900s. The ... Read More

A Report on an Experiment to Obtain 4-Bromo-2-(Hydroxymethyl)-Phenol Using Multi-Step Synthesis (523 words, 2 pages)

Experiment 19 Multi-step SynthesisMulti-step synthesis is the process of obtaining a specific target organic compound by using smaller, more common organic compounds. This experiment examined the target molecule at hood 3, which was 4-Bromo-2-(hydroxymethyl)phenol (C7H7BrO2). It was determined that salicylaldehyde (C7H6O2) could be used to form this compound in two ... Read More

An Experiment to Determine the Baseline Rate of Genetic Recombination in Sordaria Fimciola (1046 words, 5 pages)

INTRODUCTIONSordaria fimciola has been found in different strains amongst the North-Facing Slope and South-Facing Slope of the Evolution Canyon in Israel. Strains of wild-type spores in the south-facing slope have shown increased frequencies of recombination due to harsh environmental conditions. When studied in the laboratory, it is important to record ... Read More

The Importance of Biodiversity for the Existence of Life on Earth (475 words, 2 pages)

Biodiversity can be referred to as the variation of life on a global level to a specious level. It is of great importance on even the minutest scale, as a simple offset can tip the flow of an entire ecosystem. Biodiversity is a valuable environmental aspect to say the least ... Read More

An Analysis of Polymorphic Mutations in Haplogroups from Africa (1082 words, 9 pages)

ABSTRACTPhenotypic variation in humans has been linked to variation at the genotypic level, particularly in the mitochondrial genome. Human mitochondria are almost always linked to the individuals mother, and these lineages can provide information on human history and migration patterns (Grzybowski, 2012). Polymorphic mutations are placed into haplogroups, believed to ... Read More

A History of Neil Armstrong and Buzz Aldrin Landing on the Moon (931 words, 4 pages)

Apollo Eleven was the historic space flight that landed the first humans on the moon. Americans Neil Armstrong and Buzz Aldrin touched down on the lunar at surface on July twentieth 1969 at 2018 Universal Coordinated Time or UTC. Armstrong became the first man to step onto the moons dusty ... Read More

A Study of Nutrient Concentration on the Growth of Lemma Minor and Salvinia Minima (2552 words, 20 pages)

ABSTRACTFigure 1 Components of investigation examining the effect of changes in nutrient concentration and competition on growth of Lemna and Salvinia.Figure 1 Components of investigation examining the effect of changes in nutrient concentration and competition on growth of Lemna and Salvinia.Plants that live in aquatic environments are oftentimes subject to ... Read More

The Adverse Effects of Glyphosate Based Herbicides in the Environment (1666 words, 7 pages)

IntroductionGlyphosate is the active chemical ingredient in Roundup and other broad spectrum systemic herbicides. It is marketed by Monsanto Company. It is an analogue for the natural amino acid glycine, existing as zwitterions in which phosphonic hydrogen is dissociated and joins with the ammine functional group. (Tu et al.2001).Glyphosate was ... Read More

Pilots’ Ways of Dealing With Controlled Flight Into Terrain and the Dangers of Aviation (1818 words, 8 pages)

Controlled Flight Into TerrainIn primary, instrument, and commercial flight training, a student pilot is inundated with information and warnings on the great and varied dangers of aviation. In spite of all of this information, if one were to spend a few days loitering around a municipal or other small airport, ... Read More

The Importance of Integrity in Science (519 words, 3 pages)

I was quite shocked after reading how many influential psychologists develop fraudulent results into their published papers. I think one of the largest reasons that I was so shocked is that I hold psychology to such high standards I want to be a psychologist and I want the field to ... Read More

The Life, Work and Impact of Carl Sagan in the Field of Science (3741 words, 14 pages)

By no means the most important scientist of his day, paling in comparison to the greats of the 20th century such as Einstein, Feynman, and Planck, Carl Sagans impact on the fields of modern astrophysics and planetary science, and more importantly, his endeavors into bringing popular science into the lives ... Read More

Determining a Freezing Point of a Sample, a Freezing Point Depression Constant and the Molar Mass of an Unknown Substance Dissolved in the Sample (1325 words, 9 pages)

Formal Lab Report Lab 5Freezing point depression constant (TBOH) and Molar Mass Unknown compoundAbstractIn this lab it was important to be able to determine three main points of interest. The first of the objectives was to determine the freezing point of a sample of pure tert-butyl aclcohol (TBOH). The secondary ... Read More

Lewis Dot Structures and Vsper (532 words, 2 pages)

Lewis Dot Structures and VsperLewis structures (also called electron-dot structures) are formed when Lewis symbols (also called electron-dot symbols) are combined. Lewis symbols are a simple way of visualizing the valence electrons in an atom. In a Lewis symbol, the symbol for the element is used to represent the atom ... Read More

An Examination on the Effects of the Temperature of Milk Used in Making Yogurt on the Rate of Fermentation (2181 words, 20 pages)

AbstractThis paper focuses on how the temperature of the milk used in making yogurt affects the rate of fermentation in yogurt throughout the process of the experiment. Research was conducted through online sources and the average temperature that milk should be used at was 42 Degrees Celsius. The control range ... Read More

A Study on the Unknown Density of a Mixture, by Determination of the Density of Multiple Mixture Ratios of the Same Mixture (1328 words, 7 pages)

A study on the unknown density of a mixture, by determination of a the density of multiple mixture ratios of the same mixture (H2OC3H8O)AbstractThe density of the parts of the individual parts of a mixture is important in the determination of the ratio of the parts of the mixture by ... Read More

A Lab Experiment of the Titration of Unknown Acid H2A With NaOH (1139 words, 5 pages)

Titration of unknown acid H2A with NaOHAbstractThe composition of a chemical compound of an acid is important to know when working with any level of chemistry. When presented with an unknown acid one of the many ways to determine what the elemental makeup of the chemical might be is through ... Read More

A Discussion on the Theories Related to the End of the World (1094 words, 4 pages)

Doomsday... a reality? Or just a fallacy?The end of the world is a very controversial topic as it affects everyoneon the planet Earth. One idea about how it will all end comes up, and theneveryone takes it to the extremes and starts taking every bit of historyand forming it into ... Read More

A Lab Assignment Involving the Recreation of Medieval Weaponry With Nothing Other Than Office Supplies and Candy (942 words, 3 pages)

In this assignment, I recreated medieval weaponry with nothing other than office supplies and candy. The catapult that I had built had gone through many prototypes as I built it. My thoughts were that I needed to have enough power to launch the Skittle, yet not too much, that will ... Read More

A Lab Report on Recording the Solubility, Melting Time, an Other Properties of Several Chemical Compounds (1242 words, 6 pages)

Pre-AP Chemistry Lab Report Purpose The purpose of this Experiment is to record the solubility, melting time, electrical conductivity, and physical properties of several chemical compounds including Stearic Acid (CH(CH)COOH), Calcium Chloride (CaCl), Cetyl Alcohol (CH(CH)CHOH), Potassium Chloride (KCl), Strontium Nitrate (Sr(NO)), Dextrose (CHO), and 2 unknown compounds that will ... Read More

The Advantage and Disadvantage of Space Exploration (401 words, 1 pages)

Space exploration is a program that has many costs, not just financial. While it is beneficial to the country, there are also disadvantages to the program that must be considered. While there are many factors to assess, the financial cost and the comparison of advantages and disadvantages to citizens are ... Read More

The Risk and Ethical Issues concerning the Process of Cloning (973 words, 5 pages)

Human cloning has been a recent issue that is controversial due to the ethics and the questions of morality related to it. Cloning is the practice of using human embryonic stem cells or the creation of embryos to create human beings. Cloning can have potentially lifesaving benefits by generating treatments ... Read More

A Lab Experiment Showing the Functionalities of the Analog Tool (831 words, 9 pages)

Description The purpose of this lab is to learn the functionalities of the analog discovery tool and how to use them. The analog discovery is a tool that includes the capability to generate various waveforms with user-defined amplitudes and frequencies. Also included is a built in oscilloscope and voltmeter that ... Read More

An Experiment Comparing the AC Voltage of the Collector and the AC Voltage of the Base (1786 words, 15 pages)

We then set the value of VBB to the value that we calculated in Step 1 and did a simulation of circuit voltages and currents at this bias point. Here are some of the values from the simulationThe value of the collector current found in this step is 538.6 A ... Read More

An Examination of the Threat of the Japanese Fukishima Nuclear Leak (346 words, 2 pages)

Examining articles on the Japan nuclear leak requires the use of the critical thinking skills mentioned in the Environmental Science textbook. The million dollar question that one of the articles I read asks is How much does the risk of cancer go up as a result of exposure to radiation? ... Read More

The Endocrine System and Its Functions (636 words, 3 pages)

Endocrine SystemThe endocrine system is one of the major control systems of the human body. This system is vital for the production, storage, and secretion of various hormones. What makes the endocrine system unique in terms of secreting hormones is the fact that it secretes hormones directly into the bloodstream, ... Read More

The Role of Hydrogen Bonding in the Formation of H2O (493 words, 2 pages)

Water, or otherwise H2O, is one of the most essential molecules on earth in terms of life. Its molecular structure, in the form of a bent V-shaped molecule forms many hydrogen bonds, one of the most essential features of one of the most important molecules for life. The hydrogen bonding ... Read More

The Life and Achievements of Nikola Tesla a Scientist and Inventor (839 words, 3 pages)

Nikola Tesla was a Serbian-American inventor in the late 19th and early 20th century. Tesla invented many things and had around 300 patents worldwide. Most notably of these was his design of alternating current (AC) which is used today throughout the entire world to provide electricity to countless homes. Tesla ... Read More

A Construction of a Punnett Square to Follow a Mutation (1101 words, 3 pages)

Humans normally have a diploid set of 46 chromosomes in every nucleus of their cells. The very last pair of chromosomes are the non-autonomous sex chromosomes. Males carry an X chromosome and an Y chromosome, while females carry two X chromosomes. An X chromosome when compared to a Y chromosome ... Read More

Science Essay Examples