Science Essays Examples For College & High School Students in PDF

14278 total results

Understanding the First Law of Motion of Sir Isaac Newton (563 words, 1 pages)

An object in motionSir Isaac Newtons first law of motion is that an object in motion stays in motion, and an object at rest stays at rest. Newton wasnt only a mathematician and physicist, but also a natural philosopher, and to this day his first law still applies, not only ... Read More

An Argument in Favor of Basing Actions on Scientific Facts (1817 words, 4 pages)

Human actions should be based on scientific fact, not religious faith.The relentless rise of science over the centuries, from the days of the great ancient Greek philosopher-scientists such as Democritus and Aristotle to the present days biological experiments with implanting human glial cells into the brains of rodents, has not ... Read More

The Significance of Telescopes in the Field of Science (2743 words, 11 pages)

AbstractThe usage of space telescopes provide scientists with insight into the realm of exoplanets and the way the universe operates. The universe sends signals out through infrareds, visible wavelengths, gamma-rays, and X-rays. Multiple types of telescopes have been developed to independently capture each form of observing the universe. Additionally, scientists ... Read More

An Experiment on the Chemical Purification of Spinach Through Column Chromatography (2124 words, 8 pages)

Absorbance Spectra of Spinach Fractions Purified by Column Chromatography1.) IntroductionColumn chromatography is a particular branch of chemical purification, by which the components of a substance are separated from each other based on each components chemical interactions with certain filters absorbents and solvents. The analyzed species, often a solid ground into ... Read More

A Study of Mortality Factors of the Holly Leaf Miners (1283 words, 5 pages)

Mortality Factors of the Holly Leaf Miners (Phytomyza ilicis)Introduction Leaf Miner BackgroundThe holly leaf miner (Phytomyza ilicis) is a fly larva that lives and eats the plant tissues of holly trees (Llex aquifolium) and is characterized by leaving pale trails in the epidermis of the holly leaf, these are often ... Read More

A Study of the Different Lobes of the Brain (1047 words, 6 pages)

The cerebrum or cortex is the largest part of the human brain, associated with higher brain function such as thought and action. The cerebral cortex is divided into four sections, called "lobes" the frontal lobe, parietal lobe, occipital lobe, and temporal lobe.The frontal lobes are considered as our emotional control ... Read More

A Lab Experiment to Produce Solubility Product from Titration of Saturated Solutions (1371 words, 6 pages)

Deriving Solubility Product from Titration of Saturated Solutions1.) IntroductionJust as acid-base titrations can be used to deduce the concentration of an acid or base of interest, one can derive the concentration of an ion in a solution by incrementally adding to the solution a compound capable of reacting with that ... Read More

A Study of the Scavenger Characteristics of the Tyrannosaurus Rex (1130 words, 5 pages)

The intra-guild competition within theropods study done by Carbone, Turvey, and Bielby made the distinction between predators and obligate scavengers. In order to identify a Tyrannosaurs rex as a scavenger, it would only have to consume carrion to survive. This results in a highly competitive environment for T-rexes and other ... Read More

NASA Should Save the Hubble Telescope from Destruction (705 words, 3 pages)

Would you let history go down in flames? That's exactly what NASA is doing with the Hubble Space Telescope. NASA has decided to scrap Hubble and watch it burn in the atmosphere of Earth. Should we keep maintaining Hubble in orbit and leave it unscathed from the heat, or just ... Read More

An Experiment Showing the Uses of a Micrometer (1429 words, 10 pages)

AbstractThe lab experiment was done to investigate the uses of a micrometer. The research collected data from nuts through measuring their width and analyzed the data using Microsoft Excel for analysis. The study showed different characteristics of the data obtained from the analysis. The study acquired samples from the experiment ... Read More

An Experiment Studying the Relation Between Mole, Volume and Molarity (432 words, 2 pages)

Mole, volume, and molarity relationshipsIntroductionThis lab was conducted to show how calculations can be used to prepare a dilute solution from a stock solution, using the dilution law I. (V1C1V2C2) where C is molarity measured in units of moles per liter, and V is volume of the solution.II. The concentration ... Read More

An Experiment Showing the Reaction Properties of Hydrogen and Oxygen Gas with Fire (738 words, 3 pages)

The purpose of this experiment was to show the properties of hydrogen and oxygen gas reacting with fire. Both H2 and O2 were produced from reactions of other chemicals. H2 gas was produced from a reaction of hydrochloric acid and zinc, and oxygen was generated from the decomposition of hydrogen ... Read More

An Experiment Showing the Effects of Mass and Volume on Density (593 words, 3 pages)

Calculated densities of metal samples from measurements of mass and volumeIntroductionThis experiment was conducted to show how density is affected by mass and volume. Measurements of mass and volume were taken of two solids and two liquids, one known and one unknown for each. Their densities were calculated, using the ... Read More

An Experiment Showing the Different Emission Spectra of Chemicals and Elements (547 words, 4 pages)

This lab was conducted to show the emission spectra of different chemicals and elements through flame tests and emission tubes. Emission spectra can be used to classify and also identify elements and compounds.II. For flame tests, various salts were burned and the colors produced were observed. Emission tubes and a ... Read More

The History of Tulip in Europe (906 words, 3 pages)

Beauty Disguised The tulip was first introduced to Europe by an Ottoman Turk ambassador named Ogier Ghislain de Busbecq, who brought them with him when he came from Constantinople. Throughout history, the tulip has been inconspicuous until it was discovered in Asia by the Turks. Since then, tulips have been ... Read More

An Experiment Conducted to Show How Density is Affected by Mass and Volume (644 words, 2 pages)

Calculated densities of solids and liquids from measurements of mass and volumeIntroductionThis experiment was conducted to show how density is affected by mass and volume. Measurements of mass and volume were taken of two solids and two liquids, one known and one unknown for each. Their densities were calculated, using ... Read More

An Experiment on the Manipulation of the Ideal Gas Law to Determine Unknown Gases (568 words, 4 pages)

Unknown gases can be determined using measured properties by manipulating the Ideal Gas Law PV nRT, where P is pressure, V is volume, n is moles of gas, R is the gas constant, and T is temperature.1 The equation can be rearranged to solve for moles of gas, and if ... Read More

An Experiment on the Effects of Reagents to the Chemical Equilibrium of a Solution (1071 words, 3 pages)

Effects of Changing Chemical EquilibriumIntroductionIn a chemical equilibrium, the rates of the forward reaction and the reverse reaction are equal. Changes such as adding a reagent or changing temperature will change the equilibrium, and the system will compensate by moving in the opposite direction of the change, as defined in ... Read More

The Measurement of Crystal Violet Absorbance at Time Intervals by Determining the Rate Law for the Reaction Between Crystal Violet and Hydroxide (567 words, 4 pages)

Crystal Violet AbsorbanceIntroductionCrystal violet reacts with sodium hydroxide and the rate of this reaction is kCVmOH-n, where k is the rate constant for the reaction, m and n represent the reaction order for crystal violet, and hydroxide, respectively.1 Because the reaction has a purple color that changes to colorless as ... Read More

The Use of Avogadro’s Law to Find the Molar Volume of Gas at STP (675 words, 3 pages)

Avogadros Law and Molar Volume at STPIntroductionAvogadro's Law states that the amount of moles and the volume of a gas are directly proportional when temperature and pressure are held constant. 1 This law also led Avogadro to determine that the volume of any gas at STP (273 K , 1 ... Read More

A Lab Experiment to Determine the pH of Solutions Using Indicators (461 words, 2 pages)

pH of Solutions Determined with IndicatorsIntroductionMost chemicals are colorless, with an exception being a group called dyes. There is a special type of dye called indicators, which have removable protons and will change color if the proton is removed. 1 Each indicator has a unique pH transition range that it ... Read More

An Experiment Showing the Relation Between Concentration and Absorbance of Light (638 words, 5 pages)

Solutions of different colors will absorb a certain amount of light at each wavelength. The absorbance levels for a solution depend on both the concentration of the color in the solution and the actual color itself. Each differently colored solution will have a certain wavelength of maximum absorbance, called max. ... Read More

A Lab Experiment to Determine the Molar Mass of a Solute from the Freezing Point Depression of a Solvent (609 words, 3 pages)

Determining Molar Mass of a Solute from Freezing Point Depression of a SolventIntroductionWhen a solid is heated, its average kinetic energy will rise until it goes through a phase change and melts into a liquid. Once the solid cools, the temperature will remain constant until the freezing of the solid ... Read More

The Synthesis of Esters Using the Process of Fischer Esterification (404 words, 2 pages)

Fischer EsterificationIntroductionEsters are organic molecules that are generally associated with good smells and fragrances. An ester consists of an R and R group, which are both carbon chains. When a carboxylic acid and an alcohol react with each other, it produces ester and water. This process is called Fischer Esterification, ... Read More

An Experiment on Chromatography Using Various Dyes and Solvents (597 words, 3 pages)

Chromatography with various dyes and solventsIntroductionChromatography is the separation a mixtures into their individual parts by passing it through a solution.1 It can be used when isolating compounds, or in forensics with DNA chromatograms, which is a graph showing the result of separating components from a mixture. Components of a ... Read More

An Experiment to Determine the Molarity of an Unknown Solution in an Acid-Base Titration (529 words, 2 pages)

Acid-base titrations with sodium hydroxide and acetic acidIntroductionTitrations allow the calculation of the concentration of a solute in an unknown solution, based on a standard solution, where the concentration is known. Acids and bases combine in solution to form water and a salt, essentially neutralizing each other. For example, sodium ... Read More

A Lab Experiment to Calculate the Solubility Product Constant of an Ionic Salt from Titrations (772 words, 3 pages)

Calculating Ksp of an Ionic Salt from TitrationsIntroductionDifferent substances dissolve to different degrees in water. Some ionic salts may completely dissociate into their ions, while some salts may only partially dissociate. The degree to which a substance is soluble in water is called Ksp, or the solubility product constant, which ... Read More

An Experiment to Understand the Important Factors That Affect the Evolution of Species (1102 words, 7 pages)

Natural Selection Beak Sizes and PopulationThis Lab Report demonstrates how by manipulating important parameters that influence natural selection, can cause changes to occur that influence the evolution of beak size and population numbers for the Finch populations of "Darwin Island" and "Wallace Island." Parameters that can be manipulated are Beak ... Read More

An Analysis of Light Refraction in The Sky and In a Rainbow (1504 words, 8 pages)

IntroductionWhy is the sky blue? How is the rainbow formed? These are questions that have existed for almost as long as humanity started inhabiting earth. The current paper analyzes the scientific explanations of how light is manipulated to manifest beautiful phenomena and optical illusions that define the beauty of the ... Read More

The Important Contributions of Louis Pasteur in the Field of Science (501 words, 2 pages)

At the Seventh International Medical Congress in London of 1881, Louis Pasteur presented groundbreaking research on vaccinations. Diseases are sometimes deadly. Aside from predators, diseases are one of the main things that destroy human life. Any medical research that can potentially save lives is usually regarded in a positive light. ... Read More

Science Essay Examples