Science Essays Examples For College & High School Students in PDF

14278 total results

A Brief Introduction to Technology for Dramatic Improvements in Space Launch and Orbital Transfer Safety (214 words, 1 pages)

Technology for dramatic improvements in space launch and orbital transfer safety through improvements in reliability, operability and responsiveness The program is designed to develop advanced technology concepts and methodologies for application by industry, provide the foundation for focused programs to address national needs, respond quickly to critical safety and other ... Read More

A Summary of a Chemistry Experiment About Acids (348 words, 1 pages)

What substances turned into Acids? What substances turned into Bases? Hypothesis Procedure Pour about three milliliters of your sample in each of three test tubes. Pour the same amount on a watch glass. In the first test tube put in two drops of methyl orange and record the color. In ... Read More

A Biography and the Accomplishments of Marie Curie One of the Greatest Scientists (1761 words, 3 pages)

The accomplishments Marie Curie has achieved throughout her lifetime are truly incredible. She has undoubtedly changed science forever with the help of her husband Pierre Curie and other fellow scientists. Her work with radioactivity has also helped with technology today, such as x-rays and methods to help with the treatment ... Read More

A Report on the ChemCAD Simulation (890 words, 4 pages)

Comment you should have e-mail submissions so that charts and pics can be part of the work Procedure 1.Prepare 1 molar NaOH solution for liquid feed. Prepare 2 mol CO2 gas feed. 2.Record base feed conductivity (time 0) 3.Start vapor feed up the column. 4.Start liquid feed down the column. ... Read More

A Look at the Search for Extraterrestrial Intelligence (SETI) in the Search for the Unknown in Life (1167 words, 2 pages)

"SETI-the Search for Extraterrestrials" In the long adventure to find extraterrestrial intelligence, there has been many obstacles trying to get the signals the scientist need to prove ETI. SETI(The Search for extraterrestrial Intelligence) is a group of scientist searching the unknown for life. The main character in this search is ... Read More

An overview of the Human Pluripotent Stem Cell Research (1209 words, 2 pages)

Many people have not been fully informed on the topic of human pluripotent stem cell research. Most American have heard a lot on one side, and very little on the other. Hence, they have not and can not fully evaluate the facts and can only give snap decisions, according to ... Read More

An Analysis of the Biological Basis of Personality (1558 words, 3 pages)

Biological basis of personality Personality is not a neat science. From the beginning there has been fuzzy boundaries on the definition of all the factors involved in personality assessment. With the major assessment tool being the five factor model being derived from a "lexicographer's nightmare," early in the 20th century, ... Read More

Richard D. Keynes’ Article on Ion Channels in the Nerve-Cell Membrane (865 words, 2 pages)

A Summary Ion Channels in the Nerve-Cell Membrane In this article, Richard D. Keynes details the workings of ion channels in nerve cell membranes. Nerve impulses (action potentials) are the unit by which information travels in an organisms nervous system, and the generation of this action potential is dependent on ... Read More

An Analysis of the Production of ATP Through Glycolysis in the Mitochondria (865 words, 2 pages)

ATP Production Metabolism, which encompasses glycolysis, the Krebs cycle, and the electron transport system, occurs in the mitochondria of cells. The mitochondria consist of a double membrane and an inner compartmentalization called the matrix. Each of the processes of metabolism occurs in specific locations in and around the mitochondria. The ... Read More

Atom Prior to 1900 (427 words, 1 pages)

ATOM PRIOR TO 1900 In the 5th cent. B.C. the Greek philosophers Democritus and Leucippus proposed that matter was made up of tiny, indivisible particles they called atom, or in Greek "a-tomos". The reason why they assumed this is because nothing can come from nothing. Democritus believed that all atoms ... Read More

An Analysis of Features of the Andromeda Galaxy (560 words, 1 pages)

ANDROMEDA (M31 or NGC 224) The Andromeda Galaxy, once known as The Great Nebula in Andromeda, is one of the largest members of what is called the Local Group. It is a spiral galaxy closest to our solar system, and is visible as a faint, misty spot in the Andromeda ... Read More

A History of the Acquired Immunodeficiency Syndrome and the Theories on Its Origins (738 words, 2 pages)

AIDS by modest estimation can be characterized as the 21st Century answer to the plague. The question most inevitably arises upon whether or not the virus that causes AIDS, HIV, was man made or a natural outbreak. Religious thinkers point to the ever worsening moral landscape of society that brought ... Read More

Water, the Life-Giving Substance (599 words, 2 pages)

Water is the most important substance in our evolution and our daily lives. Without water, life as we know it would not have been possible. This essay will examine the water molecule in order to ascertain how it brought about Earth's thriving ecosystem and how important it is to us ... Read More

Electric Vehicles for a Cleaner and Brighter Future (4116 words, 13 pages)

As time approaches the 21st century, the automobile has become our major source of mass transportation. Everything about our culture and society has developed around this necessary form of travel. However, along with this necessity comes the issue of pollution to the environment. These great gasoline powered vehicles have contributed ... Read More

The Greek Concept of Atomos and the Role of Atoms in Our Existence (1480 words, 8 pages)

Around 440 BC leucippus of Miletus originated the atom concept. He and his pupil, Democritus of abdera refined it for future use. Their atomic idea has five major points. All original writings of leucippus and Democritus are lost. The only sources we have for there atomistic ideas are inquotations from ... Read More

Description of the Purpose and Operation of a Tesla Coil (1351 words, 2 pages)

PES Physics Information Search A Tesla coil is a device that produces a high-frequency, high voltage current. When working at such high frequencies it can generate spectacular lightning-like discharges in to the air. The most popular use for the Tesla coils has been in the film industry, where they are ... Read More

How Black Holes Are Formed (551 words, 1 pages)

Black holes by supernova Firstly, a black hole isn't really a hole at all, but that's the easiest way to think of its effects on the rest of the universe. Take a star that's at least thirty times larger than our sun and make it explode (called a supernova). Stars ... Read More

A History of the Tyrannosaurus Rex Fossil Named Sue (715 words, 1 pages)

A T. REX CALLED SUE Sue is the largest, most complete, and best-preserved Tyrannosaurus Rex ever found. Fossil hunter Sue Hendrickson discovered the T. Rex in the Badlands of South Dakota. In 1990 Sue Hendrickson was working for a commercial fossil collecting team from the Black Hills Institute at a ... Read More

The Types and Causes of Soil Erosion (2323 words, 5 pages)

SOIL EROSION Soil erosion is a gradual process that occurs when the actions of water, wind, and other factors eat away and wear down the land, causing the soil to deteriorate or disappear completely. Soil deterioration and low quality of water due to erosion and run off has often become ... Read More

An Experiment on How Diet Affects The Growth of Macrobachium Rosenbergii (1967 words, 10 pages)

I. Purpose The purpose of our experiment was to find how diet affects the growth rate of Macrobachium rosenbergii. The two variables included within our experiment were the use of two different food particles protein and fatty substances with a separation net to separate the pairs of shrimp. The goal ... Read More

Benefits and Harms of the Discovery of Cloning (1873 words, 5 pages)

The discovery of cloning can be both beneficial and harmful to society. There are many reasonable methods of cloning. For instance, the use of cloning for medical purposes can be helpful in taking human DNA and creating new body parts. Because of the shortage of donors, this could become a ... Read More

Conjugation: The Reproduction Process of Single-Celled Organism (327 words, 1 pages)

A number of single-celled organisms multiply by conjugation. In this process, which is analogous to fertilization, two similar unicellular organisms fuse, exchange nuclear materials, and then break apart. Each organism then reproduces by fission occasionally, after conjugation, the participating organisms do not reproduce, the process in these instances seeming merely ... Read More

Understanding the Current Flow in the Semiconductor Device (567 words, 2 pages)

A semiconductor device which conducts electric current run in one direction only. This is the simplest kind of semiconductor device, it has two terminals and a single PN junction. One diode can be used as a half-wave rectifier or four as a full-wave rectifier. Electron tube, evacuated glass or metal ... Read More

The Definition, History and Laws of Robotics (742 words, 2 pages)

What Is Robotics The word "robot' was coined by Karel Capek who wrote a play entitled "Rossum's Universal Robots" back in 1921. The base for this word comes from the Czech word 'robotnik' which means 'worker'. In his play, machines modeled after humans had great power but without common human ... Read More

The Use of the Transport Processes of Sedimentation and Electrophoresis to Isolate and Examine Certain Components of Prokaryotic and Eukaryotic Ribosomes (2028 words, 4 pages)

Introduction Transport processes are based on the movement of matter when a force is exerted upon them (1). Diffusion, centrifugation, and electrophoresis are all based on forces causing movement or flow of particles. Diffusion is the migration of particles based on a concentration gradient. Sedimentation and electrophoresis are two transport ... Read More

Life and Works of Primo Levi (1232 words, 2 pages)

Primo Levi born in Turin, a Jew was trained as a chemist. Because of the persecution of Italian Jews, he joined the partisans, with whom he fought until his capture in 1944. He was sent to the Buna-Monowitz concentration camp, where his background in chemistry helped him survive until his ... Read More

The Two Types of Seaweed in Scotland (345 words, 1 pages)

Recently, I interviewed someone from the Island of Orkney, off the northern shore of Scotland. He described the seas as being nutrient rich and crystal clear. Traditionally, sea weed, (called sea vegetables in Scotland) has been used for herbal remedies, food products, animal food, cosmetics, and fertilizers. Two of the ... Read More

Plant Grow Regulator: Methods and Materials (527 words, 1 pages)

Introduction Organic chemicals which are produced by the plant in small amounts act as a plant growth regulator (PGRs). This plant growth regulators do exactly what the name says the regulate the growth of a plant. They also regulate how the plant grows. Plant growth regulators are one chemicals that ... Read More

Metamorphosis in Nature (259 words, 1 pages)

Metamorphosis In biology, striking change of form or structure in an individual after hatching or birth. Hormones called molting and juvenile hormones, which are not species specific, apparently regulate the changes. These physical changes as well as those involving growth and differentiation are accompanied by alterations of the organism's physiology, ... Read More

Plasma Membrane and Homeostasis of Cells (601 words, 1 pages)

9.1 PLASMA MEMBRANE I. All cells must maintain homeostasis in order to live. - they do this by controlling what materials can enter and leave II. All cells have a plasma membrane that is SELECTIVELY PERMEABLE - this only allows for specific things to enter and leave the cell A. ... Read More

Science Essay Examples