Science
The scientific world contains a wealth of knowledge that enables mankind to live the way it does. EssaysForStudent.com can help you close the gaps in your knowledge.
4,609 Essays on Science. Documents 3,931 - 3,960
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The Doctor
The Doctor Here is a film that portrays what happens to one member of the medical community when he faces problems normally confronted by patients. The doctor is a cool, self-centered surgeon who is in total control of his successful life until he is diagnosed as having cancer of the throat. Then he finds himself subject to the negligence, indifference, and humiliations which he has put his own patients through. Over the course of
Rating:Essay Length: 405 Words / 2 PagesSubmitted: June 2, 2010 -
The Dust-Cloud Hypothesis
The universe contains huge clouds made up of very large amounts of dust and gas. About 6,000,000,000 (billion) years ago, one of these clouds began to condense. Gravitation--the pull that all objects in the universe have for one another--pulled the gas and dust particles together. As the dust cloud condensed, it began to spin. It spun faster and faster and flattened as it spun. It became shaped like a pancake that is thick at the
Rating:Essay Length: 282 Words / 2 PagesSubmitted: December 3, 2009 -
The Early Petroleum Industry in the United States
The Early Petroleum Industry in the United States Ancient Egyptians used bitumen for embalming, the Assyrians used it in building, the Chinese for heating and lighting, and for centuries fishermen have used it to make their boats watertight. Naturally, man being what he is, was not content to let well alone, and soon petra- oleum (rock oil) and its associated products were being used in many delightful ways to cripple and annihilate his fellow men.
Rating:Essay Length: 1,802 Words / 8 PagesSubmitted: November 19, 2009 -
The Earth
Chapter 1: The Nature and Method of Economics Econ 10LS Jan. 25th 2006 What is Economics? Economics: Social science concerned with the efficient use of scarce resources to achieve the maximum satisfaction of economic wants Economic perspective Economic way of thinking Economic Perspective Three elements Scarcity (limited) and Choice Opportunity cost Rational Behavior Individuals look for and pursue opportunities to increase UTILITY. Marginalism: Benefits and Cost Decision makers must compare two different options. Example: shopping
Rating:Essay Length: 544 Words / 3 PagesSubmitted: January 27, 2010 -
The Earth Is Infected with Humans
The Earth is Infected with Humans Years of pollution by dumping wastes into the waters and filling the skies with carbon dioxide have had a direct impact on the planet. The Earth is warming at an alarming rate and entire animal ecosystems are being destroyed. Humans have adapted their surroundings to suite their needs instead of adapting to suite their surroundings and by doing so have doomed the entire planet. The most intelligent species on
Rating:Essay Length: 1,173 Words / 5 PagesSubmitted: March 3, 2010 -
The Earthworm...Live Food
The idea of feeding living animals to birds is not new, but only in recent years has it become a trouble-free option for feeding birds in the garden. Mealworms are the usual live food provided, but waxworms can also be bought for this purpose. Neither of these creatures is actually a worm, the first being the larva of the Meal Beetle and the other that of the Wax Moth. Real worms can also be purchased
Rating:Essay Length: 496 Words / 2 PagesSubmitted: January 15, 2010 -
The Ebola Virus
Life is a biological internet in which viruses travel like messages, moving at high speed from node to node and from city to city. They are diverse and wild spread in every plane on the surface of the earth. Ironically, such invisible creatures have a substantially enormous effects on human life and health. In most cases, Viruses are harmful and sometimes deadly. One of these deadly viruses is the Ebola virus, a highly contagious, deadly
Rating:Essay Length: 907 Words / 4 PagesSubmitted: November 11, 2009 -
The Ebola Virus - History Of, Occurrences, and Effects Of
The Ebola Virus History of, Occurrences, and Effects of Ebola, a virus which acquires its name from the Ebola River (located in Zaire, Africa), first emerged in September 1976, when it erupted simultaneously in 55 villages near the headwaters of the river. It seemed to come out of nowhere, and resulted in the deaths of nine out of every ten victims. Although it originated over 20 years ago, it still remains as a fear among
Rating:Essay Length: 1,224 Words / 5 PagesSubmitted: March 3, 2010 -
The Ecology of Eden and the Warming
1.) Give examples of James Burke’s hypothesis that the trajectory of human history has been determined by climate. What assumptions of Burke do you agree with and disagree with? Now give examples of James Burke’s hypothesis that the trajectory of human history in the future will be determined by climate changes caused by human behavior. What assumptions of Burke do you agree with and disagree with? What planet management decisions suggested by Burke do you
Rating:Essay Length: 584 Words / 3 PagesSubmitted: November 25, 2009 -
The Effect of an Indentation on the Behavior of a Termite
The Effect of an Indention On The Behavior of a Termite Introduction: This lab is designed to test whether a termite responds to an indention in the paper. This experiment should show whether a termite uses indentions in surfaces to navigate. It is believed that the termites use indentions in order to navigate the paper. Background: The termite is a blind insect that lives in the ground, or more commonly in wood. They form sealed
Rating:Essay Length: 458 Words / 2 PagesSubmitted: January 25, 2010 -
The Effect of Different Concentrations of Salt Water on the Growth of Bean Plants
The Effect of Different Concentrations of Salt Water on the Growth of Bean Plants Table of Contents Abstract 3 Introduction 4-5 Methods and Materials 6 Results 7 Discussion-Conclusion 8 Literature Cited 9 Acknowledgements 10 Appendix 11-12 Abstract The problem of this project is what is the effect of different concentrations of salt water on the growth of bean plants. The hypothesis for the experiment is that the beans will not germinate and grow as well
Rating:Essay Length: 1,506 Words / 7 PagesSubmitted: February 8, 2010 -
The Effect of Drugs, Toxins, and Other Molecules on Synapse and Synapse Transmission
The effect of drugs, toxins, and other molecules on synapse and synapse transmission. The synapse is the small gap separating two neurons, the presynaptic neuron (neuron that carries the impulse to the synapse,) and postsynaptic neuron (neuron that carries the impulse away from the synapse.) It separates the axon terminals of the presynaptic neuron from the postsynaptic neuron. The synapse is made of three major parts: a presynaptic neuron, a postsynaptic neuron, and a synaptic
Rating:Essay Length: 1,491 Words / 6 PagesSubmitted: November 21, 2009 -
The Effect of Exercise on Heart Rate
The Effect of Exercise on Heart Rate The aim of this investigation is to find out how different types of exercise can affect my heart rate. To measure and record my heart rate, I am going to undergo an experimental test. I am going to do 3 different types of exercise: walking, light jog and lastly hard running. First, I will draw out a table to record my results, and then I will measure my
Rating:Essay Length: 1,262 Words / 6 PagesSubmitted: December 19, 2009 -
The Effect of Nonsteroidal Anti-Inflammatory Drugs on Chick Embryo Fibroblast Cells and Its Relation to Colon Carcinogenesis
The Effect of Nonsteroidal anti-inflammatory drugs on chick embryo fibroblast cells and its relation to colon carcinogenesis Abstract NSAID's are chemopreventive mediators of colon carcinogenesis, although their molecular pathway is unknown. Previous studies suggest that NSAID's best known effect is its inhibition of prostaglandin, a lipid that is derived from fatty acids. To study the effect of NSAID's on chick fibroblast cells, we sought to apply aspirin (a common NSAID) to these cells in
Rating:Essay Length: 1,104 Words / 5 PagesSubmitted: May 13, 2010 -
The Effect of Pesticides on the Embryonic Development of Zebrafish
Abstract The title of my science fair project is The Effect of Pesticides on the Embryonic Development of Zebrafish. My project is about the ways that a common fertilizer can hinder the development in Zebrafish eggs, also known as Danio Rerio. Zebrafish eggs are commonly used in scientific studies for many reasons. One being that their growth process is easier to study because they develop outside of the mother’s body. Another reason is, due to
Rating:Essay Length: 377 Words / 2 PagesSubmitted: January 11, 2010 -
The Effect of Ph and Enzyme Concentration on Enzyme Activity
1. The Effect of pH and Enzyme Concentration on Enzyme Activity 2. Abstract Enzymes help many chemical reactions to occur in living organisms. Enzymes are very specific molecules, each enzyme has a certain type of active site necessary for the reaction to happen. The reactions are very sensitive to changes in pH and enzyme concentration. Changes in the pH can drastically affect the solubility, structure and stability of the enzyme while the enzyme concentration correlates
Rating:Essay Length: 1,289 Words / 6 PagesSubmitted: October 26, 2016 -
The Effect of Ph on a Food Preservative
Experiment One: The Effect of pH on a Food Preservative Organic Chemistry 2401 Lab of 9/13/16 Abstract: Sodium benzoate was manipulated with HCl until a pH level of two or lower was reached. This mimicked an acidic solution found in the stomach and a white insoluble precipitate was separated and gathered. This resulted in sodium benzoate undergoing a chemical reaction that will not dissolve. It is advocated that the substance is benzoic acid. This will
Rating:Essay Length: 1,832 Words / 8 PagesSubmitted: November 15, 2016 -
The Effect of Ph on the Rate of Osmosis Using a Glucose Solution
The Effect of pH on the Rate of Osmosis Using a Glucose Solution Melissa Werderitch Biology 157 11/6/06 Introduction In a journal article written by Florian Lang, osmosis is essentially explained as the flow of water from one area to another that are separated by a selectively permeable membrane to equalize concentrations of particles in the two locations (Lang, 1997). Osmosis is able to maintain osmotic pressure and regulate a cell’s volume. In a hypotonic
Rating:Essay Length: 1,323 Words / 6 PagesSubmitted: November 26, 2009 -
The Effect of Substrate Concentration on the Activity of the Enzyme Catalase
The Effect Of Substrate Concentration On The Activity Of The Enzyme Catalase Aims This is an experiment to examine how the concentration of the substrate hydrogen peroxide affects the rate of reaction of the enzyme catalase. Background Information Enzymes are protein molecules. They are used to speed up specific reactions in the cells. They are all very specific as each enzyme just performs one particular reaction. Catalase is an enzyme found in food such as
Rating:Essay Length: 1,190 Words / 5 PagesSubmitted: December 20, 2009 -
The Effect of Substrate Concentration on the Activity of the Enzyme Catalase
The Effect Of Substrate Concentration On The Activity Of The Enzyme Catalase A Level Biology Project Aims This is an experiment to examine how the concentration of the substrate hydrogen peroxide affects the rate of reaction of the enzyme catalase. Background Information Enzymes such as Catalase are protein molecules which are found in living cells. They are used to speed up specific reactions in the cells. They are all very specific as each enzyme just
Rating:Essay Length: 1,825 Words / 8 PagesSubmitted: February 10, 2010 -
The Effect of Sucrose on Liver Cells
Prediction Osmosis is the “net movement of water molecules from an area of high water potential to an area of low water potential through a partially permeable membrane.” The diagram below illustrates the process of osmosis. (See Figure 1) As shown by the Figure 1, water molecules move from a region where there are many water molecules to an area of less water molecules. This means that in the potato cells, water molecules will move
Rating:Essay Length: 1,104 Words / 5 PagesSubmitted: December 24, 2009 -
The Effect of Temperature on the Activity of Rennin in Milk
Homeostasis is a natural process in the body that regulates the body's internal environment to keep body systems functioning well. For the body cells to survive and function properly, the composition and temperature of the fluids around the cells must remain much the same. An organism is said to be in homeostasis when the internal environment contains the optimal concentration of gasses, nutrients ions and water, at the optimal temperature. Homeostasis is maintained mainly by
Rating:Essay Length: 252 Words / 2 PagesSubmitted: April 26, 2011 -
The Effect of Temperature on the Growth and Survival of Micro-Organisms.
The electrical activity of the heart: the electrocardiogram Electrical activity is a basic characteristic of the heart and is the stimulus for cardiac contraction. Disturbances of electrical function are common in heart disease. Their registration as an electrocardiogram (ECG) plays an essential role in the diagnosis and management of heart disorders. THE GENESIS OF THE ELECTROCARDIOGRAM Pathways of conduction and the electrocardiogram The sinus node is situated in the right atrium close to the
Rating:Essay Length: 310 Words / 2 PagesSubmitted: May 4, 2010 -
The Effect of the Internet on Modern Society
ddaddfsgaThe Effect of the Internet on Modern Society In this day and age, the Internet is the new resource tool for the masses. It has changed the way we live in society and the way people interact with each other. As more and more people log on the Internet, it has undoubtedly changed the way people think and feel about each other and the world around us. When we begin to look at the ways
Rating:Essay Length: 359 Words / 2 PagesSubmitted: December 5, 2009 -
The Effects of Altitude on Human Physiology
Changes in altitude have a profound effect on the human body. The body attempts to maintain a state of homeostasis or balance to ensure the optimal operating environment for its complex chemical systems. Any change from this homeostasis is a change away from the optimal operating environment. The body attempts to correct this imbalance. One such imbalance is the effect of increasing altitude on the body's ability to provide adequate oxygen to be utilized
Rating:Essay Length: 4,119 Words / 17 PagesSubmitted: January 15, 2010 -
The Effects of Concentration on Osmosis
Introduction: This experiment was used to examine the hypothesis that: Osmosis is dependent on the concentrations of the substances involved. Diffusion is the passage of solute molecules from an area of high concentration to an area of low concentration (Campbell & Reece, 2005). An example is ammonia diffusing throughout a room. A solute is one of two components in a chemical solution. The solute is the substance dissolved in the solution. The solvent, the other
Rating:Essay Length: 562 Words / 3 PagesSubmitted: December 1, 2009 -
The Effects of Cryptic Versus Non-Cryptic Eggs on Predation Rate of Ground-Nesting Birds
The Effects of Cryptic versus Non-cryptic Eggs on Predation Rate of Ground-nesting Birds BSC2011L Title Determining the effect of cryptic, brown eggs versus non-cryptic, white eggs on the predation rate of ground-nesting bird species. Abstract Various interactions occur between organisms. Predation is a crucial interaction in which one species benefits by consuming another. I conducted this experiment to determine if crypsis affected the predation rate of eggs in ground-nesting birds. I hypothesized that cryptic eggs
Rating:Essay Length: 1,127 Words / 5 PagesSubmitted: March 8, 2010 -
The Effects of Different Wavelengths of Light on the Rate of Photosynthesis
The effects of different wavelengths of light on the rate of photosynthesis Introduction This experiment was performed to investigate the effects of different wavelengths of light on the rate of photosynthesis. If a multiple colored film petri dishes are place under a 50 watt lamp, then the rate of photosynthesis will be greater for those with red, blue and clear film, than those with green and black film. We believed the petri dishes with the
Rating:Essay Length: 1,002 Words / 5 PagesSubmitted: December 10, 2009 -
The Effects of Environmental Factors on the Absorbance of Escherichia Coli
Introduction In this experiment, the gram negative bacterium Escherichia coli is being subjected to various environmental factors that affect the rate of growth. These factors scrutinized were the different types of nutrients, the intensity of aeration, or the temperature at which it was stored. The purpose of this lab is to determine which factor affects the Escherichia coli the greatest. It is known that these abiotic factors affect the rate of growth the greatest if
Rating:Essay Length: 1,662 Words / 7 PagesSubmitted: December 11, 2009 -
The Effects of Ephedra and Ephedrine Alkaloids in Weight Loss and Fitness
The Effects of Ephedra and Ephedrine Alkaloids in Weight Loss and Fitness With the rise in obesity consciousness and the desire to lose weight rapidly a wide array of dietary supplements have flooded the market over the past few years. Many of these pills, powders and drinks promise accelerated weight loss and increased energy and health without the need for much in the way of diet or exercise. One of the main ingredients of many
Rating:Essay Length: 1,043 Words / 5 PagesSubmitted: November 15, 2009