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Science Essay Examples

Effect of Concentration on the Rate of Reaction

Introduction: In this experiment, we utilized the ability for the iodide ion to become oxidized by the persulphate ion. Our general reaction can be described as: (NH4)2S2O8 + 2KI A I2 + (NH4)2SO4 + K2SO4 (1a) However, we know that in an aqueous solution, all of these compounds except iodine will dissociate into their ionic…

Parallel Forces Physics Lab

Parallel Forces Objective: Find FA and FB on the apparatus which are parallel to both Fulcrum A and B. Calculations: Theoretical FB ?? = 0 +FB 0. 5 – (0. 1kg x g x 0. 1m) – (0. 2kg x g x 0. 4m) – (0. 05kg x g x 0. 7m) – (0. 1kg…

Essay on Science Has Made Man's Life Quite Comfortable

Science Has Made Our Life Comfortable Science has changed the face of the world. It has, of course, given many things that benefit man. But the evils that it has showered on man wash away the advantages. It has made man depend on machines, calculators and computers. A day may come when his physical and…

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Ecosystems: Ecological Succession and Climatic Climax

Ecosystems: Change and Challenge The Structure of Ecosystems Ecosystem: a dynamic, stable system characterised by the interaction of plants and animals with each other and with the non-living components of the environment The components of an ecosystem are categorised as either biotic and abiotic Biotic means the living environment, components include: i). Vegetation (living and…

Calcium Carbonate and Ca2+ Ions

Experiment. EDTA Titration of Ca2+ in an unknown solution Experiment. EDTA Titration of Ca2+ in an unknown water sample Modified 9/2012 Objective: The most common multivalent metal ions in natural waters are Ca2+ and Mg2+. In this experiment, you will find the total concentration of calcium ions that can react with EDTA with the assumptions…

Osmosis: Sodium Chloride and Onion Cells

Osmosis/Plasmolysis Lab Name: Problem: How do solutions of various salt concentrations influence osmosis in relation to an onion cell? Materials: (per student group): red onion epidermis forceps, dropper distilled water NaCl solution paper towels microscope slidecover slip Procedure 1. Make a wet mount of the red onion epidermis. 2. Examine under low power. When you…

Body Systems of Humans, Crayfish, Pigs, and Earthworms

Body Systems of Various Organisms All organisms in the world have a range of systems and organs in their body. Some organisms may share similar body systems while others have absolutely nothing in common. Several of those organisms include humans, pigs, crayfish, and earthworms. From their mushy, gushy organs to their soft, gentle skin, you…

Dna Transcription, Translation Quiz Study Guide

Study Guide 3/1/11 1. Describe the three parts of a nucleotide and how they bond to form a nucleotide. The three parts of a necleotide are a carbon sugar, a phosphate group and a nitrogenous base. The carbon sugars bond to the phosphate groups by covalent bonds while the nitrogenous base bonds with it’s compliment…

Biology Virtual Lab- Parts of a Flower

Tip of the stamen that produces pollen containing sperm| Filament| Slender stalklike part of the stamer that supports the anther| Ovary| Swollen base of the pistil that contains the ovules| Ovule| eggs that develop into seeds after they are fertilized| Petals| Colorful leaflike parts that attract insects and other animals for pollination| Pistil| Structure that…

Human Homeostasis Gizmo

Gizmo Warm-up To survive, an organism must be able to maintain stable internal conditions in a changing environment. This process is called homeostasis. The Human Homeostasis Gizmo™ allows you to explore how the human body stays at a nearly constant temperature in different conditions. Notice the Air temp. and Body temp. thermometers representing the air…

A Guaiacol Dye-Coupled Reaction Reports That Catalytic Activity of Peroxidase Isolated from Fresh Turnip (Brassica Rapa) Increases as Temperature Rises

Enzymes are proteins which serve to reduce the activation energy required for biological reactions (Russell and others 2010). This allows biologically important chemical reactions to occur rapidly enough to allow cells to carry out their life processes (Russell and others 2010). Enzymes are made of one or more polypeptide strands, which individually or as an…

To Determination the Partition Coefficient of Ethanoic Acid Between Water and Butan-2-Ol

To determination the partition coefficient of ethanoic acid between water and butan-2-ol. Procedure 1. The room temperature was recorded. 2. 15cm3 of the given aqueous ethanoic acid and 15cm3 of butan-2-ol were poured into a 100cm3 separating funnel, using suitable apparatus. The funnel was stoppered and was shook vigorously for 1 to 2 minutes. (The…

Mintzberg's Hypothesis for the Design of Organizational Structure

The efficient design of structure of any organization requires the analysis involving some parameters and hypothesis. The main factors presented by MINTZBERG with the respective hypotheses (from H1 to H16) associated to the organizational configurations structures are the following: – Related to the age and size of the organization. H1: How much older, more formalized…

Phase Equiliubrium of Naphthalene and Biphenyl Mixture

Abstract Thermal analysis of a solid-liquid phase using cooling curves at various compositions is a method used to obtain the eutectic composition and temperature of naphthalene-biphenyl. The XE was 0. 45 and the TE was 310. 3K these are slightly different from the theoretical values which are 0. 44 and 312K respectively. Results The cooling…

Women’s Brains

Women’s Brains by Stephen Jay Gould discusses how inferior women are to men, based on scientific data. George Eliot, in the prelude of Middlemarch, grieved over the unfulfilled lives of talented women. She wrote in 1872 that the leaders of European anthropometry or measurement of the human body, scientifically measured the inferiority of women. But…

The Evolution of Birds

All animals need to be adapted for travel in their environment… [L]and animals need bones strong enough to lift their body off the ground as they move. Birds have to overcome gravity altogether to fly, and their adaptations emphasize strength and lightness. Their bones are hollow, but strong enough to support the muscles attached to…

Solvent and Double Bond

Theory and mechanism Epoxidation is a reaction of an alkene with a peroxycarboxylic acid (also called peracid) to produce an epoxide product, generally performed in inert solvents, such as dichloromethane. The epoxide product is a cyclic ether in which the ring contains three atoms. The alkene gains an oxygen from the peracid in a syn…

Cell Physiology

Describe two variables that affect the rate of diffusion: Two variables that affect the rate of diffusion are size and concentration gradient. The molecular size vs the MWCO size of the membrane can either increase, decrease, or prevent diffusion. The greater the concentration gradient the greater the diffusion rate due to molecules moving from areas…

X-ray interactions with matter

This document presents the interactions of x-ray with matter. It talks about the five types of x-ray interactions with matter, photoelectric absorption, compton scattering, pair production, coherent interaction, and photodisintegration. Each of this x-ray interactions are discussed in a manner that it can be understood by the general public. This document also dwells on the…

Advantages and Disadvantages of Space Research

Space research has many advantages and disadvantages. Some of the advantages are that many discoveries have been made due to space research. This knowledge can help us become a more developed society and it helps the economy. Space research can benefit us by discovering technology that will help us with our lives. Technologies have been…

Clara Y Lim-Sylianco

Dr. Clara Lim-Sylianco is a Filipino scientist known on her works on mutagens, anti-mutagens, and Carcinogenic chemicals found in various fruits and vegetables. She also authored schoolbooks that are still makes use in schools nowadays. She received the Gregorio Y. Zara award in 1979; she also served as the UP Endowment Professorial Chair in chemistry…

Phytochemical Analysis of Amaranthus Viridis L.

A Biological Research Submitted to the Research Center Alabel National Science High School Regional Science High School for Region XII Alabel, Sarangani Province Submitted by: Shaira Mae M. Yamon Fourth Year- Diamond Submitted to: SHIELA P. BUTIL, Ph. D. Research Adviser August 5, 2013 ? Chapter I Introduction A. Background of the Study Amaranth (Amaranthus)…

Whale Rider Chapter Questions

Chapter 1 begins in myth, and myths explain what was once unexplainable to a people. What does the myth of the whale rider explain to the Maori people? 2. Chapter 2 gives us the point of view of the whales. The bull whale remembers his master, the “golden man. ”  Do you think that the…

Dual Coding Theory

The mind can perform different kind of processes ranging from verbal up to non-verbal processing and other different processes. Performing different processes has made different studies on how our mind really works. However, since the mind is too complex to be the focus of a study, many researchers resorted to studying the processes that the…

Introduction to Flood Routing

The Muskingum flow routing method has been very well researched and established in the hydrological literature. Its modest data requirements make it attractive for practical use. The paper gives a general overview of the Flood routing concept and types, and then goes on to explain the Muskingum method in detail. Introduction to Flood Routing Flood…

Procedure for applying Muskingum Method

For Muskingum method which is a hydrologic method, the discharge measurements alone are sufficient for routing. This is because it is assumed that the parameters of the Muskingum model capture the combined flood-propagating characteristics of a river reach. When the water resources schemes to be built are in their initial planning stages, the river gauging…

Reaction of Butanols with Hydrobromic Acid

For this experiment our primary goal was to observe and note the reaction of butanols with hydrobromic acid. Before the lab began we discussed and proposed mechanisms. (see “Mechanisms”) To begin this experiment we calculated how much of each material we were going to be using, and the numbers we chose to use differed from…

Investigation on Effects of DOPA pH on Enzyme Activity

How do the different pH buffers affect activity of potato enzyme/extract? Introduction: Proteins are polymers that are made up of smaller units/monomers called amino acids. There are 20 different types of amino acids, thus make up many different combinations in types, numbers of amino acids as well as their orders – an explanantion for why…

bio lab pill bug

What are the Effect of Different Environments and the Movement of Pill Bugs? Purpose: The purpose of this lab was to analyze pill bugs activity in different environments and determine the effect of wet/dry or dark/light environments have on them and how taxis takes place in their choices in living in areas. Background information: Terrestrial…

Heat Engine Lab

Heat engine lab Intro: when an engine runs, it pumps pistons that move up and down and provide energy to the engine to it to go. These pistons move because of pressure and heat. This work done on the system is not only mechanical but its also thermodynamic. When a piston undergoes one full cycle…

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