Science Essays Examples For College & High School Students in PDF

14278 total results

An Experiment on the Loss in Mass of the Anode When a Copper Sulfate Solution Is Electrolyzed (3200 words, 7 pages)

Investigate the loss in mass of the anode when a copper sulphate solution is electrolysed These are the input variables that I believe could affect this investigationSurface area of electrode Temperature of electrodeTimeCurrentMolarity of copper sulphate solution Outline planI have chosen to investigate the variable of current, and its effect ... Read More

An Analysis of the Nichrome and If It Can Be Determined Using an Equation (1108 words, 3 pages)

A. Planning Plan of the method to be used - The resistivity of nichrome can be determined using the equation ???RAL WhereR- Is the resistance of the wire in ?ohms and can be determined using the equation RVI where V is voltage in volts and I is current in amperes. ... Read More

An Introduction to the Many Factors of Investigation Planning (1248 words, 6 pages)

Investigation PlanningThe aim of my investigation is to find out how the concentration of an acid affects the rate of reaction on marble chips.The factors which might affect how well the investigation will work areh The temperatureh The concentration of the acidh The surface area (size of the chips)h Adding ... Read More

An Analysis of Planning Aim (627 words, 1 pages)

PLANNING AIM To find if changing changing the concentration of an acid will increase or decrease the rate of the reaction when marble is dissolved in hydrochloric acid. With the equation CaCO3 2HCl CaCl2 H2O CO2 HYPOTHESES A reaction occurs when particles collide. This process is based on random particle ... Read More

An Introduction to the Experiment to Measure the Earth’s Gravitational Field Strength (3364 words, 5 pages)

AimThe aim of my experiment is to measure the earths gravitational field strength, which is also the acceleration due to gravity. This involves mass, which is the amount of matter an object contains and weight which is the force of gravity pulling down on a object with a mass. Mass ... Read More

An Investigation into How the Amount of Oxygen Is Produced by Changing One Variable Effect (2150 words, 5 pages)

An investigation into how the amount of oxygen is produced by changing one variable effects the decomposition of Hydrogen Peroxide in the presence of the enzyme. Hydrogen peroxide Water Oxygen2 H2O2 2H2O O2 This shows us that when the H2O2 has reacted with the catalyst this is what it produces. ... Read More

An Introduction and an Analysis of the Static Electricity (474 words, 2 pages)

Introduction Electric charge on an object is often called static electricity.Objects charge up because they gain or lose electrons. The electron is the smallest part of the atom.The electron carries a fixed negative charge. Every atom has a positively charged nucleus surrounded by electrons. An atom is uncharged because it ... Read More

An Experiment to Determine the Effects of an Enzyme’s Concentration on the Breakdown of Starch (2224 words, 4 pages)

For this investigation I am going to investigate the effect of the concentration of an enzyme, in this case Amylase, on the time taken for the enzyme to fully breakdown the substrate, which in this case is starch. The reason why these two enzymes have to be used is because ... Read More

The Effects of Caffeine and Temperature on the Heat Beat and the Daphnia’s Lifespan (4729 words, 13 pages)

Plan The initial variable to be considered will be the effect that caffeine and temperature has on the heart beat and if it has a direct or indirect effect on the daphnia's lifespan. If there is enough time to consider a second variable however, the effects of a temperature or ... Read More

An Analyis of the Resistance of a Wire and the Way It Can Be Affected by Certain Factors (834 words, 2 pages)

Planning - The resistance of a wire can be affected by certain factors Length of wireCross sectional areaType of metalType of wireTemperature I chose to investigate how length affects the resistance in a wire. This means that the other factors (variables) must be controlled. This means I must keep the ... Read More

An Introduction to the Origin of Humanity: The Fact of Evolution (374 words, 1 pages)

"The Origin Of Humanity We live on a planet believed to be 4.5 billion years of age with millions of people covering all parts of it. Where did they come from? Did the whole human population originate from one of people or were we placed here and then improved or ... Read More

An Introduction and an Analysis of the Organism Adaptation (2192 words, 3 pages)

Organism Adaptation 5-4-1993 1)stimulus a change in the environment that necessities a response, or adjustment by an organism (ex. swirling dust) response the adjustment or change you make to a stimulus (ex. blinking your eyes) 2)Protists respond to a negative stimuli by moving away from it. Protists respond to light, ... Read More

A Review of Lambert Titus Parker’s Literature “Hypogravitational Osteoporosis” (1419 words, 2 pages)

Your Bones in Space ASTRONOMY AND SPACE SCIENCE ------------------------------------------------------------------------------ Hypogravitational Osteoporosis A review of literature. By Lambert Titus Parker. May 19 1987. Osteoporosis a condition characterized by an absolute decrease in the amount of bone present to a level below which it is capable of maintaining the structural integrity of ... Read More

An Analysis of the Payphone Problem and the Formula for Different Combinations (914 words, 10 pages)

"The Payphone Problem" Introduction This coursework is about finding all the possible combinations for putting in toPayphones various different coins and using those results to try to find a Formula thatWorks so you would successfully be able to predict how many coins you would have to Put in the payphone ... Read More

Determining the Resistance of Nichrome Using an Equation (1108 words, 3 pages)

A. PlanningPlan of the method to be used -The resistivity of nichrome can be determined using the equation ???RALWhereR- Is the resistance of the wire in ?ohms and can be determined using the equation RVI where V is voltage in volts and I is current inamperes.L- Is the length of ... Read More

An Introduction to the Effect of Osmosis on Potato Chips (3122 words, 11 pages)

PlanningWe have been asked to investigate the effect of osmosis on potato chips. Osmosis is the diffusion of water from a lower concentration of solute to a higher concentration of solute, through a membrane. I have chosen to investigate the effect of the water potentialconcentration of solution on potato chips. ... Read More

An Experiment to Determine the Effect of Insulation on the Transmission of Heat (1007 words, 16 pages)

Planning Experimental Procedures - Effect of Insulation on the Transmission of Heat - Preliminary work - ? I have done an experiment on the effect of Radiation on two different types of surfaces. I used two boiling tubes, one with a silvered surface and the other with a blackened surface. ... Read More

Measuring the Reaction of Magnesium to Different Elements (884 words, 4 pages)

BackgroundKnowledgeProblem In my garden I have a metal statue made of an alloy. Which consists of mainly magnesium. I have noticed that during the year it corrodes at different rates. I will now devise an experiment to investigate the causes of this problem.The reactions of magnesium with certain elements are ... Read More

An Experiment on the Reaction Between Hydrochloric Acid and Magnesium Ribbon (807 words, 3 pages)

In the reaction between hydrochloric acid and magnesium ribbon, the hydrochloric acid will dissolve the magnesium and produce hydrogen gas. All chemical reactions involve reactants which when mixed may cause a chemical reaction which will make products. In my experiment the reactants are hydrochloric acid and magnesium ribbon. The chemical ... Read More

An Introduction to How Substrate Hydrogen Peroxide Affects the Rate of Reaction of the Enzyme Catalase (1223 words, 4 pages)

AimsThis is an experiment to examine how the concentration of the substrate Hydrogen Peroxide (H2O2) affects the rate of reaction of the enzyme Catalase. Background InformationEnzymes such as Catalase are protein molecules, which are found in living cells. They are used to speed up specific reaction within the cell. They ... Read More

An Analysis of the Topic of Investigating Electrolysis of Sodium Solutions for Gases (1052 words, 3 pages)

AimIn this experiment we will be investigating electrolysis of sodium solution for gases. The variable I will be investigating will be the current of the circuit.MethodThe apparatus I will be using is - Dilute sodium sulphate solution (0.1 M), stop clocks, leads, croc clips, measuring cylinders, ammeter, plastic cup electrolysis ... Read More

An Experiment to Determine the Number of Atoms Given by the Amount of Heat in Alcohol (2295 words, 10 pages)

Alcohols are very similar to alkane and alkenes. Alcohols are a family of related compounds- a homologous series. Each member of the series has the O-H group in its molecule. The general formulas for alcohols is CnH2n1OH, where n is the number of carbon atoms. Here are a few examples ... Read More

An Experiment Determining the Rate of Reaction Between Marble Chips and Hydrochloric Acid (2455 words, 7 pages)

IntroductionThis chemistry investigation was performed to investigate the rate of reaction between Marble Chips (Calcium Carbonate - CaCl ) and Hydrochloric Acid (HCL). In this investigation I want to find out whether the concentration of Hydrochloric Acid effects the amount of Carbon Dioxide being given off when the acid is ... Read More

An Experiment to Determine the Rate of Reaction Between Hydrochloric Acid and Sodium Thiosulphate (2378 words, 6 pages)

PlanningThis investigation is about rates of reaction and what affects them. In this case I am going to look at hydrochloric acid and sodium thiosulphate which is a precipitation reaction. They react as in the equations belowsodium thiosulphate hydrochloric acid - sodium chloride sulphur sulphur dioxide waterNa2S2O3(aq) 2HCl(aq) - 2NaCl(aq) ... Read More

An Experiment to Determine Factors Affecting the Rate of Cooldown of a Hot Drink (976 words, 4 pages)

Aim To investigate the factors that effect the time it takes for a hot drink to cool down. Equipment Cans to hold the hot water,Measuring cylinders,Lids,Bubble wrap plastic,Stopwatches,Rulers,Kettle,Digital Thermometers andRegular Thermometers. Variables and Factors The factors that could have effected the cooling time of the water, were The temperature of ... Read More

An Experiment Investigating the Boyle’s Law (436 words, 2 pages)

Introduction This group experiment was to investigate Boyles Law. It was named Boyles Law, after Robert Boyle, who made the discovery. The experiment involved compressing a certain amount of air molecules into a smaller space. The way to do this is to trap the air in between the top end ... Read More

Understanding and Analyzing the Three Types of Free Fall (1357 words, 2 pages)

Falling Ball Investigation - Planning There are three types of free fall Vertical Free Fall Projectiles Satellite Motion I shall be investigating the first type, vertical free fall. Objects fall because of the earth's gravitational pull on them. This force of gravity was discovered by sir Isaac Newton in 1642. ... Read More

An Experiment to Determine the Burning Characteristics of Alcohols (2377 words, 15 pages)

IntroductionAlcohols belong to the general family of compounds whose molecules are based on chains of carbon atoms. These substances differ from all other organic compounds in that their molecules contain at least one oxygen atom joined to a carbon atom solely by a single bond. In alcohols this oxygen is ... Read More

An Experiment Determining Osmosis in Potatoes With Variance of Sucrose in Water (2898 words, 8 pages)

Aim My main aim in this experiment is to find out if osmosis occurs in a potato, and how it affect the potato in different molar solutions of sucrose and water.Apparatus6 petri dishes for all of the six solutionsMarker pen to label the petri dish, just in case of a ... Read More

An Experiment to Determine the Effects of an Acid’s Concentration on Heat Produced in Neutralisation (1048 words, 5 pages)

The Problem We are trying to find out whether the concentration ofacid affects the heat produced in neutralisation.Background Knowledge The knowledge I know that will be relevantto the experiment is-Neutralisation always produces a saltAn alkali can neutralise acidAlkali's are not the only compounds that can neutralise acidsWhen acids and alkalis ... Read More

Science Essay Examples