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Science Essay Examples

Surface area of calcium carbonate

Introduction: The experiment taking place is between calcium carbonate [CaCO3] and hydrochloric acid [HCl]. Calcium carbonate, also known as marble, is a metamorphic rock. This is a rock that is formed over long periods of time under high temperature and pressure. It is also formed when carbon dioxide reacts with calcium hydroxide to produce calcium…

Factors affecting Osmosis in Potato Tissue

We will connect the calibrated gas syringe to the side armed flask. We will place the strip of magnesium ribbon into the side armed flask at the same time as putting in the bung and starting the stop clock. We will time how long the reaction takes until it is stopped and record the results….

Moon Landing exercise

Moon Landing Exercise What went well and what are areas of improvement? The team performance on Moon landing exercise was much better than the individual performance which was the first thing that went well as a group. The learning from this task was, “for complex task there is potential for better results with team”. Also…

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Chromatography and Solvents

Chromatography is a method of separating compounds and mixtures so that they can be identified and analyzed. The word chromatography means color writing. There are many kinds of chromatography such as the thin layer chromatography, Partition chromatography, Column chromatography, and Paper chromatography. Chromatography is important in the analysis of processes and materials such as environmental…

The length of Pencil lead affect Its Resistance

Aim: The aim of this piece of course work is to find out how does the resistance of a pencil lead changes as I increase its length. And to find out what is the relationship between the length of a pencil lead and its resistance. Safety: Safety is a very important thing to consider as…

Specific heat capacity is ethanol

The three variables that affect the specific heat capacity of a substance are:  emperature change (K) or ( c) The equation that is used to determine the specific heat capacity of any substance is; Specific Heat Capacity = Energy Supplied ( Q) (C) Mass (kg) Temperature Change ( ) Unit: Jkg- K- Each different substance…

The reaction between zinc and copper sulphate

To investigate the affect of varying the amounts of zinc in the reaction between zinc and copper sulphate has on the rate of reaction. Background Knowledge My experiment is based on the theory of: ‘A more reactive metal can displace a less reactive metal from a compound’ For examplThis type of reaction is known as…

The heat energy produced by propanol

The energy released by a fuel depends on two things. Firstly the number of bonds to be broken and made and secondly the type of bonds involved. Therefore from the preliminary work I can see that propanol has similar type bonds to ethanol, but it has more of them. This means that proponal will use…

Food Web Case Study Essay

A nutrient web is a type of graph that depicts the relationship between the quarry and the marauders. besides known as a system of nutrient ironss and how one another are related. This can be better explained as a connexion in a community. Food webs are of import because it is a direct illustration of…

Magnesium oxide

I can’t have only 1 point connecting to zero to make a line of best fit because it would not be a very reliable line. Analysis The type of graph I have is as straight line in a positive correlation. The results are directly proportional which means as the mass of magnesium goes up, the…

Measuring the specific heat capacity of water

Introduction The Specific Heat Capacity of any substance can be defined as the amount of energy needed to raise 1kg of the substance by 1i?? c. It’s found by using the following formula: C = Q / (M x ? ?) Where (C) represents the SPHC; (Q) the energy needed or given out in joules;…

Ohm's law

In this investigation I want to find out how the length of and the width of the wire affects the resistance. Resistance: An explanation of what resistance would be that resistance is the opposition of a conductor to a flow of current. It is when traveling electrons in a wire collide with the atoms of…

Resistance of a nichrome wire

Introduction In this piece of coursework I aim to find the effects of length on a piece of nichrome wire. Resistance is a force which opposes the flow of an electrical current, this is why energy is needed to push the particles around. The circuit also contains its own resistance if the wires vary in…

The reading of the ammeter

To find out how the length of a wire affects its resistance. Introduction- Metal is a good conductor of electricity. This is because their atoms contain small negatively charged particles called electrons. Some of these electrons are not fully attached to their atoms. This means that they can be easily detached and made to flow…

The resistivity of Constantan

The resistance of a piece of wire is dependant on its length, cross-sectional area and the type of metal the wire is made of. The resistance of a given wire can be calculated using the following equation: R = ? L / A where: L = Length (m) A = cross-sectional area (mi?? ) ?…

Thermal insulators

To investigate different materials for the most effective thermal insulator for a house. Introduction Heat transfer is the gain and loss of energy. There are three ways in which thermal energy can be transferred:  Conduction  Convection  Radiation Conduction – this is when energy travels from molecule to another. When one molecule receives energy it begins…

The hydrogen peroxide

The substances that I am going to use in this investigation are Manganese Dioxide and Hydrogen Peroxide. The Manganese Dioxide is a chemical catalyst and will be used to speed up the breaking down of Hydrogen Peroxide. I am using a chemical catalyst because it would give a more accurate result compared to organic or…

The Effects of Visual Distraction on Reaction Time

Overall, distraction can affect human reaction time and this coincides with previous findings (Lee et al 2001). Introduction Human reaction time can be affected by many factors, one such example is distraction. Literature suggests that distraction can affect a person’s ability to react to a particular stimulus, In the sense that it increases the reaction…

Areas of Knowledge: Invented, Discovered, or Both?

Areas of Knowledge: Invented, Discovered, or Both? One cannot say with certainty that specific areas of knowledge are invented nor can one say with certainty that areas of knowledge are discovered. Two areas of knowledge that deal with this topic are mathematics and natural science. In my opinion, I believe that mathematics is an invented…

Boiling Water, Condensation and Dissolving.

“The purpose of teachers’ questions should be to promote children’s activity and reasoning” (up 41 ) which Is why It Is up to the teachers of today to establish an understanding of the different sorts of questions that can be used to get different sorts of responses from the children that would Initiate participation In…

Septic Shock

In this essay septic shock and Its complications will be analyzed wealth the Immunological, gastrointestinal, cardiovascular, respiratory and renal (Including the acid-base) systems. This essay will contain the general discussion of homeostasis and will study the homeostasis responses to septic shock In each system. Sepsis and Septic Shock sepsis may be defined as the state…

Drosophila Melanogaster

Drosophila melanomas are most commonly known as fruit flies and are used in many genetic studies for a few simple reasons; they are small and easily handled, they have a short life cycle and they are easy to keep large numbers such as the confined spaces of a laboratory or classroom. 1] Drosophila also have…

Personal Statement for Chemical Engineering

The world hasn’t been connected ever so strongly before than today as the planet earth has turned out to be a global village and people are trying their best to go beyond and further. I want to be a part of this ever growing world and think the best way to discover more of It…

Biogeochemical Cycles

Take the hydrological cycle, for example, and throw in an area of heavy pollution and we are bound to get a reaction a lot like throwing tennis balls In a dryer. While you might have harmless Intentions. It makes a lot of noise and causes a lot of damage. The biochemical cycles consist of the…

Physics

What is science? Science is a body of knowledge that is ever changing. It is made up of not only facts but also theories that are made up of well-tested hypotheses. 2. Dullness’s among the scientific fact, hypothesis, law and theory As stated above, a theory Is made up of well-tested hypotheses, which In themselves…

Nature, Nurture, and Human Diversity

What makes you, you? Is who we are the result of our genes (nature) or is it the result of our upbringing (nurture)? Nature: the result of our genes Nurture: everything else other than genes, the culture you were brought up in, the country and family you were brought up In, the school you went…

Acids, Bases & Buffers

To measure the buffering capacity of two types of Isotonic drinks. Introduction: There are acid-forming. Basic forming and neutral food, however the acid or alkaline properties of a food is unable to judge by the actual acidity of the food itself. For example, citrus fruits such as lemon are acidic, but they are alkaline-forming when…

The study of a panda

The panda is black and white, like a bear in shape, but different. Things to remember in the last hour before the exam: Life processes at the cellular level (This is not a revision sheet – you’ve done that by now – It’s a list of things you might want to remind yourself about 1….

The Pygmy Chain Sword Plants

Understanding the process of photosynthesis is also vital in other areas, such as medicine, agriculture, energy production, and even electronics. In medicine, since light has extremely high energy content, sometimes it can cause damage to living organisms such as skin cancer and skin aging. To combat the high-energy content, plants developed photoprotective mechanisms to limit…

Daphnia magna

This chapter provides an overview of the biology of waterless of the genus Daphnia. It describes basic aspects of Individual physiology and nutrition, Including some remarks about Immunity. It summarizes the typical life cycle and development of Daphnia. The modes of reproduction and the induction of resting egg production in cyclic and obligate parthenogenesis forms…

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