Science Essays

The sun is the originator of solar energy, which serves as Earth’s primary source of power. By utilizing matter’s position and movement in conjunction with acting forces, this energy causes noticeable alterations to ocean currents and weather patterns while heating up the planet’s surface. There are different types of energy, including mechanical, thermal, chemical, electrical, […]

AIMS The aim of this experiment was to investigate the effect of temperature rise on the rate of transpiration of a plant (hibiscus) by measuring the plant’s water uptake in a period of time. HYPOTHESIS Transpiration is the process by which plants loses water to the atmosphere from their leaves. Water in the plant is […]

“Greenfreeze” is a tale about the collaboration between Greenpeace and DKK Scharfenstein, an East German company with a long-standing production of refrigerators. In the spring of 1992, the two parties combined efforts, bringing together scientists specialized in propane and butane refrigerants. At that point, DKK Scharfenstein was facing perilous financial difficulties and was on the […]

Chapter 28: Nitration of Methyl Benzoate I. General Information: Microscale Nitration of Methyl Benzoate May 17, 2008 Reaction(s), including molar masses and all relevant physical data Mechanism for the nitration of chlorobenzene: II. Purpose: In this experiment we are to take a cold solution of an aromatic ester that is first dissolved in sulfuric acid […]

Analysis & Discussion The primary objective of this investigation was to test ultraviolet radiation as an alternative disinfectant for Acanthamoeba in its more resistant cyst form. A previous study had already shown that multipurpose solutions were ineffective compared to hydrogen peroxide based systems at eliminating Acanthamoeba trophozoite contaminations. 5 This was a follow-up to that […]

Aim: To react NaHCO3 with HCl to form NaCl and two other products and then calculate the mole relationships between NaHCO3 and NaCl and calculate a balanced equation for this reaction. Safety: •Wear safety goggles at all time •Handle all chemicals with care •Use equipment like tongs when handling warm/hot objects •If chemicals are spilt […]

INTRO: Cellular respiration is a process that happens in all living eukaryotic cells. What cellular respiration does is turn food often carbohydrates into energy for our bodies. Cellular respiration starts with a carbohydrates sugar called glucose. What it does is alter and break down the six carbon molecule glucose and altering it creating two three […]

Counter-strike: Grab A Weapon, There Is Work To Do Intro Never before has a multiplayer game blended all elements of true competition and sweat-soaked shirt anxiety as well as Counter- Strike. Counter-Strike is a tactical first-person shooter video game which is based on a team of counter terrorists against a team of terrorists battling in […]

The Chemistry of Natural Waters Introduction: Four different taps will be used to collect water samples. The first is located in the West Residence Halls at Hamilton Hall while the second is located in the East Residence Halls at Bigler Hall. The third water sample will be collected from University Towers situated on College Avenue […]

Aim: to investigate the factors affecting cell membrane permeability of red cabbage, using absolute alcohol (10 cm3), 1 M hydrochloric acid (10 cm3), 1M sodium hydroxide (10 cm3), and distilled water (10 cm3), and change of temperature (40 oC, 65 oC, 100 oC)Hypotheses:If the leaf discs are not rinsed, the distilled water will change colour, […]

The objective of the experiment is to determine the effectiveness of air as an insulator. There are three types of heat transfer: Conduction, Convection, and Radiation. Conduction is particularly common in metals, where increasing temperature causes ions to vibrate and gain kinetic energy. This energy then transfers to cooler parts of the metal where free […]

Leaves are made up of several different layers of cells, which are very complex. They all have different functions. Leaves differ from one plant to another. Some may be very large, while some may be small. There could also be a difference in texture, colour and shape. Some leaves may also appear more turgid, while […]

‘Enzymes are special kinds of proteins that are found in all living matter. Living cells need enzymes to live and grow. Enzymes are catalysts, substances which speed up chemical reactions present in very small amounts without being changed in the reaction’ [1] .It was firstly named enzyme by a German physiologist, Wilhelm K�hne in 1878. […]

Collect all of the apparatus needed for the experiment Fill trough and collection tube with water (Make sure that you are wearing an apron and safety goggles) Set up apparatus as shown on the above diagram Place the pondweed in the test tube and add sodium hydroxide Put lamp in front of the test tube […]

The open ocean, which covers 65% of Earth’s surface area and has low production, contributes the most to Earth’s overall net primary production. Energy flow declines gradually in an ecosystem’s food chain due to loss at each link. Producers rely on plant or our food for survival, leading some individuals to become vegetarians due to […]

During the experiment there were some mistakes in the data cause of human error. Scientists accidentally spilled the hydrated copper sulfate after the second measurement though It lost 0. 07 g when It was only supposed to As is explained in question two below, when not all of the water is driven off there is […]

Therefore, the amount of CO produced from a respiring seed can be an indicator of the amount of activity that is taking place in its cells. Germinating peas in particular undergo cellular respiration in their early stages of development, as they are often buried underground where there Is no light present for photosynthesis to take […]

This will include: the color of the medium immediately surrounding the colonies after addition of iodine on PDA plate, whether bubbles were observed or not in the atlas test, the color of the urea slant, the color of the citrate slant, and whether the rabbit plasma remained liquid or became solid due to clot formation, […]

Draw or paste the following data table in your journal. Chemical Indicator Macromolecule Initial Observation Observations for a Positive Test Berries Solution Benedicts solution Gogol’s Iodine Paper Bag 2. Visit each of the stations set up in the classroom. Follow all instructions carefully and make detailed observations in the data chart to assist you in […]

In addition to recrystallizing acetanilide, the experiment involved trying to recover the crystals with the least impurities. The major laboratory technique used in this lab was hot vacuum filtration, which involved pouring the heated test tube of acetanilide and water through a Buchner funnel that’s on top of an Erlenmeyer flask.Following the recrystallization, the recovery […]

Topic: The use of biogas as a fuel source on the farm Biogas is widely used on farms as an affordable and reliable power source. It can be easily obtained from readily available raw materials, especially animal waste. This makes it highly recommended for farm use because it not only converts animal waste into biogas […]

Abstract Through experimentation looking at freezing point depression and heat of dissolution, potassium chloride’s effect as a deicer was measured. In solutions, KCl lowered the freezing point of water below zero degrees Celsius, and was seen to increase in magnitude as the concentration increased. The enthalpy of the dissolution was found to be endothermic, meaning […]