Will participants perform better in a low or high density room?
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Aim of the experiment was to see whether performance is affected by the density of a room and done in a laboratory experiment with repeated measures design; there were two conditions, high density room and low density room. Participants were 8 females aged 16 - 18 from Abbot Beyne 6th Form. Results showed that performance is affected by the density of the room, but opposite to what was predicted in the Experimental Hypothesis. (N=7, 1 tailed test, P=0.05, critical value…...
Stomatal Density
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Aim: To investigate the stomatal density of different leaves. Apparatus: * Light microscope * Distilled water * Water pipette * Microscope slide * Cover slip * Scalpel * Forceps * Colourless varnish * Ruler * 4 different types of leaves: 1. 2. 3. 4. Hypothesis: The stomatal density of plants is dependant on their habitat. The key factor which the stomatal density will depend upon will be the water supply and the extent to which the environmental factors of each…...
The stomatal density of a dicotyledonous plant growing in both Sunny and Shady conditions
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This project investigated the stomatal density of a dicotyledonous plant growing in both Sunny and Shady conditions. The stomatal density of a batch of leaves taken from the main branches of the plant was estimated using a light microscope and an eyepiece graticule. Transparent nail varnish was used to obtain replicas of the different adaxial (lower) leaf surfaces by carefully applying it to the same area of the different sample and carefully removing it with the aid of a pair…...
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Australia’s Population Distribution and Density
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The physical environment has determined to some extent, the distribution and density of Australia’s population. Discuss. People do not live evenly spread through the world. Australia is one of the counties that considered has a low population density. This is due to approximately 23 million population were distributed unevenly. Besides the physical environment, there are also a variety of other factors that have actually worked together to distribute in the Australia’s population that cannot be neglected. These included the economic…...
Egg Buoyancy and Density
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March 4, 2010 Egg Buoyancy and Density: Can you make an egg float by changing the density of water? If you put an egg in tap water, it will sink to the bottom. If you add enough salt, the egg will float to the surface. Density is the mass or volume of an object. It's easier to think of it as the thickness of the object. Buoyancy is the force that allows an object to float. I performed a fun…...
Chemistry thermo lab, Hess’s Law
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Introduction: In this lab, we will be determining the change in enthalpy for the combustion reaction of magnesium (Mg) using Hess’s law. Procedure: 1. React about 100 mL of 1.00 M hydrochloric acid with 0.80 g of MgO. Note the change in temperature and any qualitative data. 2. React about 100 mL of 1.00 M hydrochloric acid with 0.50 g of Mg. Note the change in temperature and any qualitative data. Raw Data: Quantitative: Reaction, trial Mass (± 0.01 g)…...
How does the viscousity
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Viscosity is a measure of a fluid's resistance to flow when acted upon by an external force such as a pressure differential or gravity. Viscosity is a general property of all fluids, which includes both liquids and gases. It describes the internal friction of a moving fluid. A fluid with large viscosity resists motion because its molecular makeup gives it a lot of internal friction. A fluid with low viscosity flows easily because its molecular makeup results in very little…...
Lab Report: Environmental Control of Sex Determination
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Introduction Ceratopteris richardii, known as a C-fern has a lifecycle referred to as alteration of generations, which consist of neither haploid nor diploid dominant. C-ferns are homospours plants which are important in that they can produce hermaphrioditic gametophytes in order to be able to self fertilize. However, some of the homospourous C-ferns only produce male gametophytes .The life cycle of Ceratopteris richardii starts as a diploid sporophyte which then, by meiosis, produces haploid spores. These spores then undergo mitosis to…...
Pre-Lab Report Density of Liquids and Solids
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Purpose of the experiment: The purpose of this lab is to help understand how to resolve the density of liquids and solids. Also, the lab is supposed to teach us how to record lab data and how to measure volume and mass the correct way. Lastly, it’s designed to help us understand significant values and its relationship to measurements and data recording. Lab Techniques: One technique that will be used during this lab is comparing the accuracy (absolute & percent…...
Density Lab Write Up
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Abstract The purpose of this experiment was to identify whether density is an extensive or intensive physical property. By using water displacement, the volumes of the paper clip samples were measured and the masses were obtained by using an electronic balance. Each mass and volume was unique to their sample so by using their values, density was used to identify substances in the lab. After conducting the experiment, the results showed that there was a positive slope between the different…...
Relative Density
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Abstract The experiment about relative density is composed of three different activities. The first activity is about the Displacement Method for alloy, the second activity is about getting the density of a bone and the third activity is about Regular versus Diet Soft Drinks. Introduction Relative density is the ratio of the density (mass per unit volume) of a substance to the density of a given reference material. The theory or the principle that we used for the experiment is…...
Science Behind the Galileo Thermometer
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The Galileo thermometer, used to measure temperature, is mainly used for home décor nowadays. The stylish thermometer used in people’s homes today is based off of a thermo scope Galileo invented in the early 1600’s. Although not exact, the Galileo thermometer is moderately accurate. The thermometer has several glass blown bubbles, with a colored liquid inside which is just for decoration. The bubbles have metal tags attached to the bottom of them with an engraved number on it, for example…...
Measurement of Length, Mass Volume and Density
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Introduction: All science is concerned with measurement. "MEASUREMENT" is the determination of the size or magnitude of something "Or" The comparison of unknown quantity with some standard quantity of the same rates is known as measurement. Due to this fact we have standards of measurement. Since the precision of all measuring instruments is limited, the number of digits that can be assumed as known for any measurement is also limited. When making a measurement, read the instrument to its smallest…...
Determination of the identity of an unknown liquid
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Purpose The purpose of this lab is to determine the identity of an unknown liquid by measuring its density and its boiling point and try to match it with those solutions given in Table 2 of experiment 2. Procedure In Part A, The main purpose was to find the determination of the density of the unknown (j41) and by doing that we had to determine volumes of the unknown liquid (j41) using three different volumetric devices which are graduated cylinder,…...
Moment of Inertia
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Abstract The moment of inertia, or also known as the rotational inertia, is the rotational analog of a rigid body to a linear or an angular motion. It is one of the fundamentals of the dynamics of rotational motion. The moment of inertia must always be in a specified chosen axis of rotation. The point of motion is basically defined as the relationship between mass and the perpendicular distance to the rotational axis. KEYWORDS: Moment of Inertia, Rigid body, Angular…...
Basic Laboratory Techniques
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Objectives To use common laboratory apparatus in measuring mass, length, volume, temperature, and density To compute the accuracy and the precision of a set of scientific measurements To apply the concept of significant figures in reporting correctly scientific measurements Materials and Equipment Ruler, meter stick, 10 mL graduated cylinder, 50 mL graduated cylinder, small and large test tube, 50 mL and 150 mL beakers, 50 mL Erlenmeyer flask, digital top-loading balance, unknown liquids for density determination, irregular solids for density…...
Brassica rapa plants
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Abstract In this experiment, intraspecific competition was tested which is when members of the same species compete for a same resource. The experiment tested was to see if intraspecific competition using differing densities affected the growth rate of Brassica rapa plants. Brassica rapa are a type of mustard plant also considered the “fast plants” because they grow within a 6-12 week period. They were used for this experiment due to their fast and easy growing process. Past experiments were observed…...
Laboratory Techniques & Measurements
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Laboratory Techniques & Measurements Objectives: Become familiar with several important laboratory techniques. Gain proficiency with some of the common measuring devices used in a chemistry laboratory. Determine the volume, mass, length, temperature, and density of objects and liquids Length Measurements: Object Length (cm) Length (mm) Pop Can 12.0 120.0 iPhone 11.7 117.0 TV Remote 16.3 163.0 Temperature Measurements: Hot water from tap (⁰C) - 47 Boiling Water (⁰C) - 61 Boiling Water after 5 mins.(⁰C) - 73Cold water from tap (⁰C) - 15 Ice…...
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FAQ about Density

How does the viscousity

...Another source of error is the acceleration that occurs between the ball being dropped and it hitting the liquid. If the experiment was to be extended, the size of the ball bearing could be varied and the temperature kept constant, this could elimina...