Biology Coursework Practical – Heat Loss The aim of this practical is to find to what extent does the surface area to volume ratio of an object affect the rate of heat loss from the object Hypothesis: As the ratio of surface area to volume of an object decreases the rate of heat loss from the object will also decrease. Objects with the same surface area to volume ratios loose heat at the same rate so long as there are not other variables involved. Background Knowledge: The surface area to volume
Investigating Heat Loss From a Container Planning We are investigating heat loss from a container and how it is affected. We could change: Room temperature Surface area Amount of water Use a lid Insulate around it Colour of tin We could measure / observe: Amount of time Temperature We will change: Surface area We will measure / observe: Temperature (every minute for 5 minutes) Our question is: Does surface area effect the rate of heat loss? We will
Heat Loss Investigation Aim To investigate how variations in surface area and volume ratios in organisms lead to variations in heat loss and retention. Introduction Large animals have the ability to retain heat more easily than smaller animals because they have a larger surface area to volume ratio. This is the what I am trying to prove in the experiment. There are examples of this in nature. In winter the robin fluffs its wings up in order to retain more heat. When it does this
Heat Loss Investigation Introduction My investigation is to find out the rate of which heat is lost or transferred. Heat loss happens when heat energy is exchanged between materials that are both at a two different temperature. There are different ways in which heat is lost they are: - conduction, convection, radiation and evaporation. All these processes can happen to heat. How am I going to carry out the investigation? I will be investigating the heat loss in animals and will be
Sweating and Heat Loss Investigation Aim To find out whether heat is lost faster over a sweaty body compared to a dry body. Apparatus 2 Boiling tubes 47ml max 2 Measuring jug 50ml max A Beaker 250ml max 2 thermometers Paper towels A kettle to boil water A stopwatch 2 magnifying glasses (8x) 2 corks with a small hole through the centre A test tube rack Preliminary work In my preliminary work, I need to find out how much water to use, whether the tissue
Insulation Can Affect Heat Loss 1/ Huddling 2/ Insulation We will investigate Insulation 3/ Surface Area/Volume Things that could effect heat loss include: Conduction Convection What are they? Radiation We are going to do the following lessons in this order: * Planning * Planning and Trial * Observation * Observation * Analysis * Evaluation Planning In this investigation, we are going to investigate how insulation can affect heat loss. We will do this by
Investigating Factors that Affect Heat Loss PROBLEM ======= I have been asked to investigate the link between colour and heat loss. Does the silver or the black cup lose its heat faster? HYPOTHESIS ========== I think that the black cup will lose heat faster than the silver cup because black absorbs heat, then releasing it out of the cup into the surrounding air and surface, where as the silver cup will reflect the heat back into the cup therefore keeping the water hotter for
Heat Loss Through Convection and Evaporation Aim Investigate if heat is lost through convection quicker then evaporation. Apparatus: Beakers, water (150ml), Thermometer, stand and clamp, red material, scissors and timer. Key factors =========== I need to keep the size of the beaker, water (150ml), temperature and insulating material. I need to Change where I put the insulating material on the beaker. I need to measure the water (150ml). To make this experiment a
Demonstrating How Surface Area and Volume Affect Heat Loss in Animals Planning ======== Aim: To investigate how surface area and volume of an animal affects the amount of heat lost. Planning a simple procedure =========================== One standard test tube, one boiling test tube, and one centrifuge test tube will be filled with water at 40°C. A thermometer will be placed in each tube to measure the decrease in temperature of the water. This will be timed for 300 seconds
Investigation of how Changing the Volume of Water in a Container Affects Its Rate of Heat Loss Aim : To investigate how changing the volume of water in a container affects its rate of its heat loss. The variable of this investigation is the volume of water which is put in the container. What I already know: I already know that the larger the volume of water there is the less heat loss occurs. I can tell this from my previous pilot experiment where I investigated, if the volume of
When cellular respiration occurs in the body, heat is produced and given off into the environment by the release of potential energy contained in the chemical bonds of macronutrients. The amount of heat released into the environment and the rate at which chemical reactions occur in the cells are directly related. Two different relationships exist, one that describes the endothermic animal and one that describes the endothermic animal. The rate of heat produced by the endothermic animal while at
patients are clinically hypothermic. Hypothermia is caused by a patient’s exposure to cold operating room temperatures that are required by surgeons to control infection, and for the personal comfort of the surgeon. Hypothermia can also be a result of heat loss due to evaporation of the fluids used to scrub patients, evaporation from exposed bowel, and breathing of dry anesthetic gases. Dr. Augustine’s personal experience in the operating room convinced him that there was a need for a new system to warming
Investigation of the Cooling of a Liquid in Cups with Different Materials Aim: To investigate how a liquid cools down in cups with different materials. Prediction: The factors which will affect the amount of heat loss are: § Material of the cup – Conduction § Colour – Radiation § Surface area of cup § Amount of water (surface area:volume ratio) § If the cup has a lid or not – Convection and Evaporation § Room temperature § Thickness of the cup § Temperature of the liquid
in excellent heat conservation. Many penguins, in addition have a think insulating layer of fat under the skin. Their closely aligned veinlarteries enable them to recycle their own body temperature. The emperor penguins, weight about 27-32 kg are the best equipped of all. They have nasal chambers which recover heat loss through breathing. On very cold days, as many as 10 penguins pack into every square metre of a huddle. This helps warm the penguins because they transfer heat between individuals
materials are best at keeping water in a copper beaker warm. A material that prevents this heat loss is called an insulator. Insulators have to prevent three types of heat loss: · Conduction · Convection · Radiation Conduction - This is where heat energy passes through the walls of the copper beaker by making the particles of the beaker vibrate which makes the particles next to them vibrate causing the heat to pass through the walls of the beaker to the surroundings. Materials that are good
particles. I will also put them in the same room together so the room temperature will be the same. The cans are made of the same material (aluminium) because I am testing surface area rather than different materials. I will use a water bath to heat the water so both cans will get the same temperature of water. This is how I will make it a fair test. Method The method I will be using is; I will boil 140ml of water for each can in a water bath at 80oC. Then put the 140 ml in each of the
shield to reduce heat loss. I will set up my apparatus as shown below. To ensure my experiment is safe, I will sport goggles and comply with all of the normal laboratory requirements, such as not sitting on benches. To further my acknowledgement of safety, I will have to take care as one of the alcohols burns with a clear flame. [IMAGE] I predict that, from observing my bond energy calculations (sheet 1a), the alcohol that will heat up the water in the least weight loss will be Butanol
Prediction I predict that cotton wool will be a good insulator because it will be very good at reducing the heat loss. This is because inside cotton wool there are many small pockets of trapped air, and air is a very good insulator in small pockets. However I believe that fibre glass is also a good conductor because this material also traps air, thus preventing loss of heat due to convection currents. Air in its self will also be a good insulator, but as I am only using the polystyrene
Introduction: The Stirling engine has huge potential to be applied for converting heat into the mechanical work among a high thermal efficiency. Its thermal efficiency might be as high as the Carnot efficiency. The Stirling engine is an external combustion engine and it can be powered by various heat sources and waste heat. It is a simple type of external-combustion engine so it can be uses a compressible fluid as a working fluid. The thermal limit for the operation of a Stirling engine depends on
Reactions The problem: The problem that I will investigate is how to use enthalpy changes of metal reactions to experimentally test the reactivity series of common metals. Therefore the area that I am looking at is reactions involving metals and the heat energy that is evolved when these take place. In brief the reactivity series of metals is a list in which metals are ranked according to their reactivity, from the most reactive metals (such as Pottassium) at the top to Gold the least reactive