Investigation To Find The Effect Of Temperature On The Rate Of Photosynthesis Of Elodea.
Investigation To Find The Effect Of Temperature On The Rate Of Photosynthesis Of Elodea Hypothesis I believe that as the temperature rises, the rate of photosynthesis will also increase. That is until the plant reaches its optimum temperature and then the rate of photosynthesis will decrease. Photosynthesis is the process necessary for plants as this is how they obtain their food. The formula for this process is- 6CO2 + 6H2O ?6H1206 + 602. The rate of photosynthesis are affected by these factors: concentration of carbon dioxide, light intensity and temperature.If one of these factors increase, the rate of photosynthesis will increase but only to a certain point. The rate of photosynthesis could still increase but not because of an increase in that same factor. Another factor has to increase for the rate to increase. The factor that restricts the other two factors from increasing the rate of photosynthesis is called the limiting factor. For glucose to be made in photosynthesis, water is split into hydrogen and oxygen molecules by the energy absorbed from the sun. The hydrogen then has to combine with the carbon dioxide to produce glucose. If this was left on its own, the hydrogen would eventually combine with the carbon dioxide but it would take a long time. That is why a catalyst is needed to quicken the process. Enzymes are the catalyst used for the anabolic reaction.
This investigation is about what factors affect the speed of boiling water-cooling to room temperature.
This investigation is about what factors affect the speed of boiling water-cooling to room temperature. Factors which may affect how quickly hot water cools down are- * Material container is made from * The volume of hot water * Using a lid * Starting temperature of water. Aim of investigation The aim of this investigation is to find out how the type of container affects the way hot water cools down to room temperature. I am going to be using 4 types of container- copper, plastic, glass, and polystyrene. Prediction and Scientific Theory I predict that the polystyrene cup will keep the most heat because it is the best insulator. Polystyrene is a good insulator because it contains particles of air making it a bad conductor of heat. I predict that the copper cup will keep the least heat because it is a good conductor of heat. Fair Test To make the experiment a fair test I will- * Use the same amount of water. * Make sure the starting temperature is the same. * If one is stirred they all have to be stirred. * If one is blowed they all have to be blowed. * If one has a lid they all have to have a lid. Step-by-Step Step one-boil water Step two-Pour 50ml (accurately measured) into each container. Take the temperature of the water in each container make sure all temperatures are the same. Place lid on each container. Step three- Take the temperature of
The aim of the investigation is to see if giving a coffee cup insulation affects how much heat is lost
Coursework Aim: The aim of the investigation is to see if giving a coffee cup insulation affects how much heat is lost Prediction My investigation is to see which will lost the most heat a coffee cup with cotton wool insulation or without any insulation. Heat transfer is a process in which energy in the form of heat energy is exchanged between things at different temperatures. Heat is generally transferred in three ways conduction, convection, and Radiation. This experiment involves heat escaping by all three methods here is a description of each Conduction This is where heat energy passes through the sides of the cup by making the particles vibrate and will pass on the vibrations to the next particles causing heat to pass through the sides of the cup and out into the air Convection This is where the cooler water particles sink to the bottom and the hotter particles move to the top. Convection will only affect my experiment if a lid wasn't on. This is because the warm water will float up to the top and heat will escape. If you were heating a pan from below then it will become warm and less dense and they will rise to the top of the pan, as we know that hot air rises. Radiation This is infra red rays vibrating the particles next to them giving them more energy and therefore making the water warmer. The water particles at the top of the pan will radiate the heat into
Photosynthesis is a chemical reaction used by photosynthetic plants in order to make glucose. Displayed below, are the word and balanced symbol equations for the photosynthesis reaction.
Background Knowledge Photosynthesis is a chemical reaction used by photosynthetic plants in order to make glucose. Displayed below, are the word and balanced symbol equations for the photosynthesis reaction. catalysed by chlorophyll Carbon dioxide + Water --> Glucose + Oxygen 6CO2(g) + 6H2O(l) --> C6H12O6(aq) + 6O2 sunlight The photosynthesis reaction converts carbon dioxide and water into glucose and oxygen. The green pigment in the chloroplasts, called chlorophyll, acts as the catalyst in the photosynthesis reaction. It can be seen from the reactions, that the energy of the chemical bonds on the left-hand side of the equation is less than the energy of the chemical bonds on the right hand side; therefore the reactants must take in energy before the reaction can take place. This energy is provided by sunlight. The diagram below would correctly describe the photosynthesis reaction as plants take in the Sun's energy: As with all chemical reactions, the photosynthesis reaction has certain factors that affect the rate of the reaction. These factors can be adjusted to deliver conditions under which the reaction will take place most efficiently. These conditions are referred to as the optimum conditions. There are several factors that affect the rate of the photosynthesis
Investigate and compare, the biodiversity of freshwater invertebrates, of two water bodies, with high and low dissolved oxygen levels.
Investigate and compare, the biodiversity of freshwater invertebrates, of two water bodies, with high and low dissolved oxygen levels. Abstract The aim of the study was to compare the biodiversity of two water bodies dependent on the fixed variable of dissolved oxygen levels. The hypothesis was that there would be a greater biodiversity at the water body with a high dissolved oxygen level. The biodiversity was measured by 10 samplings of the water body with a net, and the organisms found were identified, counted and then returned. The samples were taken from River Stour a large lotic (flowing) river with high dissolved oxygen levels, and Dead River a lentic (still) water body with very low dissolved oxygen levels. The results showed there was a significantly greater biodiversity at River Stour with the high dissolved oxygen levels, this is because adequate dissolved oxygen is needed and necessary for good water quality. Oxygen is a necessary element to all forms of life. Adequate oxygen levels are necessary to provide for aerobic life forms which carry on natural stream purification processes. As dissolved oxygen levels in water drop below 5.0 mg/L, aquatic life is put under stress. The lower the concentration, the greater the stress. Hypothesis The biodiversity of freshwater invertebrates will be greater at the water body River Stour with a
Broad Bean Investigation.
Broad Bean Investigation Aim To investigate the ways in which temperature affects the period germination & growth of a broad bean over the duration of 21 days. I will keep 3 beakers in 3 different climates of temperatures and observe and note the alterations the bean will go through. These temperatures will be: * Room Temperature * In a chiller at a set temperature of 5°centigrade * And, in a water bath in the set temperature of 35° I will measure the shoots and roots of the beans and at the end of 3 weeks compare our results and see which temperature is ideal for a broad bean to grow in. Prediction I believe that in this investigation the beaker at room temperature will grow the best as I think this because the other two climates I believe are too extreme for the beans to grow in. The water bath I think may damage or kill the enzymes in the bean so there would be no growth. And I n the chiller the temperature would be too cold for any thing to grow in at all. I think that the cold would in fact slow down the growth of the broad bean So this is why I have come to the conclusion that it would be the best temperature at room temperature as you know in nature this is the temperature grows in. Variables Independent * The variable that will be changed throughout the investigation is the temperature. For beaker 1 I will have it at room temperature this I cannot
Effect of temperature on catalase
Aim and Hypothesis The investigation that we have chosen to do is how the effect of temperature affects the rate of reaction of hydrogen peroxide to water and oxygen using the enzyme catalase. I predict that the higher the temperature the faster the rate of reaction will be and the more oxygen there will be given off. I've based this prediction on kinetic theory (every 10 degree rise in temperature the rate of reaction doubles.) This is because the substrate will lock on twice as fast, as it is travelling twice as fast. To back up this prediction a pre experiment was carried out, one result was obtained, using this result here is a table of predicted values: Temp of 2H2O °C Amount of Oxygen produced CM3 7 3.5 7 7 27 4 37 28 47 56 57 12 67 0 - Denatured Red = initial experiment average. * Note: although most enzymes denature above the bodies natural temperature (35 - 37 degrees) catalase denatures at around 60 degrees. * When the enzyme is denatured the active site is destroyed so it cannot lock onto the substrate) Method: For the pre experiment, we measured the oxygen produced not water because it is a gas and therefore easier to collect. We decided on a time of 2 minutes 30 seconds, much longer than this would have taken up too much time. ASK MR LOVE ABOUT THIS BIT To work out the rate of reaction for the predicted results this formula was used: Rate
Importance of Water.
Importance of Water Our Earth seems to be unique among the other known celestial bodies. It has water, which covers three-fourths of its surface and constitutes 60-70 wt % of the living world. Water regenerates and is redistributed through evaporation, making it seem endlessly renewable. So why worry? Actually, only 1% of the world's water is usable to us. About 97% is salty sea water, and 2% is frozen in glaciers and polar ice caps. Thus that 1% of the world's water supply is a precious commodity necessary for our survival. Dehydration (lack of water) will kill us faster than starvation (lack of food). Since the plants and animals we eat also depend on water, lack of it could cause both dehydration and starvation. The scenario gets worse. Water that looks drinkable can contain harmful elements, which could cause illness and death if ingested. Good water is essential to body cleansing. It's obvious. It sounds like a truism. Your body goes down fast without water. Making up almost three-fourths of the body, every cell is regulated, monitored and dependent on an efficient flow of water. Not one of the processes in our bodies could take place without water. Water is something that we take for granted. But how many of us really understand how essential water is or what happens to our body if it doesn't receive pure water every day, free of chemicals and
Photosynthesis. In practice, TEMPERATURE, CARBONDIOXIDE, and LIGHT INTENSITY can interact to the limit of the rate of photosynthesis
Kieron Fenn Biology coursework Photosynthesis. Green plants don't absorb from the soil. They make their own food, using sunlight. This is called photosynthesis, which actually means 'making through light'. It occurs in the cells of green plants, which are exposed, to light. Carbon + Water LIGHT Glucose + Oxygen Dioxide CHLOROPHYLL 6Co2 + H2O C6H12O2 + 6O2 Some of the glucose produced in photosynthesis is used immediately by the plant to provide energy via respiration. However, much of the glucose is converted into insoluble starch for storage in the stem, leaves or roots. In practice, TEMPERATURE, CARBONDIOXIDE, and LIGHT INTENSITY can interact to the limit of the rate of photosynthesis. Anyone of them in particular at a particular time may be the limiting factor. With photosynthesis the more intense the light or the more amount of light the plants get, the more photosynthesising the plant will do. This means that I will be able to predict that my graphs up to a certain extent will be directly proportional. This also means that the light intensity will always limit the light of photosynthesis. There will be a point in the graph where the light will not effect the rate of photosynthesis. Therefore there must be some other limitation effecting the rate of photosynthesis which will either be the dark reaction,
To investigate the affect of light on the rate of photosynthesis.
SCIENCE 1 INVESTIGATION AIM: To investigate the affect of light on the rate of photosynthesis. BACKGROUND INFORMATION: Photosynthesis is essential for all life on Earth. Only green plants can convert sunlight into chemical energy and store it in their bodies. All animals are dependant on this energy, and they get it through the food chain, by eating plants or other animals that have already eaten plants. While chlorophyll, the green pigment in the leaves of plants, is present, photosynthesis makes water and glucose. The water gets to the leaves from the roots of the plant, while the carbon dioxide enters via the stomata on the underside of the leaves. Chlorophyll: Chlorophyll is the green pigment in plant cells that gives them their green colour. Most plants do not produce chlorophyll unless they are exposed to light. We know this because if a piece of paper were fixed to the edge of a leaf, after a few days a pale patch would appear. This is because light is unable to reach the cells that make chlorophyll. Chlorophyll is a molecule, which is made up mostly of carbon and hydrogen. It is mainly found in tiny chloroplasts in palisade cells, which are located in the leaves but could also occur in stems. Carbon dioxide: CO2 concentration can affect the rate of photosynthesis because the more CO2 there is in the air, the more of it can diffuse in the leaf. This can
