Biology lab: measuring the effect of light intensity on plant growth Aim: Investigate the effect of light intensity on plant growth Hypothesis: Light intensity will have an effect on plant growth. With an increase in light intensity there will be plant growth at a faster rate in comparison to when the light intensity is low where plant growth is limited and will take place slowly. When there’s too much light intensity‚ the light intensity will no longer become a limiting factor. A limiting
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fourteen jointed limbs. Woodlice form the suborderOniscidea within the order Isopoda‚ with over 3‚000 known species. The woodlouse has a shell-like exoskeleton‚ which it must progressively shed as it grows. The moult takes place in two stages; the back half is lost first‚ followed two or three days later by the front. This method of moulting is different from that of most arthropods‚ which shed their cuticle in a single process. Metabolic rate is temperature-dependent in woodlice. In contrast to mammals
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Light Intensity Characteristics of Photocells The photoelectric effect is defined as the emission of electrons from a material by visible light. The cadmium sulfide photocell is used to act as a conductor once exposed to light‚ allowing light to travel through. However it also acts as an electric resister (an opposition to a current flowing in a circuit) once not exposed to light. The photocell serves today ’s cause in a sufficient manner. It is used for a variety of reasons but it is mainly
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out how light intensity can affect the rate of photosynthesis. Hypothesis I think that the further away the light source is the smaller the rate of photosynthesis is. This is because there is a further distance for the light to each the plant in order for it to photosynthesise. Although the closer the light source is‚ the more photosynthesis‚ the light source could also kill or damage the Elodea (type of pondweed) because it could become too hot and denature its cells. But because light intensity
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nvestigation into the Factor of Light and Dark Affecting Woodlice Predictions It was expected that a woodlice would prefer a damp‚ dark‚ but moderately warm surrounding. Normally one would expect to find slaters under logs or concrete slabs in one’s garden. Under these large objects‚ the sun cannot reach directly; therefore it is darker‚ damper and colder than the surroundings. Nevertheless‚ in winter we do not see woodlice crawling around very often‚ and‚ also at night‚ it may
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investigate how light intensity affects the rate of photosynthesis in pondweed. The rate of photosynthesis will be measured by the number of bubbles given off (considering that oxygen is produced as a waste gas during photosynthesis). The light intensity is measured by the distance between the lamp and pondweed. Fair test: Fix: the amount of pondweed‚ the amount of water and sodium hydrogen carbonate solution in the test tube‚ the time allowed for each experiment Change: the distance from the lamp
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How light intensity effects the Rate of photo synthesis. Aim The aim of my experiment is to find out how light intensity affects the rate of photosynthesis. Prediction I predict that as the light intensity increases that the rate of photosynthesis will increase in proportion‚ so for example if you increase the light intensity from 10cm away to 20 cm away form a stationary plant. There for the rate of photosynthesis will decrease proportionally with the distance of the light from the plant (in
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Woodlice - Porcellio Scaber Research: Introduction: [The following is summarised from: http://soilbugs.massey.ac.nz/isopoda.php] Common Names: Slaters‚ pill bugs‚ sow bugs‚ woodlice‚ Maori papapa Scientific Name: Arthropoda (Phylum) Crustacea (Class) Isopoda (Order) Oniscoidea (Suborder). Description: Slaters are apart of the Isopoda order‚ meaning they have an equal number of legs. They are also a crustacean‚ but unlike most crustaceans they are terrestrial opposed to marine dwellers
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Other responses shown include a positive thigmokinetic behavioural reaction. A woodlouse’s rate of movement will decrease in regards to how much of its body is in contact with another object. This results in a ‘clumping’ behaviour with groups of woodlice. They will group together in order to stave off both desiccation and risk of predation. As well as behavioural adaptations the woodlouse also has several physiological adaptations that increase its chances of survival and subsequently reproduction
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How does light intensity and carbon dioxide levels affect photosynthesis rate Phaladi Phaladi 201102379 Department Of Mathematics And Science Education University Of Botswana Plants‚ through the use of chlorophyll (green pigment in plants) that traps light can generate ‘food’ by combining carbon dioxide in the air and water. As with many chemical process energy is need to make and break molecules during the chemical process. The greater the light levels the more energy is available to carry
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