... directly without pumps or fans. Houses with passive solar heating have energy-efficient windows that face south so that the house absorbs as much heat as possible from the sun. They are also built with large amounts of stone, adobe, or ...

... of marine plants and animals under pressure over millions of years? _petroleum_ 4. Which is found as a result of the decomposition of the other two and usually found in the same deposits? __methane__ 5. The heats of combustion for three fossil ...

... It is very rarely ploughed in as it takes along time to biodegrade and as it does so it creates anaerobic pockets in the soil. Wood can be exploited as a renewable resource if fast growing species are used. In the ...

... material, which generate electricity when illuminated by sunlight. Although it is difficult to generate a high output from solar energy compared to sources such as nuclear or fossil fuels, it is a major non-polluting and renewable energy source. Solar furnaces ...

... Trees die and fish socks in lakes decrease significantly due to the high acidity of the water. Soils loose their fertility due to the fact that previously un-dissolvable minerals such as iron are washed away by the acidic water. Coniferous ...

... foreign energy. Security is the main concern, and energy buyers and suppliers are mostly concerned with this view of energy. Nuclear energy is a form of energy that is created through the reaction and exchange of electrons. It is stored ...

... organism cooperates to create a delicate, but rich balance of power. I like to compare this delicate balance to a house made from a deck of cards. If just one card falls, the entire structure crumbles. Waldo Emerson once said ...

... or less effective, each enzymes does it's job just as quickly, there are just more enzymes to go around. If there was minimal enzyme concentration, eventually the reaction would be completed, due to the fact that and enzymes doesn't get ...

... occur, the energy needed for the chemical to occur is also known as the activation energy. Without the enzyme, the activation energy needed for the reaction to proceed is high and vice versa. Enzymes are made up of proteins where ...

... responsibility to ourselves, our children and the environment. In the 21st century we have started to understand that we have used over 50% in the last 100 years of the earths natural energy and need to find a renewable energy source. ...

... happens. For single celled/unicellular organisms the surface area to volume ratio is large, however, for larger organisms the surface area to volume ratio decreases. The larger the object gets the more complicated it gets. 1cm 1cm 2cm 1cm 3cm 2cm 2cm 3cm ...

... this, they need to obtain the raw materials from their environment. * Green plants are photoautotrophs, which mean they use light energy in the process of photosynthesis. Carbon dioxide from the atmosphere, together with water and mineral ions from the ...

... of ATP in energy exchanges in biological systems. The molecule itself is a nucleotide consisting of an adenine, a ribose and a triphosphate unit. The latter is the key feature in its role as an energy carrier. The two phosphoanhydride ...

... as anaerobic respiration. When yeast respires anaerobically it produces alcohol. The reaction has the following equation: - Glucose => energy + alcohol + carbon-dioxide Cells, such as yeast are often used in industrial processes. At the end of the process the yeast ...

... their equipment. Organisations such as supermarkets benefit by having fewer farms to negotiate purchases with. These points mean that intensive farms are on the whole economical and resourceful. In monoculture areas, most hedges, walls and fences are removed which profits farms by; Creating more ...

... To ensure a fair test, I must keep the controlled variables for every test I do. The apparatus must all be kept the same because there may be some minor differences in insulation properties, or measure of accuracy between them. If ...

... will have a significant effect on the distribution of the flat periwinkle. The flat periwinkles interactions with the abiotic environment could change as a result of shell colour. As different colours absorb heat at different rates, with darker colours absorbing ...

... molecules will travel straight through the cell membrane, these molecules include O, Co , N, steroids, fatty acids, vitamins A, E, D and K, alcohol and ammonia. For this to happen the concentration must be different; this is known as concentration ...

... is converted to pyruvate, via a series of steps. Two of these steps are directly linked to the formation of ATP. In both cases, the substrate is at a much higher energy level than pyruvate, and sufficient energy is transferred ...

... expensive business to find oil and we also have to do it with science so that we can find oil. The rocks contain oil and gas which are hidden from the view by sea or other rock layers the other thin ...

... uses the energy stored in ATP. A coenzyme breaks off a phosphate unit and releases energy to move the bird's muscles. The reaction is exergonic, releasing about ten calories of energy. If all the energy is not used in muscle ...

... fourfold between 1950 and 1990. last year 25 million tonnes oil equivalent of energy were consumed. 20 million of this was fossil fuels. 99.1% of energy consumed in the UK in 1997 came from non-renewable resources, 87.8% of which were ...

... modern world it is becoming increasingly important that we find a practical and sustainable new form of energy and soon. One possibility is that we harness the source of energy that has been powering the stars over the aeons, the ...

... of oxygen. Therefore there is a greater rate of diffusion into the organism, along a concentration gradient and combined with a moist surface, it will be a very high rate. The opposite is found for Carbon Dioxide where ...

... hence, the emphasis on oxygen in aerobic respiration. The initial stage of cell respiration, is a process called glycolysis, which splits a glucose molecule into two molecules of pyruvate, a 3-carbon compound. Glycolysis occurs in the cytoplasm of the cell. What ...