for purifying solvents and liquid reaction products. To understand distillation‚ first consider what happens upon heating a liquid. At any temperature‚ some molecules of a liquid possess enough kinetic energy to escape into the vapor phase (evaporation) and some of the molecules in the vapor phase return to the liquid (condensation). An equilibrium is set up‚ with molecules going back and forth between liquid and vapor. At higher temperatures‚ more molecules possess enough kinetic energy to
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Transpiration Lab Write-up. Introduction Transpiration is the evaporation of water from plants. It’s not simply a hazard of plant life but it’s the engine that pulls water from the roots to cool the leaf and supply photosynthesis. The concentration of water vapor in the atmosphere is lower than that in the leaf. Because of this difference‚ water vapor diffuses from the spaces of the leaf‚ through the stomata in the epidermis. Stomata are in the lower epidermis; the lower surface receives less
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Detailed Lesson Plan in Science IV (Soil Erosion) I. Learning Objectives a. Identify the agents of soil erosion. b. Explain how each agents cause erosion. c. Perform related activities enhancing knowledge about soil erosion. d. Enumerate ways and means on how to help prevent soil erosion. II. Subject Matter a. Topic: Soil Erosion b. References: c. Concepts: Soil Erosion and its Effects d. Sciences Processes: Observation‚ Experimenting‚ Analysing e. Materials: 2 large
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atmospheric pressure‚ precipitation and evaporation rates were tested in each place‚ all with three trials then its average. A laboratory thermometer‚ slingshot psychrometer‚ barometer‚ graduated container cups and aluminium pan/containers were used respectively. Two containers were placed considering the physical conditions (if in direct sunlight or shade and indoors or outdoors). The experiment showed that the classroom environment has the least evaporation rate‚ most humid or the three locations
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sweating is primarily a means of thermoregulation which is achieved by the water-rich secretion of the eccrine glands. Maximum sweat rates of an adult can be up to 2-4 liters per hour or 10-14 liters per day‚ but is less in children prior to puberty. Evaporation of sweat from the skin surface has a cooling effect due to evaporative cooling. Hence‚ in hot weather‚ or when the individual’s muscles heat up due to exertion‚ more sweat is produced. Animals with few sweat glands‚ such as dogs‚ accomplish similar
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which liquid evaporates faster. II. Science Concept Evaporation is the process whereby atoms or molecules in a liquid state gain sufficient energy to enter the gaseous state. The rate of evaporation is dependent upon temperature‚ humidity‚ and wind speed. The higher the temperature is the quicker the rate of evaporation. In areas of low humidity‚ evaporation occurs at a more rapid pace. Finally‚ the higher the speed of wind the quick the evaporation process will be. The scientific method is
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taken in is too drastic. The cells may lose their turgidity and may even submit to plasmolysis‚ which will result in the plant wilting and eventually dying. Water loss via transpiration (loss of water vapour from the aerial parts of a plant due to evaporation) is fundamentally inevitable due to the fact that plants exchange gases with the atmosphere‚ via their stomata-the pores in a leafs epidermis . The bad aspect of this is the fact that the plants must photosynthesise in order to acquire the energy
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he put out a series of papers about steam economy and steam engine work‚ a prelude to his invention involving steam. In fact‚ it was during the time that he was writing these papers‚ most likely‚ that he created his theory about multiple effect evaporation. Between 1884 and 1854‚ he created the Rillieux apparatus‚ a revolutionary invention. In 1864‚ he patented his first model‚ and advanced the system for eight more years‚ and received more patents. It took him ten years to create the final model
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will then be separated through the means of filtration. Then the salt will be separated from the water through evaporation. Theory: If the heterogeneous mixture is separated through filtration then the salt water and sand should be separated completely.A heterogeneous mixture is a mixture that is not evenly distributed throughout. If the homogenous mixture is separated through evaporation‚ then their should just be salt left over. A homogeneous mixture is mixture that is thoroughly distributed evenly
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having five replicates for each combination of factors. The experimental data showed a significant difference among the results. Upon further examination‚ it was found out that the difference occurred due to the type of liquid used. The rate of evaporation and the densities of the liquids have contributed largely on the rejection of the null hypothesis. Thus‚ the two cotton brands have no significant difference in their absorbency capacity. Analysis and implications of the results were discussed and
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