Scientific Experiment Essay Sample
Abstraction: We conducted several experiments utilizing the Scientific Method. We made observations. recorded them and used our observations to suggest a hypothesis. The experiments included chemical and physical reactions covering with lacerate intelligence paper. visual aspect of stone salt crystals. the visual aspect of sand. oil and H2O on plastic. and doing I in H2O and mineral oil. We found that all these included four physical alterations and two chemical alterations. This was of import in finding the substance or mixture that dealt with physical and chemical belongingss every bit good as homogenous and heterogenous mixtures. Purpose/Hypothesis: The intent of this experiment was to enter observations refering chemical and physical alterations utilizing common family stuffs. We besides practiced utilizing the scientific method. which including doing observations. hypotheses. and decisions based on informations. Procedures: We experimented with: newspaper. stone salt. sand. oil. H2O. and several chemicals. We did the followers: * Newspaper- We tore the paper vertically and so horizontally and observed the borders with a manus lens to find if there was a difference in the type of tear.
* Rock salt-We examined the salt before and after oppressing it with a blunt object. so what the sherds looked like in H2O. * Sand-We observed the sand with a little manus lens while it was dry so while it was wet adding several beads of H2O. * Oil and Water-We studied the difference between mineral oil and H2O utilizing a manus lens. * Making iodine in water- We added one bead of K iodide and Na hypochlorite ( bleach ) so mixed the two together bring forthing I. * Making iodine in oil-We added two beads of mineral oil. one bead of H2O on the mineral oil. so added one bead of K iodide and Na hypochlorite. Producing Iodine. Consequences: In category we conducted four experiments on the physical alteration and two experiments on the chemical alterations. We used both heterogenous and homogenous stuffs. The consequences of our experiments appear in Table 1. Discussion:
* When we tear the newspaper horizontally. we observed more fibres ; this indicated to us that more fibres had been laid down vertically when the paper was made ( Table 1 ) . * When we crushed the stone salt crystals. we observed more bantam sherds of stone salt instead than bigger pieces. We so noticed how they became more defined in H2O before fade outing into a clear mixture. * We observed the visual aspect of different pieces of sand grains and so analyzed the consequences while we put the sand in H2O. This showed the sand grains more clearly and more defined. as in their forms and sizes. * When we added a bead of oil on the reaction surface. we observed defined smooth borders. When the bead of H2O was on the reaction surface. we observed more unsmooth borders. * When we dropped the K iodide and the Na hypochlorite they were both clear before blending. We observed the chemicals after blending and it turned to a xanthous colour with little ruddy points. This indicated that there was a chemical reaction after blending the two chemicals.
* When we added H2O to the oil so we added K iodide and Na hypochlorite. the consequence was a gilded centre of I. This indicated that there was a chemical reaction but the oil had an consequence on the I that was made. Decisions: With this experiment there were several different thoughts brought approximately. We learned the differences of physical and chemical alterations and features. We besides learned how to detect if a chemical reaction occurred by colour alteration. formation of a solid. and formation of a gas. With the fillip inquiries. we learned the newspaper. stone salt. sand and the oil and H2O on plastic was an illustration of physical alteration. The I in H2O and oil was an exampleof chemical alteration.
Table 1. Consequences of Scientific Method Experiment. Environmental Science category. Thomas University. 8 October 2012. | Procedure| Observation|
a ) Torn paper | Vertical tear: Few fibres. rigid. non smoothHorizontal Tear: More fibres. all waies. rigid. non smooth| B ) Appearance of stone salt crystals | Before suppression: Solid. some parts clear. unsmooth unnatural shapeAfter suppression: smaller. still unsmooth stiff pieces. Sharper glistening sherds. Moisture: Dull looking sherds of crystal. Floating so dissolving| degree Celsius ) Appearance of sand | Dry: Tan. orange. brown. bantam. solid. All different forms and sizes. Moisture: Shows grains more clearly and separately. Floating| vitamin D ) Oil and H2O on plastic | Oil: More clear. defined smooth edgesWater: rougher borders. surface tension| vitamin E ) Making I in H2O: K iodide ( KI ) . and sodium hypochlorite ( bleach. NaClO ) . | Both chemicals were clear before blending. After blending turned to a xanthous colour. Small ruddy points in the center and stained the plastic. Smooth. unit of ammunition mixture. | degree Fahrenheit ) Making I in oil: mineral oil. H2O. K iodide. and sodium hypochlorite. ( I ) | Initially: Gold Center of iodineAfter 5 min. : the I separated into two halves. with a clear centre. |
Pulling of what you see for measure 7:
The bead to the right and the left are the colourss of the K iodide and Na hypochlorite. They were both clear. After blending them together they turned a xanthous colour stand foring the bead in the center. Not as bright. more of a pale yellow.
The bead to the right and the left are the colourss of the K iodide and Na hypochlorite. They were both clear. After blending them together they turned a xanthous colour stand foring the bead in the center. Not as bright. more of a pale yellow.
