Science Fair Packet Name_______________________________ Date ________________________Per_____ DULUTH HIGH SCHOOL SCIENCE FAIR I. Science Fair Rationale: Science Fair allows the science student a chance to do “real science”. Coursework provides science facts and formulas‚ but conducting a scientific investigation gives a student the practice in time management and the use of variables‚ research‚ observation and analytical skills that a student needs if interested in a career
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Polarity of a Battery Powered Motor Problem: Will changing the polarity of a battery powered motor change the direction the motor spins? Hypothesis: If the polarity is changed on a battery motor‚ I think it will change the direction the motor spins. I think it will act like reverse button. Methods: I. Connect a battery powered motor to a battery using a simple circuit a. Check that the negative of the battery is connected to the negative of the motor
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use lithium batteries in its flashes‚ but Yongnuo introduced a flash‚ Canon compatible‚ that uses a lithium-ion battery. The Yongnuo Speedlite YN686EX-RT is compatible with Canon’s RT- series of flashes‚ but contrary to Canon’s units uses a lithium-ion battery said to be faster and offer 750 full-power flashes from a single charge. When lithium batteries became a common thing in the market‚ some photographers managed to fry their flashes‚ because they picked a set of AA lithium batteries and used them
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I. The Irish Potato Famine was a catastrophic event in Irelands history. Almost a million people died during this harsh time. They had lost their main food source and barely had food for one person let alone their families witch consisted of 5-7 people on average. At the time they were considered a part of Britain but Britain did not help much during their crisis. The Irish Potato Famine of Ireland in 1845 resulted in a great population loss‚ a changed economy‚ and a substantial emigration of citizens
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George Garton will likely be liable for battery because he intentionally blew smoke in Martin Trout’s face. In general‚ battery is defined as touching with the intent to harmfully or offensively contact another person. In this case‚ Mr. Garton’s actions were purposeful and showed intent. Also‚ Mr. Garton’s actions were offensive because smoke is an unpleasant substance. Therefore‚ the issue here is whether blowing smoke in Mr. Trout’s face is considered touching. Mr. Garton’s actions will likely
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Introduction In this experiment I am going to investigate the effect of varying concentration of a differing glucose solution on the amount of osmotic activity‚ between the solution and a potato tuber of a given size. The purpose of this experiment is to demonstrate how living cells rely on osmosis‚ the diffusion of water. Osmosis is the movement of water molecules (H20) from a region in which they are highly concentrated to a region
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concentration. Hypotonic solution is the solution with the lower salt concentration. My hypothesis is that the potato core will increase in size. When the solution is hypertonic‚ the potato will decrease in size making the potato hypotonic. Osmosis is really interesting‚ that is why I chose to write this report about it. Materials and Methods We first cut out six cores out of a potato. We trimmed them all to the same length using a razor. After we had cut them to the same size we weighed them using
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Title: Potato Osmosis Abstract: In this experiment was designed to study the effect of a concentrated solution applied to white and sweet potatoes. The solution’s impact among the potatoes were to be either hypertonic‚ hypotonic‚ or isotonic. The potatoes were first cut into fries with a fry cutter‚ and then weighed after being cut. The white and sweet potatoes’ weights ranged from .005-.015 grams. A total of 18 sugar solutions are to be made over the course of 3 trials. In each trial‚ 6 different
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distilled water‚ 0.4% NaCl‚ and 0.9% NaCl would all appear to be inflated and could burst. This is due to the fact that the solution is hypotonic to the potato‚ thus water is entering the cell. Meanwhile‚ the cells in the solutions 5% NaCl and 10% NaCl would have shriveled cells. This is because the solution is hypertonic and water is leaving the potato out into the solution. Record the Lysis Time: Solution Lysis Time (min) DI 1:36 Soapy Water 0:48 0.2% NaCl 4:30 0.4% NaCl NL 0.6% NaCl NL 0.9% NaCl
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Observing Osmosis in Potato Cells Planning Purpose: To observe the effect of osmosis on plant cells. Hypothesis: The higher the salt content of the water‚ the lower the mass of the potato. Variables: Independent: the salt percentage of the solution Dependent: the weight of the potato in grams Controlled: the amount of water the length of time between measurements the method of measuring the type of plant cells tested Equipment: (as seen on 2A Human Biology task sheet)
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