Before you can keep going with the experiment you have to take a 50ml plastic beaker and fill that one with 50ml distilled water‚ solve a pinch salt in the water and stir until you can’t see crystals anymore. Pour a little bit of that solution in a petri dish but make sure it will be below the horizontal line you draw on the filter paper. Set
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Inside each petri dish a paper towel was folded to the size of the dish and saturated with tap water. After saturation‚ two WFP seeds were added to each petri dish. The dishes were then labeled for their assigned light condition‚ which was either full fluorescent light exposure or darkness. Plants were left under their assigned light condition
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water in the basin. Materials: 250ml graduated cylinder Funnel Petri Dish Transparent basin Stand and Clamp Cold Water Warm Water Alka Seltzer Tablets Method: 1. Fill the basin half full with type of water. Place the stand beside the basin 2. Fill the graduated cylinder to the brim with the selected type of water and place it carefully upside down in the basin. Cover the mouth of the cylinder with a Petri Dish so that no water spills out of the cylinder when immersing it in the basin
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nitrate is added to water then the water temperature will decrease. . Hypothesis: If ammonium nitrate is added to water then the water temperature will decrease Materials Goggles Gloves 250 ml beaker 150 ml beaker Chemical scoop Petri dish Petri Dish Accurate Scale 12 grams of Ammonium Nitrate Preciously 200 ml of water Beaker Brush (If beaker is not clean) TI CBL system and Thermometer Electric Stirrer or Stirring stick Methods Construct a chart that ranges from 0-10 grams
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properties and how they grow in certain situations. Different samples of bacteria cultures were gathered from different places such as the mouth‚ shaded mulch‚ and from the table top. The samples were collected by using a cotton swab and swiped onto a petri dish filled with nutrient agar. The bacteria were then left to grow on their own in a relatively well shaded area. As a control‚ a cotton swab that had nothing on it was used. It was recognized that different types of bacteria exist in different environments
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and its rate of activity is affected by many things‚ such as temperature and concentration. Theoretical investigation. If the pineapple juice contains an enzyme which is stopping the jelly setting then this can be investigated by using jelly in Petri dishes with holes or wells cut into it. If some pineapple juice is added to these wells then they should get bigger as the enzyme in the pineapple juice will be breaking down the gelatin around the outside of the well‚ causing it to expand. The temperature
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using aseptic transfer techniques. The necessity and value of collecting‚ identifying and analyzing is critical for learning how diseases are acquired‚ spread and therefore prevented. Materials Sterile nutrient agar petri dish Wax Pencil Lens paper Sterile blood agar petri dish Igniter Immersion oil Sterile cotton swabs Crystal violet dye Pen Incubator Grams iodine Paper Refrigerator Alcohol acetone Distilled water Safranin dye Inoculating loop Sink Bunsen burner
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different temperature water baths were created‚ one at 65-70oC‚ the other ice‚ and set aside for Part B. 20 mL of potassium thiocyanate solution were poured into a petri dish. The initial color and all subsequent observations were recorded in the data table. Three drops of iron (III) nitrate were added to different spots in the petri dish‚ and the resulting solution was swirled until the color was consistent. Approximately ½ pea-sized sample of potassium
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approximately two to three years. In this lab Isopods were examined by their different types of behavior. The experiment began with observing the Isopods and then‚ moving on to how they’d react to having a side of moisture in their double-sided dry petri dish. In the independent experiment‚ a side of light and dark was set up to test how the Isopod’s behavior would be effected by having a side of darkness versus being exposed to the artificial light in the classroom. It was hypothesized
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Determination of an Electrochemical Series In electrochemistry‚ a voltaic cell is a specially prepared system in which an oxidation-reduction reaction occurs spontaneously. This spontaneous reaction produces an easily measured electrical potential which has a positive value. Voltaic cells have a variety of uses and you commonly refer to them as a “battery”. Half-cells are normally produced by placing a piece of metal into a solution containing a cation of the metal (e.g.‚ Cu metal in a solution
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