specimens in test tubes A‚ B and C are allowed to incubate for 2 hours. 8. Mark the 3 petri dishes - A‚ B and C. Remove the lid and using the syringe‚ extract 10 ml of the sample mixture from test tube A and place it in the center of petri dish A. 9. Use a new syringe to extract a 10 ml sample from test tube B and place it in dish B and repeat for test tube C/dish C. 10. Replace the petri dish lids and store the petri dishes in a cool and shaded
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people who don’t like the cold temperatures will do things inside‚ just so they don’t go outside. This shows how a stimulus can affect an organism’s behavior and what they do. Hypothesis: For my hypothesis I wrote‚ "If the pill bugs are in the petri dish with the other chemicals then they will go to the filter paper where the sugar is more so then the other filter paper that has chemicals on it". I choose this hypothesis for many reasons. First off‚ I know that most organisms‚ bugs‚ insects‚ etc…
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22 prepared nutrient agar in petri dishes • Timer • Starburst candy (11) • 22 sterile swab • ½ slice of Bologna- Oscar Myer (11) • Sterile gloves G. Procedures 1) Prepare 4 petri dishes with nutrient agar. 2) Put on your sterile gloves 3) Pick up your first food (Starburst candy) and drop it on the ground. 4) Start the timer. 5) Pick up the Starburst candy from the ground after 3 seconds. 6) Swab Starburst candy with a sterile swab. 7) Open the top of the petri dish and take the swab in a zigzag
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Rate of Evaporation of Different Liquids Objective of the Project This project is of the rate of evaporation of different liquid‚ in which we also discuss the factors which affect the rate of liquid. Introduction When liquid is placed in an open vessel. It slowly escapes into gaseous phase ventually leaving the vessel empty. This phenomenon is known as vaporization or evaporation. Evaporation of liquids can be explained in the terms of kinetic molecular model although there
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side on the petri dish. Control: The unlighted side of the opened up petri dish. Purpose: To determine the light sensitivity of terrestrial isopods (rolypolies) in different levels of lighted environment. Number of Trials: Three 30‚ 60‚ and 90 second trials for each specified level of light at 1‚ 2‚ and 3 meters distance. Constants: The temperature of the room‚ petri dish‚ time trials for each trial of light distance testing‚ and the number of trials. Materials: Clear petri dish‚ one projector
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bacterial inhibitor; therefore‚ they save both money and time. If the disinfectants are applied to the bacteria‚ then the zone of inhibition will increase because disinfectants are antimicrobial agents that are applied to non-living objects‚ and a petri dish is a nonliving
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We also hypothesized that adding blue to the petri dish heat shield and red to another heat shield would cause an increase of floating disks compared to the control‚ which had a heat shield containing only water. The results of the first experiment supported our hypothesis‚ as the spinach leaves exposed
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Investigating the effects of acid rain in the growth of cress seedlings IntroductionAcid rain is rain or any other form of precipitation‚ which is unusually acidic. It has harmful effects on plants‚ animals and buildings. Acid rain is mostly caused by human emissions of sulphur and nitrogen compounds which react in the atmosphere to produce acids. Acid rain can slow the growth of vulnerable forests and cause leaves and needles to turn brown and fall off. In addition‚ it depletes minerals from the
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Radish Seed Lab Report Problem: What caffeinated drink (monster‚ coffee‚ or green tea) will the radish seeds grow in the best form over a nine day period? Hypothesis: If the radish seeds put in the dish with the drink Monster‚ then the seeds will grow faster because of the amount of energy given to them. The amount of caffeine in Coffee is much greater than the amount in green tea and Monster‚ but neither coffee nor green tea contains any extra type of an energy booster like the Monster does.
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each solution and placed in 7 Petri- dishes. 2. The potatoes were weighed for each slice and recorded the weight in the table. 3. 2 ml of sucrose solutions was added in each of 7 Petri-dishes contain the following: a. Petri-dish 1: 0.01M b. Petri-dish 2: 0.02M c. Petri-dish 3: 0.05M d. Petri-dish 4: 0.1M e. Petri-dish 5: 0.3M f. Petri-dish 6: 0.5M g. Petri-dish 7: Distilled water 4.
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