microscope slide | * Water (20cm²) | * Microscope slide cover | * Caffeine Solution (20cm²) | * Microscope | * 1 daphnia | * Thermometer | * Stopwatch/timer | * Petri dish * Two experimenters | * Pen * Paper | 1. A concaved microscope slide is placed in a lidless Petri dish. 2. A tiny strand of cotton wool
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Temperature‚ bacteria‚ Petri dish‚ agar‚ nutrient broth‚ time Manipulating Variable: Antibiotics (Penicillin‚ Neomycin‚ Erythromycin) Responding Variable: Zone of inhibition Materials: * Petri dish * Nutrient broth * Cotton swab * 37 degree Celsius incubator * Forceps * Ruler * Permanent marker * tape Procedure: 1. Gather supplies 2. Make lines on the back of the Petri dish separating them into 4 equal quadrants 3. Swab Petri dish using Q tip with
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Investigating Question: Does the concentration of salt in the water‚ affects the germination of the seed? Purpose: To see if the salinity of the water affects the germination of the seed‚ before its put into the soil. Back Ground Information: Seed germination is the sprouting or growth of a seed into the start of a plant. When environmental factors such as moisture‚ temperature‚ oxygen‚ and sometimes light are appropriate‚ a viable seed will begin to germinate. Salinity (salt-affected)
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temperature Apparatus/materials: • Pipette • Petri dish • Filter paper • Silicon grease • Needle • 0.1%‚ 0.2%‚0.3%‚0.4%‚0.5% of caffeine solutions • Daphnia culture Methodology: • Select a large specimen and‚ with a pipette‚ transfer it to the centre of a small‚ dry petri dish. with filter paper remove excess water from around the specimen so that it is completely stranded • With a seeker place a small blob of silicone grease onto the floor of the petri dish. Then wipe the needle clean and use it
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that its native environment is under rocks in bodies of water. Materials and Methods: The materials we used were the microscope‚ a small brush (to extract the planarian)‚ slides‚ petri dished‚ black paper‚ glue‚ talc powder‚ a flashlight‚ and liver pieces. First‚ we placed the planarian into the petri dish; we observed its initial movements. They seemed to stray away from light sources. When we touched its body‚ it did not respond. When we touched its head‚ it curled up and tried to get away
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Battery lead with alligator clips Petri dish‚ disposable Battery‚ 9-Volt Graduated cylinder‚ 25- mL Safety Precautions: Universal indicator is an alcohol-based solution and is flammable; do not use near an open flame. Wear chemical splash goggles‚ chemical-resistant gloves‚ and a chemical-resistant apron. Please review current Material Safety Data Sheets for addi-tional safety‚ handling‚ and disposal information. Procedure: 1. Place the two halves of a Petri dish on the projection stage of
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temperature of the water and the volume of the water. Materials: - petri dish - test tube - 80 mL beaker - 300 mL beaker - graduated cylinder - 5 50 mL samples of distilled water - Bunsen burner - metal ring stand - thermometer - stopwatch Method 1. Measure in cm the radius of each the petri dish‚ test tube‚ graduated cylinder‚ and two beakers. Calculate the area of each. 2. Pour 50 mL of distilled water into petri dish. Repeat for test tube‚ graduated cylinder‚ 80 and 300 mL beakers
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agar Petri dish‚ the bacteria Serratia marcescens‚ Erythromycin antibiotic disk‚ Ampicillin antibiotic disk‚ Penicillin antibiotic disk‚ sterile disk of blank filter paper‚ marking pen‚ long handled cotton swab‚ forceps‚ metric ruler‚ and a 37°C incubator. For our procedure we first filled our sterile Petri dish with agar‚ just so that the bottom of it was covered‚ then waited a day for it to condense. Then after it had hardened‚ we then we turned it over and marked the back of the Petri dish
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fitness providing a greater chance at survival. With a measuring clasp the body mass‚ leg length‚ body lengths were determined. Room temperature was recorded at 27°C using a thermocouple connected to a thermometer. The Beetles were placed in a petri dish and left to incubate until they were calmer and familiar with their surroundings. Their running speed was then determined over a 30 second period using a stopwatch. Our aim was to investigate the question: What effect does different hind leg lengths
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each replicate a lady beetle is places in a petri dish with aphids; 3 lady beetles are placed in a dish with aphids; and insecticide was used against the aphids. Materials & Methods In order to conduct the experiment a total of twenty four petri dishes were used. Three petri dishes were used for each replicate. Five aphids were placed in each petri dish. The first petri dish of a given replicate contained one lady beetle; the second petri dish contained three lady beetles; and the third
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