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Methods of experimentation
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INTRODUCTION At what pH levels does the Periplaneta americinegar with pH of 2.9, milk of magnesia with pHh of 10.5 ,tomato juice with a ph of 4.1, clorox with a ph of 13 and milk with ph of 6.6.ana die in? In this experiment we will find out what pH levels are deadly for the Periplaneta Americana by exposing them to different pH levels. The Periplaneta Americana will be exposed to vinegar with pH of 2.9, milk of magnesia with pH of 10.5 ,tomato juice with a pH of 4.1, clorox with a pH of 13 and milk with pH of 6.6. HYPOTHESIS If the Periplaneta Americana are exposed to a pH level lower than 5 then all of the Periplaneta Americana will die. VARIABLES IV: the vinegar with pH of 2.9, milk of magnesia with pH of 10.5 ,tomato juice with a …show more content…
Experimental group: Periplaneta Americana exposed to vinegar, clorox, juice, milk and milk of magnesia. Control group: the Periplaneta Americana that were killed by the spray insect killer with a pH level of constants: the place where the substance will be put, the number of Periplaneta Americana in each trial. The size of each Periplaneta Americana needs to be the same. The amount of substance that is applied to the Periplaneta Americana . …show more content…
Pour 25 ml of vinegar in one of the 30 ml beakers. put 10 Periplaneta americana in a 10 oz plastic cup. Grab a pipette and add 20 drops onto the Periplaneta americana, you will put 2 drops on each periplaneta americana wait for 2 minutes, then record on a table how many Periplaneta Americana are dead in the plastic cup. put 10 new Periplaneta Americana in a new plastic cup. Pour 25 ml of clorox in one of the 30 ml beakers. Again grab a pipet and add 5 drops onto each of the Periplaneta americana . Wait for 2 minutes, then record on a table how many Periplaneta americana are dead in the plastic cup. Put again 10 new Periplaneta americana into a new plastic cup. Now pour 25 ml of milk in one of the 30 ml beakers. Once again grab a pipette and add 5 drops onto each of the Periplaneta americana . Wait for 2 minutes, then record on a table how many Periplaneta americana are dead in the plastic cup. Put again 10 new Periplaneta americana into a new plastic cup. Finally pour 25 ml of milk of magnesia in one of the 30 ml beakers. Grab a pipette and add 5 drops onto each of the Periplaneta
The Artemia franciscana can survive in extreme conditions of salinity, water depth, and temperature (Biology 108 laboratory manual, 2010), but do A. franciscana prefer these conditions or do they simply cope with their surroundings? This experiment explored the extent of the A. franciscanas preference towards three major stimuli: light, temperature, and acidity. A. franciscana are able to endure extreme temperature ranges from 6 ̊ C to 40 ̊ C, however since their optimal temperature for breeding is about room temperature it can be inferred that the A. franciscana will prefer this over other temperatures (Al Dhaheri and Drew, 2003). This is much the same in regards to acidity as Artemia franciscana, in general thrive in saline lakes, can survive pH ranges between 7 and 10 with 8 being ideal for cysts(eggs) to hatch (Al Dhaheri and Drew, 2003). Based on this fact alone the tested A. franciscana should show preference to higher pH levels. In nature A. franciscana feed by scraping food, such as algae, of rocks and can be classified as a bottom feeder; with this said, A. franciscana are usually located in shallow waters. In respect to the preference of light intensity, A. franciscana can be hypothesized to respond to light erratically (Fox, 2001; Al Dhaheri and Drew, 2003). Using these predictions, and the results of the experimentation on the A. franciscana and stimuli, we will be able to determine their preference towards light, temperature, and pH.
Start with the hot water and first measure the temperature. Record it. 8. Then pour 40 ml into the beaker. You can measure how much water was used by looking at the meniscus.
On the container, the researchers wrote down their first initial, last name and lab section. The researchers then poured spring water into the cylindrical container about halfway and then set it aside. Next, the researchers transferred the Planarian using a small plastic pipette into an empty petri dish filled with just enough water for the Planarian to swim around freely. After the successful transfer into the petri dish The researchers then measured how long the Planarian was using the unit millimeters.
Each subsequent trial will use one gram more. 2.Put baking soda into reaction vessel. 3.Measure 40 mL vinegar. 4.Completely fill 1000 mL graduated cylinder with water.
3.) Divide your 30g of white substance into the 4 test tubes evenly. You should put 7.5g into each test tube along with the water.
2. Drop a gummy bear into each of your prepared beaker or cup and place the beaker or cup
A total of twelve Daphnia magna were used for this experiment; two Daphnia magna were exposed simultaneously to each of the five chemical
To begin the lab, the variable treatment was prepared as the Loggerlite probe, used to later measure oxygen consumption, warmed up for approximately 10 minutes. To prepare the variable treatment, 200ml of Sodium and Ammo-lock water was measured in a container and a pre-prepared “tea bag” of tobacco was steeped in the room temperature treated water until a light yellow color was visible. After preparing the tobacco solution the preparation for the live goldfish began as two beakers were filled with 100 ml of treated water. Each beaker was weighed before addi...
The purpose of this lab was to study the response of the genus Daphnia to chemical stimuli and to examine human responses to different stimuli. A stimulus is an incentive; it is the cause of a physical response. Stimuli can have a physical or chemical change; an example of a physical change is a change in temperature and sound. An example of chemical change would be changes in hormone levels and pH levels. Muscular activity or glandular secretions are responses that occurs when stimulus information effects the nervous and/or hormone system. Daphnia is a genus; it is a small crustacean that lives in fresh water. The body of the daphnia is visible and its internal organs are clearly seen thus it was chosen for this exercise. The
Planning Firstly here is a list of equipment I used. Boiling tubes Weighing scales Knife Paper towels 100% solution 0% solution (distilled water) measuring beakers potato chips Cork borer. We planned to start our experiment by doing some preliminary work. We planned to set up our experiment in the following way.
Plan 1. Collect 4 different sized beakers 2. Boil some water in the kettle 3. Pour 50ml into each beaker 4. After 1 minute check temperature 5.
2. In the large beaker, put water and boil it completely. After that, remove the beaker from heat. 3. Sample tubes (A-D) should be labeled and capped tightly.
In a 100ml beaker place 50mls of water, measure the temperature of the water and record this initial temperature onto a table. Set the timer and add one teaspoon of Ammonium Nitrate to the water, stir this continuously until the Ammonium Nitrate has dissolved.
Rinse a 25mL buret with three 5mL portions of standard permanganate solution. Fill the buret with the standard permanganate solution and record initial and final readings.
The EDTA tube required 0.5 M EDTA to be added until the solution reached 1.25 mL of EDTA. To the Control tube, distilled water had to be added. Once done, this tube now contained 1.25 mL of water. After these steps were done, each tube called for three drops of milk. The tubes must then be inverted and allowed to sit for one minute.